PV Investment Risk 2026: The Skeptics' Hub for Investors in the Due Diligence Phase
Excerpt
Eight risk areas that every PV investor must examine during the due diligence phase in 2026—ranging from revenue write-offs due to negative electricity prices to provider bankruptcies and Italy-specific retroactive regulatory interventions. Includes specific case numbers, mitigation strategies, and a checklist.
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The risks associated with solar investments fall into four main categories: technical, economic, regulatory, and political risks—and in 2026, these risks are not related to solar irradiance, but rather to eight specific risk areas that every investor should examine during the due diligence phase prior to making an inquiry. Specifically: Loss of revenue due to negative electricity prices (573 hours in 2025), decline in the market value of the solar capture rate, module and inverter lifecycles, provider insolvencies with specific case numbers, site and permitting risks, tax pitfalls, and—in the case of foreign investments—Italy’s proven willingness to intervene retroactively. Anyone familiar with these risks associated with a photovoltaic system as an investment can distinguish between reputable offers—and those that are not. Realistic returns on reputable solar investments range from 6–10% per annum, with tax benefits potentially increasing this to 10–12%. The minimum investment amount is typically €100,000.
Table of Contents
Market Value Decline: When the Solar Industry Cannibalizes Itself
Provider Bankruptcies: Ten Cases Every Investor Should Know About
Structural Risks: Subordination, Profit Participation Rights, and Ownership of the Solar Park
Site and Project Risks: Lease, Grid Connection, Decommissioning
Risks Specific to Italy: What German PV Investments Don't Show
Spotting Fraud: BaFin’s Twelve Warning Signs for Solar Investments
Due Diligence Checklist: 30 Points to Consider Before Every Inquiry
Why This Guide to PV Investments Exists
This guide is not a marketing piece. Anyone investing €100,000 or more in a photovoltaic system has the right to a comprehensive list of risks—without any sugarcoating. This page lists eight risk areas with specific case numbers, hours required, laws, and mitigation strategies. Anyone who remains interested after reading this is qualified.
The background: In 2026, many providers are marketing photovoltaic investments as “green fixed-income investments”—as a safe, tangible asset with a guaranteed return. This is incorrect. A PV investment is an equity stake in a photovoltaic system with specific risks that have shifted significantly since 2023: due to the Solar Peak Act, the CfD reform, the cannibalization effect of solar generation itself, a series of provider bankruptcies—and the ongoing expansion of renewable energy, which is changing the market dynamics for every individual photovoltaic system.
This guide is intended for investors in the due diligence phase who want to systematically assess the risks associated with solar investments before making a specific commitment—typically private investors with an investment amount between €50,000 and €500,000, family offices, and entrepreneurs seeking tax optimization.
The Four Main Categories of Risks in Solar Investments
The risks associated with solar investments fall into four main categories: technical risks, economic risks, regulatory risks, and political risks. Each category encompasses one or more of the eight specific risk areas discussed in this guide.
| Main Category | Definition | Assigned Risk Areas |
|---|---|---|
| Technical Risks | Risks Related to Materials, Equipment, and Location Over the Lifespan of the Photovoltaic System | Module Degradation and Inverter Lifecycles · Site and Project Risks (Lease, Grid Connection, Decommissioning) |
| Economic Risks | Risks Related to the Electricity Market, Supplier Creditworthiness, and Ownership Structure | Decline in market value due to cannibalization · Provider insolvencies · Structural risks (subordinated debt, profit participation rights, ownership issues) |
| Regulatory Risks | Risks Arising from Legislative, Tax, and Regulatory Requirements in Germany | Regulatory Measures (Solar Peak Act, Mandatory CfD) · Tax Pitfalls (Investment Deduction, Hobby Activity, VAT) |
| Political Risks | Risks arising from political decisions—particularly retroactive interventions abroad and provider fraud | Risks of Retroactive Effects Specific to Italy (Spalma Incentivi, ECJ C-423/23) · BaFin Warning Signs and Investment Fraud |
| Classification based on the four-category taxonomy commonly used in practice for renewable energy investments (technical / economic / regulatory / political). | ||
Logic Energy wrote this guide because a well-informed investor deserves the same answers during the due diligence phase as a family office does before making an institutional investment. We have nothing to lose by being honest. We gain investors who know what they’re doing—and which investment options are actually right for them.
Anyone who submits an inquiry through the investor page at the end of this guide has already read and accepted the risks.
Regulatory Interventions: What Legislators Will Be Allowed to Do Regarding Photovoltaic Investments in 2026
The most significant regulatory risk in 2026 is the Solar Peak Act. As of February 25, 2025, the EEG market premium no longer applies to new systems of 2 kWp or more starting from the first quarter-hour in which the day-ahead price is negative. There were 573 such hours in 2025—a record. There is no longer a grace period. Compensation: Extension of subsidies at the end of the 20-year period.
Lawmakers have tightened the rules governing photovoltaic feed-in tariffs on several occasions without affecting existing systems—grandfathering provisions remain in place. However, any new system installed on or after February 25, 2025, will be subject to a new regime that alters the certainty of revenue.
The History of the Hour Rule:
| Period | Waiting Period | Source |
|---|---|---|
| before 2023 | 6 hours | Section 51 of the EEG 2017 |
| 2023 | 4 hours | EEG 2023 |
| 2024 through February 24, 2025 | 3 hours | EEG 2023 (Amendment) |
| Effective February 25, 2025 (new installations ≥2 kWp) | 0 hours — immediate downtime starting from the first quarter-hour | Solar Peak Act, Federal Law Gazette 2025 I No. 51 |
| Starting in 2027 (planned, all direct sales) | 1 hour (under discussion) | EEG 2027 Cabinet Draft |
| Source: Federal Network Agency, EEG|KWKG Clearing House, gesetze-im-internet.de §51 EEG 2023, Solar Peak Act, Federal Law Gazette 2025 I No. 51. | ||
What this means in concrete terms: In 2025, we had 573 hours with negative day-ahead prices—about 6.5% of the hours in the year. For a 1 MWp ground-mounted solar farm, this corresponds to about 8–12% of annual generation during hours when the feed-in tariff is now completely forfeited. Revenue is lost precisely during these periods. This is offset by Section 51a of the EEG: The 20-year subsidy period is extended at the end by full-load quarter-hours (factor of 0.5). Mathematically, 20 years become approximately 20 years and 5 months—a significant shift in cash flow well into the future.
Solar Package I (effective May 16, 2024): +1.5 ct/kWh for system components >40 kWp, subject to EU state aid approval; mandatory tendering starting at 750 kWp (instead of 1 MWp); mandatory direct marketing threshold remains at 100 kWp.
EU Legal Basis for CfDs Effective July 17, 2027: Article 19d of Regulation (EU) 2019/943, as amended by the 2024 Electricity Market Reform. Requirement for all new support schemes to use bilateral contracts for difference.
A closer look at the Skeptiker-Check analysis of the 2026 revenue argument shows how investors factor in CfDs, the phase-out of the EEG, and rising module prices into their overall decision.
Market Value Decline: When the Solar Industry Cannibalizes Itself
The solar capture rate in Germany has fallen from 98% (2022) to 54% (2025, weighted). In the summer of 2025, it will at times fall below 50%. This means that solar energy from the spot market will now yield only slightly more than half of the day-ahead average price, because generation is concentrated during midday peaks. Anyone evaluating a photovoltaic investment based on historical capture rates >80% will no longer see that calculation hold true today.
Solar cannibalization has become the underestimated risk of 2025. It has a similar effect to a creeping reduction in feed-in tariffs—except that it isn’t driven by legislation, but rather by the simple fact that all PV systems are feeding power into the grid at the same time.
| Year | Solar Capture Rate in Germany | VWAP Solar (€/MWh) | Source |
|---|---|---|---|
| 2022 | 98 % | ~230 €/MWh | S&P Global |
| 2023 | 76 % | ~79 €/MWh | S&P Global |
| 2024 | 59–69% (depending on the methodology) | 54.64 €/MWh | Enervis, S&P Global |
| 2025 | 54 % (gewichtet); zeitweise <50 % im Sommer | ~50 €/MWh | Modo Energy |
| Source: S&P Global Commodity Insights, Enervis, Modo Energy 2025. VWAP = Volume-Weighted Average Price. | |||
Why this happens: 43% of Germany’s solar energy production occurs in just three months—June, July, and August. During these months, the oversupply of solar power drives down the spot price precisely when every photovoltaic system and solar farm is feeding power into the grid at the same time. Italy will still have high capture rates of 86–89% in 2024, but the trend is heading downward there as well. Cross-border cannibalization is spreading toward Austria, the Czech Republic, Hungary, and Romania—with direct consequences for every photovoltaic investment in these markets.
What a reliable cash flow model must do: Use realistic capture rates in its calculations (50–60% in Germany, 65–80% in Italy, depending on the region), not historical rates of 80–90%. If a sales prospectus lists only the day-ahead average and does not include a separate solar spread assumption, investors should ask for clarification. For investors looking to add photovoltaics to their portfolio, this metric is more important than the nominal module output.
Mitigation: Battery storage (co-location), direct marketing strategies with profile optimization, long-term PPAs with creditworthy customers. For more information, see the 2026 Guide to Direct Marketing of PV Electricity.
Technical Risks of a Photovoltaic System Over 20 Years
According to a long-term study by Fraunhofer ISE, module degradation actually averages about 0.15% per year—significantly better than is often cited. However, inverters last 10–15 years and must be replaced at least once. Module manufacturers can go bankrupt—in which case the 20-year warranty is worthless. PID effects in ungrounded systems can cause up to a 30% loss in power output.
The technical risks are manageable—if you’re aware of them and factor them in. Anyone who relies on the promises in advertising brochures will be in for a disappointment in year 12. An honest risk assessment is an essential part of any planning process prior to the commissioning of a photovoltaic system.
Module Degradation: What the Sun Does to Solar Panels
The frequently cited 0.5% per year is a conservative guarantee figure, not the actual reality. In a long-term study of 44 rooftop systems, Fraunhofer ISE measured actual degradation of about 0.15% per year. However, light-induced degradation (LID) reduces output by 1–2% in the first few days of operation, and potential-induced degradation (PID) in ungrounded systems can cause up to a 30% loss in output (Fraunhofer CSP tests). In some TOPCon modules, UV-induced degradation (UVID) of up to 5% was detected in 2024/2025 following a UV dose of 60 kWh/m².
Inverter Lifespan: The Factor Every Investor Overlooks
On average, 10–15 years. For every 20-year system, at least one complete replacement is practically guaranteed. Costs: €1,200–2,500 per unit, plus €150–600 for installation. For a 1-MWp system, these figures scale accordingly. If you do not find an explicit inverter replacement reserve in the investment prospectus, you should inquire about it.
Warranty Issues in the Event of a Module Manufacturer's Bankruptcy
A module manufacturer’s voluntary performance warranty is typically worthless in the event of insolvency. Case studies: SolarWorld (insolvency in 2017), Q-Cells (2012), Solar Millennium (2011), and most recently Meyer Burger—the German subsidiaries Meyer Burger (Industries) GmbH and Meyer Burger (Germany) GmbH filed for insolvency on May 31, 2025, while the U.S. company filed for Chapter 11 on June 25, 2025. Module warranties are only valuable if they are backed by warranty reinsurance—which is rare. For investors, this means: The cost of purchasing new modules after 20 years is factored into the price, and an early replacement due to manufacturer failure is an additional risk factor.
Fire Risk and Repowering of the Photovoltaic System
Fire risk: Statistically low (approximately 0.016% of systems per year, according to TÜV data), but the damage is significant if a fire occurs. DC arc faults, MC4 connector issues. Should be covered by an all-risk policy and business interruption insurance.
Repowering: Solar Package I allows for module replacement without proof of defect while preserving the remaining feed-in tariff. Relevant in practice after 15–20 years — a must for any serious investment plan.
Provider Bankruptcies: Ten Cases Every Investor Should Know About
Photovoltaic investments involving provider insolvency are not a residual risk, but a recurring pattern. Solar Millennium (2011): 30,000 investors, insolvency rate around 10%. Prokon (2014): 75,181 investors with €1.38 billion in profit-sharing capital. Sonneninvest, econnext, Exporo Limespark, DEGAG WI8—the list continues to grow from 2024 to 2026. Anyone who fails to assess structural risks accepts total loss as a realistic scenario.
The chronicle of failed solar power investments is a must-read for every investor. It shows that the problem isn’t the sun—it’s the structure and the provider. Anyone investing in solar equity funds, impact funds, or closed-end solar funds should scrutinize the provider’s track record with the same care as the technology itself.
| Case | Date | Investors / Volume | File Number / Source |
|---|---|---|---|
| Q-Cells AG | April 2012 | the world's largest module manufacturer at the time | Insolvency Proceedings for AG Dessau-Roßlau |
| Solar Millennium AG | December 2011 | ~30,000 investors, €227 million in bonds + €54 million in funds | Insolvency rate ~10% (according to insolvency administrator Böhm, 2015) |
| Prokon | January 2014 | 75,181 investors, €1.38 billion in profit-sharing rights | Restructuring Plan Through a Member-Owned Cooperative |
| SolarWorld AG | May 2017 | Module warranties (20 years) are worthless | AG Bonn |
| te Solar Sprint IV | 04.07.2022 | BaFin §11a Publication, May 12, 2022 | Leipzig Regional Court, 401 IN 800/22 |
| Sonneninvest Deutschland, LLC | 24.09.2024 | Investor Portfolio | Erfurt Regional Court, 171 IN 290/24 |
| Exporo Limespark (WI Property Company 66) | 26.03.2025 | Crowd investors | Stuttgart Regional Court, 9 IN 1377/24 |
| DEGAG WI8 | 12.02.2025 | BaFin §11a VermAnlG Report | BaFin Publication |
| Meyer Burger (Germany / Industries) GmbH | 31.05.2025 | Over 900 jobs, module manufacturer | AG Chemnitz / Halle (Saale); U.S. Chapter 11, June 25, 2025 |
| econnext / Autarq, among others | 11.06.2025 | Preliminary Insolvency Proceedings for BBL Brockdorff | AG Charlottenburg, Insolvency Quota Still Undetermined |
| Sources: Insolvenzbekanntmachungen.de, BaFin publications (Section 11a of the German Investment Act [VermAnlG]), Stiftung Warentest, pv magazine, Handelsblatt, BBL Brockdorff press release dated June 11, 2025. | |||
What this list shows: Subordinated loans, profit participation rights, and crowdinvesting structures are the last to be repaid in the event of insolvency. In a 2024 study of 2,500 crowdinvesting investments, Stiftung Warentest identified 313 insolvent issuers—a rate of 12.5%. In the case of Ecoligo (solar crowd investing), Stiftung Warentest reported in May 2026 that of the €64 million in invested capital, only 13% had been repaid on time; a Trine restructuring agreement suggests that only about 60% of the agreed-upon amounts can be expected to be repaid. A genuine real-asset investment, on the other hand—involving ownership of the physical asset—offers significantly greater resilience when properly structured.
An in-depth analysis of all three crowd-versus-direct structures in a direct comparison of crowd investing versus direct investment in 2026.
Structural Risks: Subordination, Profit Participation Rights, and Ownership of the Solar Park
Three factors determine whether an investment will result in a total loss or provide protection in the event of insolvency. First: Who legally owns the investment? Second: How high up in the insolvency hierarchy is the claim ranked? Third: What is the provider’s liability structure? Equity interests rank higher than profit participation rights, which in turn rank higher than subordinated loans—the risk decreases in that order.
The issue of structure is the most important consideration in any photovoltaic investment—and, at the same time, the one that is explained the least effectively during sales pitches. It determines whether a solar investment will retain its value in the event of a crisis or result in a total write-off.
| Structure | Ownership | Insolvency Priority | Risk Class |
|---|---|---|---|
| Direct Investment (Own Investment / Limited Partner) | Yes, on the asset | primary (owner) | low |
| Closed-End PV Fund (AIF) | indirectly | per structure | medium |
| Subordinated Loan / Profit Participation Right | No | subordinate | high |
| Crowdfunding with a Qualified Subordination Clause | No | deeply subordinated | very high |
| Sources: VermAnlG, KAGB, ECSP Regulation (EU) 2020/1503, BGH III ZR 261/23 (March 20, 2025) on the liability of managing directors in connection with subordination clauses. | |||
What makes structural risks specific to the solar industry is this: Many providers operate with interdependencies between the initiator, the operator, and the service company. When the same person sets up the fund, operates the plant, and collects the service fees, a systemic conflict of interest arises. Reputable structures either separate these roles or transparently document the interdependencies.
Citizen Energy Cooperatives and Impact Funds: Structures for Renewable Energy
Citizen energy cooperatives: Limited liability up to the amount of the membership shares, but the articles of association may provide for additional capital contributions. The BaFin prospectus requirement applies as soon as membership and a specific project are advertised together—a violation results in a fine for the board of directors.
Impact funds and closed-end solar funds: Regulated as AIFs under the German Investment Fund Act (KAGB) and supervised by BaFin. Exercise caution with blind-pool structures (investment targets not yet defined) and in cases where the initiator has ties to the operating company. The secondary market for fund shares is illiquid; selling before maturity is usually only possible at a significant discount.
Sale-and-Lease-Back and Leasing Models
In 2014/2015, BaFin ruled that, if structured in a risk-oriented manner, a finance lease does not require authorization under the German Banking Act (KWG). However, a case-by-case review is necessary. “Model contracts” are not universally reliable.
Trust Criterion: Owner Liability Instead of an SPV GmbH
As the contracting party, mediplan Helm e.K. is personally and unlimitedly liable with its assets pursuant to Sections 1, 17, and 19 of the German Commercial Code (HGB). This is the key difference from GmbH/UG structures, in which liability is limited to the share capital (often €25,000 for SPVs). For a €5 million solar park structured as a GmbH, the provider’s maximum liability would be approximately 0.5% of the investment. With personal owner liability, however, liability is unlimited.
Site and Project Risks: Lease, Grid Connection, Decommissioning
Four site-related risks must be assessed before a PV investment is finalized: the quality of the lease agreement, building permits, a commitment to grid connection, and a decommissioning guarantee. A single mistake can bring the project to a standstill—even if the plant is technically flawless. Proactive land acquisition and secured financing before construction begins mitigate the first two risks.
The success of a system depends entirely on its location—and on the legal framework surrounding it. Whether it’s a rooftop or open space, a commercial property or fallow farmland: Every photovoltaic project is subject to a series of legal requirements that must be clarified before purchasing the system.
Lease and Building Rights: Where the Solar Park Really Stands
Open-space lease agreement: Standard market terms of 20–30 years with two 5-year renewal options. Indexed to the consumer price index. Lease payments in 2024/2025 typically range from €2,500 to €4,500 per hectare per year—for a 10-hectare solar park, this corresponds to an annual cost of €25,000 to €45,000. Critical question: What happens if the landowner becomes insolvent? Protection exists only if an easement is registered in the land registry. A lease agreement based solely on the law of obligations can be challenged by the insolvency administrator in the event of insolvency.
§ 35 of the German Building Code (BauGB): Open-space PV projects are not generally given preferential treatment. Land-use planning is required. A resolution to adopt a plan may be blocked by a referendum. Solar Package I grants preferential treatment only to agri-PV.
Utility Connections, Land-Related Risks, and Nature Conservation
Grid connection: Wait times for a 110-kV connection are currently 18–36 months. Feed-in management/curtailment compensation is only 95% under Section 13a of the Energy Industry Act (EnWG). Starting in 2025, the Solar Package I will require distribution system operators to use a portal—transparency will improve.
Soil risks: Contaminated sites (particularly former industrial and military sites), munitions contamination (Eastern Germany), archaeological finds (particularly in Italy—construction may be suspended by the Soprintendenza).
Nature Conservation: Sections 44 of the Federal Nature Conservation Act (BNatSchG), species protection laws. Arguments regarding habitat loss for bird and bat species. High risk of regulatory requirements.
Obligation to Dismantle and Guarantee
§ 35(5) of the German Building Code (BauGB): The guarantee typically ranges from €30,000 to €60,000 per hectare. Key consideration: Should it be a bank guarantee (secure) or a corporate guarantee from a downstream company (risky)? A reputable investment will disclose this information transparently.
Tax Pitfalls: Investment Deduction, Hobby, VAT Trap
Three tax risks are particularly relevant in 2026: First, the “hobby” issue in cases of very tight return projections. Second, the risk of a family-owned civil law partnership (GbR) being classified as a commercial entity due to a small investment in a photovoltaic (PV) system (3% de minimis threshold under Section 15(3) of the Income Tax Act (EStG)). Third, the VAT option trap when switching to the small business regime—Section 15a of the Value-Added Tax Act (UStG) requires an input tax adjustment spread over 5 years.
Photovoltaics are attractive from a tax perspective—the tax benefits range from the investment deduction (IAB) to special depreciation and declining-balance depreciation. But the pitfalls are particularly tricky. Anyone who makes a PV investment without consulting an expert tax advisor risks more than just a fine. The following risk factors related to tax law will be particularly relevant in 2026.
Hobby and Commercial Infection
Suspected Hobby Activity: If the projected return is very slim, the tax office may deny the deduction for income-related expenses or business expenses. Rationale: The investment is operated without the intent to make a profit. Defense: A viable profitability forecast over 20 years showing a positive total profit.
Commercial Impact: For tax purposes, a solar power system is generally considered a commercial activity. In an asset-managing partnership (e.g., a family-owned GbR with real estate), a small solar power system can “affect” all income—Section 15(3) of the German Income Tax Act (EStG). The 3% de minimis threshold must be monitored.
Investment Tax Credit (IAB) and Section 3, No. 72 of the Income Tax Act (EStG): Tax Pitfalls
§ 3 No. 72 of the Income Tax Act (EStG) (Tax exemption for small solar power systems since 2022): This sounds like an advantage—but for asset-managing partnerships, it can lead to the reclassification of business assets and thus result in a taxable event for hidden reserves.
Current Federal Fiscal Court (BFH) case III R 39/25 (pending): Treatment of the investment deduction (IAB) under Section 7g of the Income Tax Act (EStG) for assets used for self-consumption. A decision is expected in mid-2026. Consult with your tax advisor before signing.
VAT Option Trap When Changing the Taxation Method
When switching from standard taxation to the small business scheme, Section 15a of the German Value-Added Tax Act (UStG) requires an input tax adjustment over the 5-year adjustment period. For a 1 MWp system with net investment costs of €800,000 and 19% input tax, this corresponds to a refund of up to €30,400 per year in the first few years following the switch.
More details: The complete tax framework—including the investment tax credit, special depreciation, and a sample calculation for the effective tax refund—can be found in the guide *Photovoltaics: Save on Taxes 2026*.
Risks Specific to Italy: What German PV Investments Don't Show
In 2014, Italy enacted the “Spalma-Incentivi” decree, which retroactively imposed tariff cuts on Conto Energia installations exceeding 200 kWp—a reduction of 17–25%. This was followed in 2022 by Art. 15-bis of Decree-Law 4/2022 (revenue cap). In 2026, the European Court of Justice (C-423/23 of January 22, 2026) approved these retroactive measures in principle. Decree-Law Bollette 21/2026 (Law 49/2026) brings a new wave—“Spalma-Incentivi 2.0”—with a deadline for opting in of May 31, 2026. Investing in Italy is not for investors who are sensitive to retroactive measures.
In 2026, Italy is likely to be the most profitable—but also the riskiest—location for PV investments within the EU. The prospects for direct solar investments are technically attractive—but history explains why they remain challenging at the same time.
The History of Retroactivity:
| Year | Intervention | Affected individuals |
|---|---|---|
| 2014 | DL 91/2014 “Spalma-Incentivi” — Conto Energia >200 kWp reduced retroactively by 17–25% | All 4°/5° Conto-Energia systems >200 kWp |
| 2017 | Italian Constitutional Court Ruling 16/2017 Confirms Constitutionality | No further domestic legal remedy |
| 2022 | Art. 15-bis of Decree Law 4/2022 — Revenue cap with zonal reference prices of 56–75 €/MWh (instead of the 180 €/MWh EU cap) | PV systems >20 kWp under the Conto Energia program and systems >20 kW installed before January 1, 2010 |
| 22.01.2026 | ECJ C-423/23 (Secab) — Revenue Skimming Generally Approved; 5 Criteria for National Courts to Consider | Message: Could Happen Again in the Event of an Energy Crisis |
| 2026 | Decree-Law 21/2026 (Law 49/2026) — “Spalma-Incentivi 2.0” with an opt-in deadline of May 31, 2026 (rate reduction of 15–30% or exit with 90% NPV in 10 installments) | Conto Energia Capacity >20 kW, max. 10 GW |
| Sources: McDermott Will & Emery, Osborne Clarke, Winston & Strawn, VareseNews (ECJ C-423/23, Jan. 22, 2026), Gazzetta Ufficiale No. 90/2026 (Law 49/2026). | ||
Aree Idonee and FER X: What Can Still Be Built in Italy in 2026
Eligible Areas (Decree of the Minister of the Environment, June 21, 2024, and Decree-Law on Agriculture No. 63/2024): Prohibition of ground-mounted PV systems on land classified as agricultural. Exceptions: abandoned quarries, fallow land, railroad and highway right-of-ways, and agri-PV systems with a minimum height of 2.1 m. In its ruling of May 13, 2025, the Lazio Regional Administrative Court (TAR Lazio) partially annulled the decree. A corrective decree dated November 20, 2024, limits the amount of “Idoneo” agricultural land to 0.8–3% of the total agricultural land area per region.
FER X Transitional Provision (DM 457 of Dec. 30, 2024, effective Feb. 28, 2025): Bilateral CfD over 20 years, 95% of energy under contract, strike price of 85 €/MWh, auction cap of 95 €/MWh. First PV auction, July 14–September 12, 2025: 7.7 GW allocated to 474 projects, weighted average of 56.825 €/MWh — well below the cap, reflecting the competitive pressure.
Investment Protection and Taxes for Direct Solar Investments in Italy
Investment Protection: Italy withdrew from the Energy Charter Treaty in 2016. New investments no longer enjoy ECT protection; existing investments with a sunset clause are still covered for 20 years.
Tax-wise: Italian SRLs are subject to IRES at 24% + IRAP at 3.9%. IRAP is due even in the event of a loss. Withholding tax on dividends is 26%; the Italy-Germany Double Taxation Agreement reduces this to 15%; the remaining 11% must be refunded separately through the Centro Operativo di Pescara—the processing time is several years. For holdings via a German holding company with a ≥10% stake and a holding period of ≥12 months: EU MTR (Parent-Subsidiary Directive) reduced to 0%.
Market details in the 2026 Italy Solar Market Update.
Spotting Fraud: BaFin’s Twelve Warning Signs for Solar Investments
In 2024 and 2025, BaFin published a list of warning signs for unscrupulous providers in the area of investment fraud. Twelve of these are particularly relevant to the solar industry. Anyone who notices more than three of these signs with a provider should cancel the investment.
The most important BaFin warning signs (abridged and adapted to solar investments):
Returns above 7% per year with no plausible explanation —low returns are not a sign of quality, but exceptionally high returns without any apparent structural risk are a warning sign.
"Guaranteed" returns on equity-like investments — only a bank with deposit insurance can offer a true return guarantee.
Advertising that implied “savings account-like features” or “safety for minors” —which is prohibited for subordinated products—was a key point of criticism regarding Prokon’s marketing.
Complex interrelationships between the initiator, operator, and service company, all under a single entity, without external oversight of the use of funds.
No published performance records for the predecessor fund. If someone doesn't show their track record, it's because they don't want to.
Pressure to make a quick decision — “Only two spots left!” is a sales tactic, not a fact.
Call for data to be transmitted via messaging apps instead of encrypted platforms.
Providers not listed with BaFin in the areas of investment, securities, or crowdfunding platforms (ECSP license).
People who claim to help open bank accounts using remote access software — a classic scam.
Italy/Spain projects without a clear statement on the risk of retroactive effects in the prospectus.
Returns of over 10% per year with exposure to Italy and Eastern Europe, without reference to Energy Charter Treaty status.
Crowdfunding platforms without EU crowdfunding authorization (ECSP Regulation (EU) 2020/1503, fully applicable as of November 10, 2023).
Consumer protection resources: BaFin, Stiftung Warentest/Finanztest, Federal Association of Consumer Advice Centers. If you suspect investment fraud: BaFin complaint form or a consumer advice center.
Due Diligence Checklist: 30 Points to Consider Before Every Inquiry
This checklist outlines the minimum requirements for due diligence—it is not a comprehensive investment audit. It is divided into five sections: Regulatory, Provider, Structure, Market, and Tax. Anyone who can address all the points in each section is eligible for consideration. Anyone who leaves more than three points unaddressed should conduct further research or consider other providers.
A. Regulatory Framework: What laws apply to this photovoltaic system?
EEG Status of the Facility as of the Reference Date Verified — Does the "0-Hour Rule" Apply, or Is Grandfathering in Effect?
Italy: Conto Energia Cohort Documented (Are the 4th and 5th Conto Energia Cohorts Affected by the Incentive Spread)?
Is there a lease or license agreement in place, and has the easement been entered in the land register?
Is the building permit final (has the deadline for filing a lawsuit expired)?
Is a grid connection commitment legally binding (not just a “reservation”)?
Decommissioning Guarantee: Bank or Corporate Group? Is Creditworthiness Checked for a Corporate Group Guarantee?
B. Provider Check: Who is behind the solar investment?
Is performance data available for all previous products covering at least 10 years?
Is BaFin registration documented (investment with a VIB, securities with a prospectus, or an ECSP license)?
Managing Director's Background: Bankruptcies, Criminal Proceedings, Professional Disqualifications?
Audit of the Use of Funds by an External Auditor or Trustee?
Separation of Initiator, Operator, and Service Provider: Who Benefits from Which Margins?
Liability Structure of the Contracting Party: Sole Proprietorship (e.K.) or Limited Liability Company (GmbH/UG)?
C. Structural Features: Direct Investment, Fund, or Subordinated Debt?
Legal form of the investment: Direct ownership, limited partner, subordinated loan, profit participation right?
For subordinated debt: qualified or simple?
Are the term and standard termination options documented?
Has the tax status (business income / V&V / investment income) been confirmed by a tax advisor?
Has the senior/subordinated structure for debt been clarified?
Minimum placement threshold and right of withdrawal upon signing?
D. Market Risks: Realistic Assessment of Returns on Photovoltaic Investments
Solar capture rate assumption in the cash flow model: 50–60% (DE) or still the historical 80–90%?
What percentage of revenue depends on negative electricity prices (sensitivity analysis)?
PPA Customers: Creditworthiness (Investment Grade?), Term, Pay-as-Produced vs. Baseload Profile?
Has the inverter replacement reserve been explicitly calculated?
Is a repowering reserve budgeted for years 15–20?
Is the inflation indexation of lease and O&M costs transparent?
E. Taxation and International PV Investments
For investments in Italy: Should you hold shares through a German holding company (EU-MTR) or hold them directly?
Should an application for a withholding tax reduction be planned in advance (DBA registration in Pescara)?
Regarding Italy: Loss of ECT protection documented (Italy withdrew in 2016)?
§ 7g EStG (IAB): Awaiting BFH III R 39/25 or Approved by Tax Advisors?
Hobby Risk: Is the 20-Year Total Return Forecast Positive?
For family civil law partnerships (GbR): Is the 3% de minimis threshold (§ 15(3) EStG) being monitored?
Anyone who would like to go over these 30 points with a reputable provider can sign up for an initial consultation on the PV investor model.
When a Solar Investment Still Makes Sense
In 2026, photovoltaics will remain an attractive investment option for investors who understand and factor in the specific risks. Realistic returns range from 6–10% per annum on a base level, with targeted tax strategies potentially increasing this to 10–12%. Minimum investment: €100,000. If you choose ownership over subordinated debt, direct investment over crowdfunding, personal liability over an SPV GmbH, and a provider with active land acquisition and secured financing before construction begins, you’ve already covered 80% of the risk management.
This guide wasn't sugarcoated. It was honest. The eight risk areas exist; they are real, and—if you choose the wrong provider or structure—they can lead to a total loss. Anyone looking to invest in photovoltaics has no choice but to examine these risk factors conscientiously and carefully.
What this guide doesn’t show: With the right provider and the right structure, photovoltaics will continue to be one of the few investment options in 2026 that delivers predictable cash flows over 20–40 years, backed by real economic value and, at the same time, significant tax benefits — Investment deduction (IAB) under Section 7g of the German Income Tax Act (EStG), 40% special depreciation under the Growth Opportunities Act, and 15% declining-balance depreciation through December 31, 2027. This makes photovoltaics a form of investment that few other options on the capital market offer in this combination—a tangible asset with cash flow, the energy transition with tax leverage, and participation in the expansion of renewable energy with a predictable risk profile.
The question isn’t “Yes or no to solar power”—but rather “which provider and what form of investment.” Anyone who compares direct solar investments and direct PV investments in a competitive market will quickly see that the providers differ in exactly three areas: ownership, liability structure, and who is ultimately responsible for any problems.
Anyone considering Logic Energy should know what sets us apart from other providers: mediplan Helm e.K. is a contractual partner with personal, unlimited owner liability under Sections 1, 17, and 19 of the German Commercial Code (HGB)—no share capital limit, no SPV. We actively acquire land for each project, rather than referring investors to a pool of purchased solar power systems. We secure financing before construction begins, rather than passing on the risk of banking market fluctuations to the investor. Our investor model includes a share of inverter-generated revenue, and we provide everything from a single source—planning, construction, operation, and maintenance of the solar power system throughout its entire lifespan.
If, after reading about these eight risk areas, you’re ready to have an in-depth initial consultation, the form at /pv-investor-werden is your first step. We’ll take the time to address any questions you still have—before we talk about numbers.
This article is intended solely to provide general information about the risks associated with photovoltaic investments. It does not constitute investment, tax, or legal advice. The return figures cited are based on empirical data from the Helm Group’s 2024 portfolio or publicly available market data and do not guarantee future results. The profitability of a photovoltaic investment depends on numerous individual and market-related factors. Before making an investment decision, we recommend consulting an independent tax advisor and, if necessary, an attorney. As of May 2026. The contracting party for direct investments is mediplan Helm e.K., with personal liability of the owners pursuant to Sections 1, 17, and 19 of the German Commercial Code (HGB).
FAQ
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Structural risk trumps market risk. Anyone investing in a subordinated loan or a crowd investment with a qualified subordination clause accepts total loss as a realistic scenario in the event of insolvency. Sonneninvest, econnext, Exporo Limespark, and DEGAG WI8 are the most recent examples from 2024–2026. An equity stake in the asset itself is by far the safest structure.
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6–10% per annum before taxes; with targeted tax strategies (IAB under Section 7g of the Income Tax Act, 40% special depreciation under the Growth Opportunities Act), the effective rate is 10–12%. Anyone who sees offers with a guaranteed 8–12% per annum without a structural disclosure should be skeptical—either the assumption is too optimistic, or there is a significant structural risk.
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For existing plants commissioned before February 25, 2025, grandfathering provisions apply under the old grace period rules (3 hours, 4 hours, or 6 hours, depending on the commissioning date). For new installations commissioned on or after February 25, 2025, the market premium is forfeited starting from the first quarter-hour with a negative day-ahead price. Compensation: Extension of the subsidy at the end of the 20-year period pursuant to Section 51a of the EEG with a factor of 0.5.
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Italy offers higher returns (unleveraged IRRs of 6–9%, and 10–13% with 70% debt) and higher capture rates (86–89% in 2024). However: The history of retroactive measures from 2014 to 2022 and the ECJ ruling C-423/23 of January 22, 2026, confirm that Italy is permitted to implement retroactive interventions. Italy has not been a party to the Energy Charter Treaty since 2016. Suitable only for investors with a high risk tolerance and a maximum Italy allocation of approximately 30% in their PV portfolio.
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Direct investment: Ownership of the asset, with priority in the event of insolvency; highest level of security. PV funds (AIFs under the KAGB): Indirect investment through a fund management company; regulated by BaFin. Crowd investment: Typically subordinated loans with a qualified subordination clause; deeply subordinated in the event of insolvency. This structural difference is crucial in the event of insolvency—in 2024, Stiftung Warentest identified 313 insolvent issuers among 2,500 crowd-investing projects.
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Three stand out: First, “guaranteed” returns of over 7% per annum without an explanation of the product structure. Second, advertising that portrays subordinated products as “savings accounts” (which was a key criticism of Prokon). Third, complex interlocking relationships between the originator, operator, and service company, with no external oversight of fund usage. If there are more than three BaFin warning signs: cancel the subscription.
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For a tax-optimized direct investment, a minimum investment amount of approximately €100,000 is advisable in order to take full advantage of the investment deduction and special depreciation and to justify the structural costs. Smaller amounts can only be invested through crowd investments, publicly traded solar equity funds, or solar ETFs with different risk profiles—these options offer less tax leverage but allow for faster market entry.
Sources
Federal Network Agency — Electricity Market Data 2025, EEG Feed-in Tariffs, SMARD Negative-Hour Statistics.
EEG|KWKG Clearing House — Legal Issues Regarding the Negative Price Regulation and Section 51a of the EEG.
Federal Network Agency — Solar Peak Act — Feed-in Tariffs and Negative Price Regulation as of 2025/2026.
Modo Energy — Solar Capture Rate Decline in Germany, 2024–2025.
S&P Global Commodity Insights — Volume-Weighted Average Capture Price for Europe 2024.
Fraunhofer ISE — Long-Term Study on Module Degradation, LCOE Study.
Stiftung Warentest — Ecoligo Restructuring, Crowd-Insolvency Statistics.
BaFin — Warning Signs of Investment Fraud; § 11a of the Investment Act (VermAnlG) — Reports.
Insolvenzbekanntmachungen.de — Case numbers: Sonneninvest (Erfurt Local Court 171 IN 290/24), te Solar Sprint IV (Leipzig Local Court 401 IN 800/22), Exporo Limespark (Stuttgart Local Court 9 IN 1377/24).
BBL Brockdorff Press Release, June 11, 2025 — econnext / Autarq, among others, file for bankruptcy in Charlottenburg.
pv magazine USA June 2, 2025 — Meyer Burger Files for Bankruptcy for Its German Subsidiaries and Under U.S. Chapter 11.
VareseNews, January 22, 2026 — ECJ Case C-423/23 (Secab) on Italy’s revenue levy.
Osborne Clarke — Eligible Areas Under the Decree and the Agriculture Decree-Law.
Official Gazette No. 90/2026 — Law 49/2026 (Decree-Law 21/2026 on Utility Bills) and Incentive Smoothing 2.0.
Federal Finance Court — Pending Case III R 39/25 (IAB for own use).
gesetze-im-internet.de — Section 51 of the EEG 2023, Section 51a of the EEG, Section 7g of the EStG, Section 15(3) of the EStG, Section 15a of the UStG, Section 35 of the BauGB, Section 44 of the BNatSchG.
