11 years ago I had a small system installed.
It has gotten so cheap I'm going to add a second system. I plan to install it myself, and I'm working through my planning now. Micro inverter versus optimizer versus string inverter, sizing, layout, etc
For planning purposes I've been using pricing from wholesale solar, a well reviewed company in CA. Think they are near Shasta.
But I would be dumb not to shop around a little.
Any suggestions from other DIYers for whom they bought their system from?