A solar proposal is a stack of assumptions wearing a number. Change one and the whole thing moves — which is why two quotes for the same roof can look nothing alike, and why "saves you $60,000" means very little on its own.
This guide tells you what to look for. Our tool does the looking — it takes your numbers, runs them through our own model, and tells you what's off, what your estimated savings come to, and the exact questions to put to your installer. $49.99, one time.
Check my quote → You don't need it to use this guide. Everything above is free and always will be.