Calculate residential solar PV return on investment under the EEG: 20-year guaranteed export rates, self-consumption savings, battery storage, and payback periods.
Renewable Energy Sources Act (EEG) & Zero VAT Rule (§ 12 (3) UStG & § 3 No. 72 EStG)
e.g. 10 kWp for an average single-family home
German average: 950–1,050 kWh per kWp annually
Typical 4-person household: approx. 4,000 kWh/yr
Current utility tariff rate (approx. 36–42 cents/kWh)
Includes installation & battery (0% VAT)
Full capital return achieved in: 2.001,8 € Ertrag pro Jahr
Under German tax law, rooftop systems up to 30 kWp enjoy 0% VAT on hardware and installation, as well as full income tax exemption on power generation.
This calculator is built on deterministic mathematical and algorithmic models. Results are simulations for educational and estimation purposes and should not be used as official or legally binding records.
Calculate motor vehicle tax under KraftStG: Displacement base (€2.00 petrol / €9.50 diesel), tiered CO2 scale above 95 g/km, and EV exemption.
Heating lifecycle cost comparison under GEG rules: Seasonal performance factor (COP/JAZ), KfW 458 federal subsidies (up to 70% grant), and 10-year operating costs.
Count words, characters (with/without spaces), sentences, paragraphs, reading and speaking times.