[ncmncm]

You generally have to buy them by the pallet-load, FOB ("free on board") at the source, which means you arrange shipping. Home Depot marks up 4x for local purchase.

But used panels, at 80% rated output, are even cheaper, as low as $150. A few of those will fail, so you keep spares. They are often repairable in a few minutes if you are not afraid of a soldering iron, e.g. replace a diode or MOSFET.

Any roofer will put in mounting brackets, and almost any electrician is happy to put in the panel.

[walrus01]

Decent vendors such as sunelec.con will easily quote you a price for a one pallet load LTL freight shipment of a pallet of, say, 22 panels. Not like you have to arrange your own freight and often they get a better price because of they great monthly spend with the major us48 state LTL freight carriers.

Be sure to specify if you need liftgate service at the destination or not, because that will affect cost, otherwise by default a pallet by LTL freight will need a loading dock to receive.