eBay with EcoFlow has the certified refurbished, nearly new EcoFlow Delta Pro 3600Wh Portable Power Station for $1374 - 20% offwith coupon code CYBERWEEK20 [Exp 12/1] = $1099 with free shipping. Roughly 31 cents per Wh. The very good rated refurb option is $859 as well.

Comes with all accessories, has a huge capacity and fast charge. Check out this review.