Tools
Calculators
Tools intended to answer a decision rather than generate a lead: each shows its assumptions, gives ranges rather than false precision, and is willing to conclude that you should not buy anything.
Prototype tools — every figure is illustrative and unverified
What should I install first?
Illustrative prototypeSix steps covering your home, car, tariff and roof. Returns a ranked plan, indicative sizing and a payback range — all produced by a placeholder model, so the figures are illustrative and unverified.
Start the calculatorHome charging cost calculator
In developmentCompare pence per mile across time-of-use tariffs, public rapid charging and solar-assisted charging.
Use the whole-home calculator meanwhileSolar and battery payback
In developmentModel self-consumption, export value and battery cycling against your actual half-hourly consumption profile.
Use the whole-home calculator meanwhileHeat pump running cost
In developmentEstimate seasonal performance and annual cost against your current gas or oil spend, at your real tariff.
Use the whole-home calculator meanwhile