Impact

What melts does not come back. Neither does curtailed power.

In 2024, Germany curtailed 9.4 terawatt hours of renewable electricity. Wind farms switched off, solar disconnected. Energy that was there and is gone.

Source: Bundesnetzagentur / SMARD, congestion management data for 2024. The glacier stands for what is irreversible. It is an image, not an equation.

The mechanism

How a battery can avoid CO2.

On a windy afternoon, Germany often produces more renewable electricity than the grid can absorb. Prices fall, turbines are told to stop and the surplus is lost. A battery charges in exactly those hours.

In the evening, when the wind has dropped and demand rises, the marginal power plant is usually gas-fired. A battery that discharges then displaces that plant. This shift, from surplus hours into gas hours, is the mechanism behind storage-related CO2 savings.

Whether a specific battery achieves it depends on how it is dispatched. That is why we publish potentials with their method, not promises.

The calculation 330,000 t CO2

per year is what the arithmetic gives for our eight projects, if all of them are built and if their 2.46 GWh of storage shift one full cycle per day from renewable surplus into hours that gas would otherwise serve. It is a model result, not a forecast and not a target. We derive no commitment from it. The factor is Fraunhofer ISE's: roughly 0.37 tonnes of CO2 per megawatt hour shifted.

Calculation: 2,455 MWh of storage capacity across all eight projects x one full cycle per day x 365 days x 0.37 t CO2 per MWh, rounded down from 331,500 t. Factor: Fraunhofer ISE, position paper "Batteriespeicher an ehemaligen Kraftwerksstandorten" (Bat4CPP), May 2022 (shifting 53 GWh per day avoids about 20,000 t CO2 versus gas-fired generation); consistent with Umweltbundesamt emission factors for gas plants. This is a calculated potential and not a commitment. Actual dispatch depends on market conditions. We derive no environmental claim about any individual project from this figure.

The system case

Four figures from public studies.

They come from different models and different scenarios. They point in the same direction, but they cannot be added into one total. Each stands on its own, with its source.

9.4 TWh

of renewable electricity was curtailed in Germany in 2024, around 3.5 percent of all renewable generation. This is the loss that storage and flexibility are built to reduce.

Source: Bundesnetzagentur / SMARD, evaluation of congestion management for the year 2024.

180 GWh

of stationary battery storage is what Fraunhofer ISE calculates Germany needs by 2045, with roughly 100 GWh needed by 2030. That is a multiple of what is installed today.

Source: Fraunhofer ISE system study (REMod reference scenario), documented in the Bat4CPP position paper, 2022. The German grid development plan points in the same direction: 61 GWh by 2037 and 136 GWh by 2045 (NEP 2037/2045, second draft, scenario C).

3.9 bn EUR

per year in system cost relief from 20 GW / 80 GWh of additional battery storage, alongside roughly 55 percent less market-driven curtailment and almost 70 percent fewer hours with negative power prices.

Source: Fraunhofer IEE, short study "Die nächste Phase der Energiewende: Flexibilität", July 2026, commissioned by the industry associations BEE, BSW-Solar and BWE. Simulation of four-hour storage systems over the period January 2025 to May 2026.

6.2 Mt CO2

avoided in the year 2030 if the market-driven battery build-out continues, because 9 GW of additional gas-fired power plants would not need to be built.

Source: Frontier Economics, "Wert von Grossbatteriespeichern im deutschen Stromsystem", December 2023, commissioned by BayWa r.e., ECO STOR, enspired, Fluence and Kyon Energy. Day-ahead market modelling, assumed build-out path of 15 GW / 57 GWh by 2030.

Our contribution

What our projects could contribute.

The industry likes to translate storage into households. We do it too, but we show the arithmetic first.

We take a project's usable storage energy and divide it by the average electrical load of a household. Based on BDEW annual consumption figures, a two-person household draws about 0.33 kW on average. The result is always a calculated equivalent, always stated with a duration and never a claim of continuous supply.

For the table below we use two hours, the length of a typical evening peak.

Project	Status	Power	Storage	Calculated equivalent, two hours
Langenfeld	In development	350 MW	800 MWh	approx. 1.2 million households
Undisclosed site	In development	300 MW	600 MWh	approx. 900,000 households
Undisclosed site	In development	100 MW	400 MWh	approx. 600,000 households
Salzbergen	In development	95 MW	225 MWh	approx. 340,000 households
Sonneberg	In development	95 MW	200 MWh	approx. 300,000 households
Undisclosed site	In development	20 MW	40 MWh	approx. 60,000 households
Lauta	In realization	40 MW	100 MWh	approx. 152,000 households
Plettenberg	In realization	30 MW	90 MWh	approx. 136,000 households

Method: households = usable storage energy in kWh divided by (0.33 kW × 2 h). The 0.33 kW average load is derived from the BDEW annual consumption of a two-person household (2,890 kWh) divided by 8,760 hours, rounded conservatively upward. Example: 800 MWh × 1,000 / (0.33 kW × 2 h) = approx. 1.2 million households for two hours. Values are rounded calculated equivalents, not statements of continuous supply. Project figures reflect the current planning status and may change through permitting.

On site

What we commit to on the ground.

No abstract pledges. These are the four things a landowner or a municipality can hold us to.

Land use and planting

Battery storage is a quiet, low-rise use of land. Site layout and perimeter planting are part of the permit design of every project, worked out with the local authority rather than promised in a brochure.

Noise limit by design

German immission law (TA Lärm) sets binding noise limits at the nearest residence. We meet them through plant design: equipment choice, spacing and orientation are fixed in the permit before construction starts.

Full decommissioning

Every project carries a complete removal obligation at the end of its operating life. The installation is dismantled and the site cleared. This is secured contractually, not offered as a goodwill statement.

Lease, not purchase

We lease land long term instead of buying it. Ownership stays where it is, the lease provides steady income for decades and the land returns to its owner after decommissioning.

Every number on this page has a source and a year.

If a figure seems too round or too convenient, ask us about the method behind it. We will show the arithmetic.