Question 1

How much does a solar system cost?

Accepted Answer

A typical PV system for a single-family home (5–10 kWp) costs between €7,000 and €20,000 including installation and inverter. A battery storage system adds €5,000–€15,000. Use our calculator for a more precise estimate based on your roof area.

Question 2

Is a solar system worth it?

Accepted Answer

In most cases, yes. With current electricity prices of approx. €0.34/kWh and a feed-in tariff of 8.03 ct/kWh, a PV system typically pays for itself in 8–13 years. Over 25 years, the return is often 5–8%.

Question 3

How much electricity does a solar system produce?

Accepted Answer

In Germany, a solar system produces approx. 850–1,050 kWh per kWp per year depending on location and orientation. A typical 10 kWp system delivers 8,500–10,500 kWh annually – enough for a 4-person household.

Question 4

Why don't I need to register?

Accepted Answer

OpenSolarCheck calculates everything directly in your browser. Your data never leaves your computer – there is no server storing it. That's why we don't need your email or phone number.

Question 5

How accurate is the calculator?

Accepted Answer

The calculation is based on EU PVGIS satellite data and the HTW Berlin model. The results are good estimates but do not replace professional on-site planning that considers local shading and roof statics.

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