Solar guides
Understand the inputs, compare scenarios and check the limits behind a result.
These guides explain practical workflows using illustrative numbers. Start with the input method, then use the calculators with your own measurements or records.
How to Read a Solar Quote Without Mixing Up the Numbers
Compare capacity, estimated production, savings, and simple payback.
Read guide →Compare Solar Proposals by Their Assumptions, Not Just Payback
Compare quoted capacity, estimated production, energy value and net cost while keeping roof design, tariffs and financing questions separate.
Read guide →