Free Solar Tools

Interactive calculators and visualisations for UK solar. No email required — just answers.

Financial

See exactly where your electricity bill goes with solar

Calculate savings from charging your battery on cheap off-peak rates

Instant estimate of solar savings, payback, and 25-year return

See how a battery shifts solar from export to self-use

What percentage of your electricity comes from your own roof?

See how your panel output changes over 50 years

Find the best solar panel angle for your roof and the seasons

Visualise how inverter sizing affects your solar output

Check which UK solar grants and schemes you may qualify for

Build your own solar system in 2 minutes — we will use your postcode, roof details, and usage to give you real numbers, not averages.