I took some drinks and fruits/veges from the house fridge and filled the JP40 about 2/3 full. Set it in ECO mode to 37F (inside the house with ambient temp 75F) while powered from an EcoFlow River 2 Pro charged to 99%. 17 hours later the EF2 was at 73%. It shows the JP40 drawing 35-45 watts while running, but the average watts during the 17 hours was about 12W. Really impressed. At that rate, the EF2 could power the JP40 for over 60 hours with a full charge.
Took it camping with the EF2 and the combination is great. Unless its really hot, you can leave the solar panel home if going just for a couple of days, Great pairing.