Systems drift — shading grows, panels dirty, inverters fault — and the bill just quietly stays high. Solar Check compares your real output against what a healthy system at your address should make, using satellite sunlight data for your exact postcode.
On the 1st we email what your system should have made. You type one number, we log the verdict and the trend — and tell you the month something slips, not a year later.
Solar Check compares your reported output to satellite-modelled expectations for your postcode. It's a guide, not a substitute for an electrician. Expected figures assume a working, unshaded install; verdicts use ranges because weather varies. Solar Check is a SolarBill product. Free solar calculator