Amendment to the Energy Industry Act: What Changes Are in Store for PV Investors?
Excerpt
The 2025 Amendment to the Energy Industry Act (EnWG)—officially titled the Act Amending Energy Industry Law to Strengthen Consumer Protection in the Energy Sector—has been in effect since December 23, 2025. The amendment changes the conditions for PV investors and operators of photovoltaic systems in three specific areas: electricity storage systems are significantly strengthened under building codes and regulations; electric vehicles are treated like stationary storage systems for the first time; and energy sharing is given a legal basis. Anyone investing in PV systems in 2026 should be aware of these new energy law regulations.
-
The 2025 Amendment to the Energy Industry Act (EnWG) (Federal Law Gazette 2025 I No. 347, effective as of December 23, 2025) introduces three key reforms to the Energy Industry Act: Electricity storage facilities receive building permit privileges in rural areas (Section 35 of the German Building Code), a proportional exemption from grid fees for multi-use storage facilities (Section 118(6) EnWG), and a legal framework for energy sharing (Section 42c EnWG). The Bundestag and the Federal Government have thus laid the groundwork for new revenue models centered on PV electricity and self-consumption. For investors, the most important deadline is January 1, 2029 —storage systems must be operational by then to secure a 20-year exemption from grid fees.
Table of Contents
Why the 2025 Amendment to the Energy Industry Act Is Relevant for PV Investors
Vehicle-to-Grid: Electric cars are becoming storage devices under new regulations
Energy Sharing: A New Source of Revenue Starting in June 2026 — With Restrictions
The three most important deadlines and investment opportunities
1. Why the 2025 Amendment to the Energy Industry Act (EnWG) is relevant for PV investors
The 2025 Amendment to the Energy Industry Act is the most comprehensive reform package of energy industry law in years. The Bundestag passed the law on November 13, 2025; the federal government had previously introduced the bill to the cabinet on August 6, 2025. The omnibus bill amends 28 laws and regulations —including the EnWG itself, the EEG 2023, the Building Code, the MsbG, and the Energy Financing Act.
For PV investors and operators of photovoltaic systems, the amendment is crucial for one simple reason: starting in 2026, the value of a photovoltaic system will no longer depend solely on the feed-in tariff. Revenue streams such as storage arbitrage, dynamic electricity rates, and energy sharing are gaining importance—and it is precisely these areas that the energy sector amendment is regulating anew.
What the amendment does not address: The Solar Peak Act—another reform enacted that same year—regulates zero remuneration in the event of negative prices on the electricity exchange, as well as the 60% feed-in limit for system operators without smart meters. This separate law already entered into force on February 25, 2025 (Federal Law Gazette 2025 I No. 51) and applies to all PV systems commissioned on or after that date. What this means specifically for new systems:
The feed-in tariff was reduced to 7.78 cents/kWh as of February 1, 2025 (partial feed-in, systems ≤10 kWp)
If market prices are negative, the compensation is completely forfeited—the estimated loss of revenue for a typical rooftop system installation is approximately €120 per year
To compensate, the reimbursement period will be extended beyond the standard 21 years —the missed hours will be added at the end of the funding period
Solar power systems with a capacity of 7 kWp or more must be controllable by the grid operator—until smart meters and control boxes are installed, a 60% feed-in limit applies
Accordingly, new photovoltaic systems installed after February 25, 2025, are required to have smart meters and control boxes installed. Until this technology is installed, these systems may feed a maximum of 60% of their output into the grid—regardless of how much solar power the system actually produces.
Together, these two sets of regulations define the new regulatory framework for PV investments in Germany and are part of the ongoing transformation of the German electricity system.
2. Battery storage: Three new benefits at once
The 2025 Amendment to the Energy Industry Act (EnWG) establishes a clearly defined legal status for electricity storage systems for the first time—under building codes, energy law, and grid tariffs. A battery storage system is defined as a facility that temporarily stores generated solar power and releases it as needed—for self-consumption, grid injection, or system services. The amendment eliminates the double taxation of stored solar power in multi-use operations, which structurally improves the economic viability of battery storage systems. Flexibility bonuses can be achieved by storing electricity during periods of negative prices and selling it during periods of high prices. The amendment also promotes the direct marketing of electricity on the exchange—without long-term supply obligations. Plant operators and investors planning PV systems with co-located storage benefit from all three changes simultaneously. This eliminates three of the biggest investment barriers of recent years in a single law.
2.1 Building Law: Special Provisions for Photovoltaic Systems with Storage in Outlying Areas (Section 35 of the German Building Code)
Until now, the approval of off-grid energy storage systems has been subject to legal uncertainty. Depending on the state and the relevant authority, this has led to cumbersome zoning procedures and lengthy project timelines. The Building Code did not contain a specific provision for storage systems—a structural problem in German energy law that operators and investors had been pointing out for years.
The amendment added two new subparagraphs to Section 35(1) of the BauGB:
§ 35(1)(11) of the German Building Code (BauGB) (Co-located): Energy storage systems that are physically and functionally connected to an existing renewable energy installation are given preferential treatment. No minimum capacity or operational requirements are necessary.
§ 35(1)(12) of the German Building Code (BauGB) (Stand-alone): Stand-alone storage facilities are exempt if all three of the following conditions are met:
A location no more than 200 meters from a substation (extra-high/high voltage or high/medium voltage) or a power plant with a capacity of 50 MW or more
Rated power of at least 4 megawatts
Maximum floor area: 50,000 m²
For PV investors, No. 11 is particularly relevant in practice: Anyone planning or operating a ground-mounted PV system can now install a co-located storage system without a separate zoning procedure—which significantly reduces planning time and costs. Grid connection for such co-location projects is governed by the KraftNAV and its current amendments for the PV market —building regulations and grid connection are directly intertwined here.
2.2 Overriding public interest (Section 11c of the Energy Industry Act)
The expanded Section 11c of the Energy Industry Act (EnWG) declares the construction and operation of all energy storage facilities to be in the overriding public interest and a driving force behind the energy transition. In permitting procedures, storage facilities are thus given significant weight over competing interests—ranging from nature conservation to pollution control. Exemptions and exceptions are made easier to obtain. This is a direct consequence of the amendment for investors seeking to implement projects in rural areas.
This is a balanced approach, not an absolute priority. Only matters related to national and alliance defense are explicitly excluded. The regulation will remain in effect until the electricity supply is nearly greenhouse gas-neutral (government target: 2045)—a clearly stated goal of the federal government in the context of the energy transition.
2.3 End of double charging for grid fees (Section 118(6) of the Energy Industry Act)
This is the most economically significant amendment to the Energy Industry Act for storage investors. A single change in wording—from “if” to “to the extent that” in Section 118(6), sentence 3 of the Energy Industry Act—makes it possible for the first time to grant a proportional exemption from grid fees for multi-use storage facilities.
What this means for operators and plant owners: Until now, grid fee exemptions applied only to storage systems that feed 100% of the stored electricity back into the same power grid. Energy storage systems that perform multiple functions simultaneously—self-consumption, direct marketing, balancing energy, and grid services—were not covered by the exemption and paid grid fees twice: when drawing power from the grid and when feeding power into the grid.
Other important changes in Section 118(6) of the Energy Industry Act:
Commissioning deadline extended: From August 4, 2026, to January 1, 2029 — Investors have three additional years for implementation and expansion
Bidirectional charging points treated as equivalent: Electric vehicle wallboxes are treated as storage devices under Section 21 of the Energy Efficiency Act (EnFG) — an important step for energy management
Exemption period: 20 years from the date of commissioning
⚠️ Regulatory risk: The Federal Network Agency is working on a new grid tariff system as part of the AgNes procedure. Pursuant to Section 118(6), sentence 12 of the Energy Industry Act (EnWG), the Federal Network Agency may adopt deviating regulations at any time. According to an analysis by FfE and the Environmental Energy Law Foundation, the exemptions are on "thin ice" from a regulatory perspective. The 20-year security applies only to systems that go into operation before January 1, 2029. The strategic investment implications of this reform—and what this specifically means for return planning—are explained in the article on the AgNes reform and its effects on PV investments.
Market context: By the end of 2025, battery storage systems with a total capacity of approximately 25.5 GWh had been installed in Germany—a fivefold increase compared to 2020/2021 (BSW Solar, January 2026). For turnkey large-scale storage systems over 10 MW, system costs are now below €250/kWh (market data Q1 2026).
3. Vehicle-to-Grid: Electric cars are becoming storage devices under regulatory requirements
The 2025 amendment to the Energy Industry Act (EnWG) removes the main regulatory barrier to bidirectional charging. Starting January 1, 2026, electric vehicles will be treated the same as stationary energy storage systems under the law—meaning there will be no grid fees for feeding electricity back into the grid. This is a prerequisite for vehicle-to-grid technology to become economically viable at all.
What the EnWG amendment specifically changes for V2G
As a result of the amendment to Section 118(6) of the Energy Industry Act (EnWG) and the reference to Section 21 of the Energy Promotion Act (EnFG), the following now applies: Solar power or grid power that is fed back into the grid or a building from a vehicle battery via a bidirectional wallbox no longer triggers double grid fees. The Home Energy Management System (HEMS)—that is, the intelligent control of generation, storage, wallbox, and consumption—can thus be used in a legally sound manner for the first time.
In addition, the Federal Network Agency’s MiSpeL procedural rules took effect on April 1, 2026. These standardize:
Accounting for bidirectional charging in the grid
Data exchange between the utility, the supplier, the metering point operator, and the grid operator
Treating charging points as storage units in the power system
Vehicles, Savings Potential, and Smart Meter Rollout
According to the Federal Motor Transport Authority, exactly 2,034,260 battery electric vehicles (BEVs) were registered in Germany as of January 1, 2026 —surpassing the 2-million mark for the first time. In 2025, 545,142 new BEVs were registered (+43.2%). An estimated 225,000 vehicles are already technically capable of bidirectional charging, although true V2G capability (feeding power back into the public grid) is available in significantly fewer models.
Currently available V2G/V2H-capable models (as of Q1 2026):
VW ID. family (ID.3, ID.4, ID.5, ID.7, ID.Buzz with 77-kWh battery) — V2H via DC/CCS
Hyundai Ioniq 5, Kia EV6/EV9 — V2H and V2L
BMW iX3 New Class — First German Commercial V2G Offering with E.ON, Up to €720 Bonus Per Year
Renault 5, Renault 4, Renault Scenic — the only manufacturers with AC bidirectionality
The economic potential: A Fraunhofer study (ISI/ISE, commissioned by Transport & Environment, October 2024) estimates the potential savings at up to €700 per household per year with an optimal combination of a PV system, home storage, and bidirectional charging—corresponding to up to 45% of annual electricity costs. More conservative scenarios range from €200 to €400 per year.
⚠️ Note: Bidirectional DC wallboxes cost €3,000–6,000 for the unit, plus installation. The total investment for a bidirectional charging infrastructure amounts to €4,500–10,000. The smart meter rollout (current penetration rate: 5.5%, as of the end of 2025) is a technical prerequisite for the smart meter gateway and remains the key bottleneck in integration into the power grid.
4. Energy Sharing: A new source of revenue starting in June 2026 — with restrictions
Energy sharing will be enshrined in German energy law for the first time as of June 1, 2026. Section 42c of the Energy Industry Act (EnWG) establishes the legal framework for sharing PV electricity—that is, solar power generated from renewable energy sources—via the public power grid: without a physical direct connection, but with a grid operator acting as an intermediary. Locally generated electricity is consumed locally—this reduces the need for grid expansion and increases the flexibility potential of community energy cooperatives and neighborhood projects. This is a regulatory milestone of the EnWG reform, but not an immediately profitable business model.
What Section 42c of the Energy Industry Act (EnWG) specifically permits for PV systems and energy sharing
Energy sharing is the collective use of renewable electricity via the public distribution grid. A PV investor or plant operator feeds solar power into the grid—participants in the same balancing zone purchase this electricity at prices they negotiate themselves, typically falling between the feed-in tariff and the household electricity rate. The benefit for consumers: cheaper electricity from their neighbors instead of from the general grid.
Key points from the law:
Eligible operators: Individuals, small and medium-sized enterprises (SMEs), community energy cooperatives, and municipalities. Large energy suppliers and large corporations are excluded.
Technical requirement: Quarter-hourly billing via smart meters and smart meter gateways — mandatory for every implementation
Price: Open to negotiation between the provider and the consumer
Full grid fees remain payable—a significant economic disadvantage compared to other EU countries
Timeline: When Energy Sharing Will Launch for Renewable Energy Operators
Effective June 1, 2026: Energy sharing within a balancing zone
Effective June 1, 2028: Across regions within the same regulatory zone
Until January 1, 2029: Transition period for existing customer installations (Section 118(7) of the Energy Industry Act)
The typical selling price for solar power in energy sharing is estimated at 10–15 ct/kWh —somewhere between the EEG feed-in tariff (~7–8 ct/kWh) and the residential electricity price (~30–40 ct/kWh). That sounds attractive. The problem: Full grid fees (averaging ~9.3 ct/kWh in 2026) significantly reduce the margin. Integration into the power grid costs money—and unlike other EU countries, the German government has decided against reducing these costs. Germany has also chosen the narrowest possible geographic radius and—unlike Austria, Italy, and Spain—has completely ruled out premiums or reduced grid fees.
The Citizens' Energy Alliance sums up the implications: The lack of economic viability is the crux of the matter—there are no incentives whatsoever to offset the additional bureaucratic and metering costs.
Industry observers do not expect the market to truly take off until at least 2029, by which time the smart meter rollout will have progressed further, more utility companies will be supporting its implementation, and policy adjustments will have improved its economic viability.
5. The Three Most Important Deadlines and Investment Opportunities
For PV investors and operators of photovoltaic systems, choosing the right time frame is crucial to long-term profitability. The amendment to the Energy Industry Act (EnWG) establishes clear deadlines that serve as strategic benchmarks for expansion and implementation.
Deadline 1 — Commissioning storage systems before January 1, 2029: Anyone who commissions an electricity storage system before January 1, 2029, secures a 20-year exemption from grid fees for electricity fed into and withdrawn from the grid. This is the most important single measure for co-location projects. After this date, the regulation may no longer exist in this form—the Federal Network Agency reserves the right to make adjustments in the AgNes procedure.
Deadline 2 — Plan for co-location now: The combination of building code exemptions (Section 35(11) of the German Building Code), overriding public interest (Section 11c of the German Energy Industry Act), and grid fee exemptions makes PV systems with co-located storage more attractive today than ever before. Anyone planning an open-space PV system should integrate storage into the planning from the very beginning—not as a retrofit option, but as an integral part of the business model. Investments in battery storage are essential for storing electricity, maximizing the self-consumption rate, and reducing dependence on fluctuating market prices. This allows energy management to be optimized for self-consumption and grid stability from the very start.
Phase 3 — Monitor Energy Sharing starting in June 2026: Energy Sharing will be launched under new regulations in June 2026. Investors are advised to adopt a wait-and-see approach: The economic conditions are not yet attractive enough to warrant immediate action. The strategic value lies in planning photovoltaic systems and storage solutions in such a way that Energy Sharing can be activated as an additional revenue source for solar power starting in 2028–2029.
Summary of key data:
117 GW of total installed PV capacity in Germany by the end of 2025 (BNetzA)
25.5 GWh of installed battery storage capacity in Germany by the end of 2025 (BSW Solar, January 2026)
5.6 GW large-scale storage pipeline for 2026–2027 (Modo Energy, February 2026)
Turnkey large-scale storage systems over 10 MW at system costs below €250/kWh (Q1 2026)
2,034,260 BEVs registered in Germany as of January 1, 2026 (KBA)
January 1, 2029 — Critical Deadline for Grid Fee Exemption for Battery Storage Systems
6. Risks that investors should not underestimate
An honest assessment of the EnWG amendment also requires an examination of its weaknesses. The regulatory framework is ambitious—but the implementation risks for plant operators and investors are very real. Those who understand the reform and its limitations will invest with greater clarity and confidence.
An overview of the four key risks:
BNetzA's authority to grant exemptions — the network fee exemption may be modified at any time through regulation
Smart Meter Rollout — A 5.5% penetration rate by the end of 2025 is holding back energy sharing, V2G, and dynamic pricing
Legal Uncertainty Surrounding Customer Installations — May 2025 Federal Court of Justice Ruling Puts New Installations in Neighborhood Projects at Risk
Increasing number of hours with negative prices — 575 hours in 2025, no EEG feed-in tariff, return on investment declines without storage
Risk 1 — The Federal Network Agency’s Authority to Grant Exemptions: The Weak Spot in the EnWG Amendment
Pursuant to Section 118(6), sentence 12 of the Energy Industry Act (EnWG), the Federal Network Agency may establish alternative grid fee regulations. The AgNes procedure (adjustment of the grid fee system) is currently underway. According to legal experts, there is no legitimate expectation of continued protection under the current exemption regulation. This is not a theoretical risk—it is a power explicitly enshrined in law.
Risk 2 — Smart meter rollout and smart meter gateways as a bottleneck
As of December 31, 2025, only about 3.09 million smart metering systems with smart meter gateways had been installed—equivalent to 5.5% of all electricity connections in Germany (BNetzA). Energy sharing, V2G, and dynamic electricity rates all require smart meters and a control box. Without this infrastructure, neither feed-in limits can be optimally controlled nor can the new revenue models be implemented. As early as March 2026, the BNetzA had already initiated 77 proceedings against non-compliant grid operators and metering point operators. As long as the rollout stalls, the practical implementation of these business models remains limited.
Risk 3 — Legal uncertainty regarding customer-owned PV systems in the neighborhood
In its ruling of May 13, 2025 (Case No. EnVR 83/20), the Federal Court of Justice (BGH) significantly narrowed the definition of a “customer-owned system.” Multi-building tenant electricity and neighborhood projects are at risk of being classified as regulated distribution networks—with significant implications for operators and companies that use their own PV systems for tenant electricity. The transition period until January 2029 protects only existing systems—for new systems, there is complete legal uncertainty. Twenty-seven industry associations are calling for a permanent reform of energy law.
Risk 4 — Increasing number of negative-price hours for renewable energy
In 2025, there were approximately 575 hours of negative electricity prices on the power exchange (FfE/EPEX SPOT 2025). Since February 2025, the EEG feed-in tariff for new PV systems has not applied during these hours. Those who do not actively plan dynamic revenue strategies with battery storage are sacrificing returns. At the same time, the risk of grid overload during periods of high feed-in from renewable energies remains real—the market value of solar power in 2025 averaged only 4.508 ct/kWh for the year.
7. Conclusion: What Needs to Be Done Now
The 2025 Amendment to the Energy Economy Act (EnWG) establishes the regulatory framework for a new generation of PV business models. Three recommendations for action can be derived for investors and plant operators:
First: Plan PV systems with storage immediately and integrate co-located storage into the original project plan—not as a retrofit option. The combination of building code privileges, overriding public interest, and grid fee exemptions is uniquely advantageous. The deadline of January 1, 2029, for the 20-year exemption is real. Implementing this today means 20 years of guaranteed savings on electricity costs.
Second: Monitor V2G and energy sharing strategically, but do not count on them as immediate drivers of returns. The regulatory framework is in place—the economic infrastructure (smart meters, smart meter rollout, V2G-enabled wallboxes, standardized grid operator processes) is growing. Positioning for 2028–2029 makes more sense than investing immediately in infrastructure that is not yet mature.
Third: Take the Federal Network Agency’s authority seriously. Anyone investing in large-scale storage should factor in scenarios where grid fee exemptions are reduced or eliminated entirely. The economic viability of a co-location project with renewable energy should be demonstrable even without this advantage—it is a bonus, not a basis for planning.
For those who want to delve deeper: The KraftNAV amendments and their implications for grid connection add the technical dimension of grid connection to the building code framework—the two sets of regulations are directly interlinked when it comes to co-location projects.
This article is intended solely for general informational purposes and does not constitute investment, tax, or legal advice. Return figures are based on historical data from the Helm Group and are not a guarantee of future results. For advice tailored to your individual situation, please consult a licensed advisor. All information is provided without warranty. As of April 2026.
About PV Investments → The 2025 EnWG Amendmentfundamentally changes the return structure of PV investments—especially for projects with integrated battery storage.
It’s rare to see three changes at once. Building codes, grid fees, and energy sharing: The amendment to the Energy Industry Act provides thelegal framework thatnow makesPV systemswith energy storage more viable than ever before. Photovoltaic systems with co-located storage benefit directly from streamlinedpermitting processes, reducedgrid fees, and a clearrequirement for direct marketing for systems 25 kWp and larger . But laws alone do not build a system or guarantee a return on investment. Logic Energy designs and implements PV systems that are tailored to the new regulatory framework from the very beginning—co-located storage, long-term revenue sharing, and technically and legally sound. Take advantage of the current regulatory climate: Contact us, and we’ll calculate your individual investment potential free of charge.
FAQ
-
The 2025 Amendment to the Energy Economy Act (EnWG) is a omnibus bill that amends 28 laws and regulations—including the EnWG, the Renewable Energy Act (EEG) 2023, the Building Code (BauGB), and the Small Business Act (MsbG). It was passed by the Bundestag on November 13, 2025, approved by the Bundesrat on November 21, 2025, and has been in effect since December 23, 2025 (Federal Law Gazette 2025 I No. 347).
-
Battery storage systems now have three new advantages: for the first time, their own building code privileges in outdoor areas (Section 35(1)(11) and (12) of the German Building Code (BauGB)), the status of “overriding public interest” in approval procedures (Section 11c of the German Energy Industry Act (EnWG)), and a proportional exemption from grid fees for multi-use storage systems (Section 118(6) of the German Energy Industry Act (EnWG)). The commissioning deadline for the 20-year exemption has been extended to January 1, 2029.
-
Energy Sharing (Section 42c of the German Energy Act) will allow the sale of PV electricity via the public distribution grid to participants in the same balancing zone starting June 1, 2026. Prices are freely negotiable and typically range between 10 and 15 cents/kWh. However, full grid fees (~9.3 cents/kWh) remain payable. A broad market is realistic no earlier than 2029.
-
Yes. Due to the amendment to Section 118(6) of the Energy Industry Act (EnWG) and the reference to Section 21 of the Energy Transition Act (EnFG), bidirectional charging points will be treated the same as stationary battery storage systems for regulatory purposes starting January 1, 2026. Electricity fed back into the grid from vehicle batteries will no longer trigger double grid fees. Starting April 1, 2026, the MiSpeL process rules will standardize net metering.
-
The deadline for commissioning was extended by the EnWG amendment from the original date of August 2026 to January 1, 2029. Anyone who commissions a storage facility by that date will be eligible for a 20-year exemption from grid fees for both charging and discharging electricity—provided that the Federal Network Agency (BNetzA) does not issue any different regulations in the ongoing AgNes proceedings.
-
The greatest regulatory risk is the Federal Network Agency’s authority to grant exemptions (Section 118(6), sentence 12 of the Energy Industry Act). The slow rollout of smart meters (5.5% penetration rate by the end of 2025) is delaying the implementation of energy sharing and V2G. Legal uncertainty regarding customer-owned systems following the Federal Court of Justice ruling in May 2025 affects neighborhood projects. An increase in negative price hours (575 hours in 2025) is weighing on direct marketing without storage.
-
In part. The building code exemption applies to new storage projects. The grid fee exemption can also be applied to existing systems if a new storage facility goes into operation by January 1, 2029. Energy Sharing is available to all renewable energy system owners—regardless of the PV system’s commissioning date—provided the technical requirements (smart meter, net metering capability) are met.
References
Bundestag — Measures to Protect Consumers from Electricity Price Fluctuations Approved, November 13, 2025
pv magazine — Federal Council Approves Amendment to the Energy Industry Act, November 21, 2025
Gleiss Lutz — Privileged status for battery storage systems in unzoned areas: New subsections 11 and 12 of Section 35(1) of the BauGB, November 2025
Gleiss Lutz — Energy sharing – joint use of renewable electricity under the new Section 42c of the Energy Industry Act, December 2025
FfE — New Grid Fee Exemptions for Storage Systems and Charging Points – Are the Exemptions on Shaky Ground?, December 2025
BSW Solar — Battery storage capacity to increase fivefold within 5 years, January 12, 2026
Modo Energy — Report on the Expansion of Battery Storage in Germany: Capacity Growth to Reach a Record High in 2025, February 2026
Federal Motor Transport Authority — The number of all-electric vehicles registered in Germany exceeds the two-million mark for the first time, 2026
Baker Tilly — Energy Sharing: New Legal Framework in the Energy Industry Act (EnWG), 2025
Citizens' Energy Alliance — Energy Sharing at Last – Unfortunately, Only Half-Hearted, November 21, 2025
Transport & Environment / Electrive — Fraunhofer Assesses the Economic Potential of Bidi Charging Stations, October 2024
Tengelmann Energie — 2025 Amendment to the Energy Industry Act: What Businesses Need to Know Now, 2025
Bittner+Krull — Smart Meter Rollout 2026: iMSys Between Targets and Reality, 2026
Photovoltaik.sh — Energy Sharing for Solar Power – Opportunities and Framework Conditions Starting in June 2026
Helm Group — Portfolio Return Data 2024 — Internal Project Data
