Work out the savings, payback time and 25-year benefit of a rooftop solar system from its size, cost and your tariff.
Assumes your tariff stays the same; tariffs usually rise, which improves the result.
Costs vary by size and quality; enter your own quote per kW and any subsidy you will receive.
The time your savings take to cover the net cost. Many homes see it in 4–7 years.
No — keeping the tariff constant is conservative, since tariffs usually rise.
No. Everything is worked out in your browser and nothing you type is sent to a server.