Solar tools
Start with the question you have today. Existing solar owners can get a low-friction seven-day forecast; households considering panels can use our installation estimate; and battery shoppers can compare hourly flows.
Already have solar panels?
Enter a postcode and your best-ever solar day to estimate how much your own panels could generate over the next seven days, including hourly curves and the strongest period tomorrow.
Get my solar forecastConsidering solar?
Choose an exact property, explore roof-specific system layouts where detailed data is available, validate generation with PVGIS, and test bill savings, export income and payback.
Check my roof for solarConsidering a battery?
Model 8,760 hours of generation and household demand with real battery capacity, power and losses, then compare imports, exports, annual saving and simple payback.
Model a solar batteryA household that already has panels can calibrate a forecast from real output in seconds. A household considering solar needs a different answer: roof space, likely system size, annual generation and financial assumptions. A battery decision needs hourly overlap between those two sides, plus capacity and power limits. Keeping the three journeys separate avoids turning any one of them into a long questionnaire.
If you want a quick estimate without entering an address, use the solar panel cost and payback calculator. For a property-specific result, choose the solar roof calculator above.
Written by
Rob Gibbs
Hi, I'm Rob, and I run Energy-Review.co.uk. I initially started this project in 2018 when I was looking to switch energy suppliers and found there wasn't a website that provided simple, data-backed reviews on all the suppliers available. Since then, I have spent a lot of time (too much, some may say!) looking at all publicly available data about each supplier and writing reviews using this information. These reviews are updated as regularly as possible, and any data is backed up by a source where necessary. I have also started writing guides on various energy-related topics, which hopefully you will find useful. If you find any issues, please use our contact form to let us know.