There have been power stations with about this capacity at about this price for a year. Here's one for $520 currently, it's been cheaper. It's more capable at 1500w/1408wh. It also charges much faster. Up to 400 watts solar vs 250 for this. Wall charging for that one is hugely faster than this. It's 1500 watts vs 220 for this.

Here's the link for this other one. At $520 it's a better deal but I don't even consider it a deal yet. I'm waiting for it to hit $400. It's been under $500 before.

https://www.amazon.com/Portable-Station-LiFePO4-Battery-Generator/dp/B0B778R2XV