The Westinghouse IGen 1000s is very like the Ecoflow Delta, although they claim slightly longer charging time, and a little less kWh capacity, less running and surge output for the Westinghouse. The differences are small enough that I wonder if the hardware actually is any different. The Westinghouse lists for $999, and is sold by Home Depot among other places. Given the price and 90 day returns (at Home Depot), I think the Westinghouse IGen 1000s is a reasonable alternative to the Ecoflow Delta. Here's a non-affiliate link.