Get your €500 grant in 5 easy steps:

Disclaimer: Ostrom assumes no liability for the accuracy of the information. We recommend that you conduct your own research and carefully check the links provided.

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Step 1: Are you eligible?

You are eligible for funding if your main residence is in Berlin.

In addition, you must be a tenant of an apartment or your property or a lessee of a small garden or recreational garden.

You can find more detailed information here:

Step 2: Apply for funding

The funding must be applied for before purchase. You should only purchase your mini solar system once your funding application has been approved.

You need the following documents for your funding application:

  • Identity card or passport with registration certificate

  • Proof of ownership of the property (extract from the land register, rental agreement for the apartment or lease agreement for the garden).

To apply for funding, you must fill out the application form "Module E". You can find the digital version here:

Step 3: Buy your balcony power plant

Choose the right mini solar system for you. The decisive factors are where you want to place it (balcony, garden or flat roof) and how many watts you need.

Step 4: Register your balcony power plant

As a new solar system owner, you only have to register your mini solar system in the market master data register.

Register with the Federal Network Agency here:

Since April 26, 2024: Registration with a network operator is no longer necessary .

Step 5: Request a payout

Once you have purchased your mini solar systemand installed it at the location you specified, you can now apply for payment of your subsidy in the electronic application system.

You will need the following documents:

  • Invoice for the plug-in solar device

  • Proof of payment (printout of individual transactions, bank statement)

In addition, you must confirm that you have registered your power plant in the market data register of the Federal Network Agency.

  • 1. Apply for funding

    Apply for funding from the IBB Business Team and save up to 500€ when purchasing a mini solar system.

    Apply for funding 
  • 2. Order a mini solar system

    Where can you get the most sun? Installation on the balcony or in the garden? Find the balcony power plant that best suits you and your needs.

  • 3. Register mini solar system

    Register the mini solar system within 30 days of installation. Quickly and easily in the market master data register!

    For registration 

Good for the climate and your wallet!

Let the sun work for you! Your mini solar system produces climate-neutral electricity for you and thus reduces your electricity costs.

Easy DIY installation!

All sets from our partner brands come with premium brackets that are tailored to your desired installation location. This makes the solar modules easy and safe to install.

Appropriate storage

Guaranteed to use the solar power you produce yourself when you need it - whether during the day or at night.

Simple plug & play concept thanks to 2in1 battery and DC distributor allows easy installation in 5 minutes.

To the storage

A mini solar system is not enough for you?

Choose your solar system conveniently online and benefit from quality-tested installation by experienced installers from your region. Buy or rent? Both are possible, you decide!

Learn more

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