Why check the roof first

Panels typically outlast the roof they sit on. Re-roofing under an installed array means removing and reinstalling the system, which can cost a meaningful fraction of the…

1. Roof age and condition

2. Orientation, pitch, and shade

Production depends on where the panels face and what shades them. South-facing is best in the northern hemisphere; east and west are workable; north rarely pays.

3. Structure

Panels and racking add weight and wind load. Most modern roofs can take it; older or altered ones need checking.

4. Electrical

5. Rules and paperwork