Calculators

Energy Calculators

Free tools to help you make informed decisions about energy investments and savings.

Battery Payback Calculator

Calculate how long it takes for a home battery to pay for itself based on your solar production, consumption, and electricity prices.

See how much you save by heating water during the cheapest electricity hours with a Shelly smart plug.

Calculate how much you save by scheduling any electrical device to run during the cheapest electricity hours.

Calculate how much CO₂ emissions you reduce by scheduling electricity consumption to cleaner hours.

Compare fixed and stock electricity prices to find out which contract type saves you more money.

Compare the total cost of owning an electric car vs a petrol car — fuel, maintenance, and payback period.