This is a YouTube video. This guy did a very good job of building an off-grid solar system. It’s transportable, uses four 100 watt panels, two 12V AGM batteries in parallel, can supply 120VAC pure sine wave at 2000 watts and costs under $1,900.
This is an excellent video with plenty of details. He calls it a generator but it’s not a gasoline generator, it’s a 12VDC to 120VAC inverter. He talks about how much better this system is than a gas powered generator, and it’s cheaper in the long run.
Other videos:
Will Prowse recommends the Giandel 4000 watt pure sine wave inverters. He said that some others have failed (let the smoke out) for no reason at all. He links to Amazon but I found them for cheaper on eBay.
