Free Solar Panel Tools & Calculators

Calculate your exact payback period using MCS MIS 3002 methodology and Ofgem Q1 2026 electricity rates. Adjust for region, system size, shading, and battery storage.

Is solar a better investment than the S&P 500 or FTSE 100? Compare 25-year returns with real IRR analysis, break-even year, and electricity inflation modelling.

See how solar panel quality affects output over 30 years. Compare premium (0.25%/yr) vs budget (0.8%/yr) degradation rates and the £ difference in lifetime yield.

How many solar panels do you need to charge your electric vehicle? Select your car and mileage to get a precise system size recommendation.

Input details from your solar quote. Our checker flags workmanship warranty gaps, inflated cost-per-watt, dodgy inverter brands, and roof warranty conflicts.

Enter the promises from a solar ad or door-to-door sales pitch. Get an instant "Scam Probability Score" and learn what the fine print really means.

Exposes the "invisible load" of inverter standby consumption — up to 547 kWh/year that most installers never mention. Correctly size your battery bank.

Test yourself against the hard realities of UK solar costs, grants, and payback. Instant scoring with educational feedback — shareable results.

Live comparison of Smart Export Guarantee rates across major UK energy suppliers. Track which tariffs are rising, falling, or under legislative threat.

Input your Octopus or OVO time-of-use tariff. See exactly how shifting solar energy from midday to peak evening hours changes your annual savings.

The green transition has a dark side. See projected UK solar panel waste accumulation to 2050 and the recycling infrastructure gap that needs to close.

Building your own solar system? Price up the essential safety tools — multimeter, hydraulic crimper, torque wrench — with UK supplier links and safety guidance.

Renting or can't install panels? Find active community solar and shared ownership schemes in your area. Designed for renters and low-income households.

Enter your UK location and see how much solar energy your region is generating today — translated into homes powered, CO₂ avoided, and trees planted.

See why solar costs more in some UK regions than others. Interactive breakdown of permitting, grid connection, and overhead costs by local authority.

Could your local reservoir host floating solar panels? Interactive UK map of floatovoltaics potential on reservoirs and industrial lakes.