At $ 279.20 it’s $ 0.39 per watt, seems pretty good!
https://www.ebay.com/itm/134406174747
use 20% off coupon code: SAVEFORSUMMER2
[Great Capacity to Size Ratio] – With 716Wh LFP cells and an 800W inverter, the EB70S weighing only 21.4lbs can power almost all your essentials on the road, from your phone to an electric cooker.
[Power All Loads for the Road] – EB70S has everything you need in one unit, including 800W AC outlets/100W PD/USB-A/DC 5521/car port. A 15W wireless charger greatly facilitates the charging of phones.