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Find answers to common questions about solar systems: how many panels you need, what's included in a solar kit, pricing, subsidies, installation and ROI in the EU and worldwide.

Everything you need to know about complete solar system kits for homes: components, pricing, battery options, installation tips, and efficiency.

Learn more about subsidies and incentives for solar systems in Germany, Austria, Switzerland, Poland, Spain, Portugal, Brazil, the USA, and other countries.

How Sun Ration collects, uses and protects your personal data.

Terms of using the Sun Ration solar calculator.

Learn how to accurately calculate the number of solar panels for your home or business based on consumption, panel power, and real conditions.

Calculate how many solar panels you need to charge your electric vehicle.