Battery Storage for Agriculture
Battery Storage for Farms & Agricultural Businesses
Use solar electricity day and night – from 10 kWh systems to more than 200 kWh. Backup-power capable and suitable for retrofitting many existing solar installations.
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When Older Feed-In Support Ends, Your Own Solar Power Becomes More Valuable
Many German agricultural solar systems installed in the early 2000s are now reaching the end of their 20-year EEG support period. The historically high guaranteed feed-in tariffs then expire, while remuneration for newly exported electricity is much lower.
Self-generated electricity can remain valuable when it is used directly on the farm. Battery storage lets you keep daytime solar energy for later use. With a compatible energy-management system and a dynamic electricity tariff, the battery can also charge during low-price periods and reduce grid purchases during expensive hours.
The concept scales from a retrofit battery alongside an existing solar system to large installations with several hundred kilowatt-hours of storage for businesses with high consumption.
Check Your OptionsWays to Retrofit StorageWhy Battery Storage Can Be Especially Useful on a Farm
Electricity Around the Clock
Milking, cooling, ventilation, heating and other loads can run day and night, often creating a stronger match between generation and consumption than in a typical home.
Large Roof Areas
Barns and agricultural buildings can generate more solar electricity during the day than is needed immediately. A battery stores part of that surplus for later use.
Backup Power for Critical Equipment
Power cuts can affect milking, ventilation, cooling and control systems. A correctly designed backup-capable storage system can keep selected loads supplied.
Potential Tax Advantages in Germany
Depending on the business and investment, §7g EStG can allow an investment deduction of up to 50% of expected eligible costs when the statutory conditions are met, including almost exclusive business use. Obtain tax advice for your individual case.
Three Routes to the Right Storage System
The right solution depends on your grid connection, consumption profile and existing solar installation. The existing solar inverter can often remain in place, but it does not have to.
Retrofit or Build New – Victron
The existing solar installation can continue operating. An AC-coupled Victron battery inverter/charger and battery are added alongside it. The same architecture can also be used for new systems, with backup-power capability and modular expansion.
Increase Flexibility – Hybrid Systems
Compatible hybrid systems from manufacturers such as Solis or SolaX can coordinate solar generation, battery charging and selected dynamic-tariff strategies. The exact functions depend on the inverter, battery, tariff and energy-management setup.
Large Systems – 200+ kWh Possible
Higher consumption requires more storage and power. The available grid connection must match charging and discharging requirements; larger projects can require reinforcement, a new connection or a transformer in coordination with the grid operator.
Economics & Technical Requirements
Storage cost depends strongly on capacity, power, installation and project scope. The guide values below are from the German source as of August 2026 and are not binding quotations. Profitability must be calculated from the actual load profile, tariff, solar generation and investment cost.
Guide Investment per kWh
Retrofit storage 10–30 kWh: approx. €600–900/kWh.
Commercial storage from 100 kWh: approx. €400–600/kWh.
Large storage from 500 kWh: approx. €300–500/kWh.
Larger systems can reduce the cost per kWh.
Where Savings Can Come From
Higher solar self-consumption.
Peak-load reduction where demand charges apply.
Dynamic-tariff optimisation with compatible equipment.
Actual payback varies by project and is not guaranteed.
Grid Connection
Smaller AC-coupled retrofit systems can often use the existing connection. Larger three-phase storage systems require a grid connection sized for their charging and discharging power. Very large projects can require connection reinforcement or a dedicated transformer.
Space & Technology
Small and medium systems are normally installed in a suitable dry technical area or cabinet; larger systems can use outdoor cabinets or container solutions. Fire protection, local electrical requirements and grid-connection approval become increasingly important as system size grows.
What Matters for Agricultural Battery Storage
Backup Power & Black Start
Modular Expansion
High Cycle Life
Suitable Installation Location
Prioritised Backup Loads
Storage System Options
Victron AC-Coupled Storage
Flexible retrofit architecture · low-voltage battery options · backup-capable when designed accordingly
SolaX / Solis Hybrid Storage
Hybrid architecture · energy management · dynamic-tariff functions depending on system
BYD / High-Voltage Storage
Scalable battery systems for larger projects
Commercial & Container Solutions
Available on request
Funding & Tax Considerations in Germany
For eligible investments, §7g EStG can permit an investment deduction of up to 50% of expected acquisition or production costs. The asset must meet the statutory conditions, including being used exclusively or almost exclusively for business purposes during the required period; German tax guidance treats this as at least 90% business use. Eligibility also depends on further business and investment conditions. This is not tax advice—have your individual situation checked by a tax adviser. Financing and regional support programmes can also change over time.
Discuss the Technical ProjectPlan Battery Storage for Your Farm
Get a technically matched recommendation based on your consumption data, existing solar system, required backup loads and available grid connection.
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