My solar panels are installed!

[skyking]

I put snow bars on my roof to keep it on there to melt, rather than slide off and damage plants and humans.

 

[dante455]

If you guess now and change panel size or spacing later, you can end up with standoffs in dumb places and extra roof penetrations for no reason. I used Wolf River Electric and they were picky about lining mounts up with the actual rail plan and roof setbacks, not just hit a rafter and hope.

If you’re set on pre wiring, the best “do it now” moves are conduit path and a clean route from attic to the main panel, plus leaving space for a breaker and any future disconnects.

For the little 1.4 kW shed array, keeping it separate with its own small inverter and a tidy disconnect setup makes life easier than trying to merge it into a future big system.