Solar pays off only when the numbers and the roof’s sun exposure line up — and that is easy to get wrong. These 8 field-tested tips cut straight to what makes the biggest difference for solar installers and homeowners — and at the end you will find a free app that makes following them effortless.
1. Face arrays for the best year-round sun.
2. Account for shading from trees and chimneys.
3. Right-size the system to the actual bill.
4. Check current rebates before quoting.
5. Model payback, not just upfront cost.
6. Use real usage data when you have it.
7. Revisit after any roof or tree change.
8. Verify figures with official sources.
Put These Tips on Autopilot
Knowing the tips is half the battle — doing them consistently is the other half. Solar & Shading Pro keeps the routine, does the calculations and reminds you what is next, so good habits stick.
Frequently Asked Questions
How is solar payback calculated?
System cost minus incentives, divided by annual bill savings — the app models it.
Does shading really matter?
Yes — even partial shade can cut output significantly; the app accounts for it.
Are rebates included?
It references common incentives; always verify current programs with official sources.
Is it for installers or homeowners?
Both — quick estimates for homeowners, detailed modelling for installers.
Does it work offline?
Yes — estimates work without a signal.
Is the app free?
Yes — estimating is free, with an optional ad-free Pro upgrade.