Calculators

Calculators that show their working. They share the same published assumptions, listed on each page.

• What size power station do I need?

  From your appliances, hours and days off-grid to the rated capacity, continuous and surge watts and solar input to look for.

• Power station runtime calculator

  How long it will run your appliances, whether the inverter copes with start-up surges, and how long solar takes to recharge it.

• Solar charging time calculator

  How long panels take to charge a power station in each UK month, with clipping and voltage checks.