Running costs, payback & emissions

Energy & Sustainability calculators

Calculators for solar payback, appliance running costs and energy economics — you supply your own local tariff, so the answer is right wherever you are.

• Solar Payback Calculator
  Year-by-year cashflow with degradation and tariff escalation — payback, lifetime saving, LCOE and IRR from your own local numbers.
• Appliance Running Cost Calculator
  Energy, cost and carbon for one appliance — with the standby draw and duty cycle that most calculators leave out.