Free Solar Calculators & Tools

Calculate your potential savings, payback period, and system size based on your electricity usage, roof orientation, and location.

Find the right battery size for your home. Calculate how much storage you need based on your usage patterns and solar generation.

Compare your electricity costs with and without solar over 25 years. See the true cost difference with rising energy prices.

Calculate how much of your EV charging can come from solar panels. Compare costs vs public charging and petrol.

Check if your roof is suitable for solar panels. Assess orientation, pitch, shading, and structural considerations.

Compare solar panel brands side-by-side. See efficiency, warranties, prices, and performance ratings for top manufacturers.

Calculate your Smart Export Guarantee earnings. Compare tariffs from different suppliers and estimate annual income.

Compare investing in solar panels versus putting your money in a savings account. See which gives better returns over time.

Calculate your environmental impact. See how much CO₂ you’ll save over the lifetime of your solar panel system.

Got a quote? Check if it’s fair. Compare your quote against UK market prices and see if you’re getting good value.

Already have solar? Track your actual generation against expected output. Identify if your system is underperforming.

Fine-tune your solar setup. Calculate the optimal balance of panels, battery storage, and export to maximise your returns.

Calculate combined savings from solar panels and a heat pump. See how they work together to slash your energy bills.

Calculate returns on rental property solar installations. Factor in tenant benefits, rent increases, and EPC improvements.

Estimate how trees, buildings, and chimneys affect your solar output. Get recommendations for optimisers vs microinverters.