Tools

Answer a few questions about your home and get a plain answer back. Free, with nothing to sign up for.

• What will it run?Power station sizer

  Choose your appliances and how long a cut, and see which power stations last.

• What stops first?Lights Out

  Nine quick questions about your home, and what goes off at once in a power cut.

• Generator or power station?Which backup power?

  Six questions and an honest answer about which backup power suits you.

• Would plug-in solar pay?Plug-in solar calculator

  Your region, direction and shade: what a kit would make and save a year.

• How much water to store?Water calculator

  Your household and how many days: the litres, in containers or two-litre bottles.

• The 72-hour kitChecklist

  A printable checklist, with water worked out for your household.

For what's happening now (power cuts, fuel prices and the energy price cap), see Live data, or find the cheapest fuel near your postcode.