Tools

Work out your own situation, with the sources attached. Nothing for sale, no email required.

• What size home battery fits you

  Three limits decide the size, and the market talks around them. Work out what the step above the right size actually returns.

• What your electricity really costs, fixed and dynamic

  Delivery rate, markup, energy tax and VAT in the order the bill adds them, with measured hourly prices for the dynamic contract and the tax year named.