Use our online calculator to see your investment return

  1. Calculate payback times, investment returns and other interesting things using our free return calculator, based on a spreadsheet kindly supplied by one of our customers - Thanks, Mr A from Cornwall!

    You make assumptions about inflation and electricity cost, the calculator shows you the returns you will get for a given system size / cost.

    Enter your name, telephone number and email address and we'll email you a link to our online calculator to enable you to calculate your financial return.