The EFOY 1600 outputs 65 watts.
130 Ah per day.
The EFOY 2200 outputs 90 watts.
180 Ah per day.
A 13,500 btu rv air conditioner uses approx 2,800 watts at startup and 1,800 watts when running (source: http://powerequipment.honda.ca
So, if you run the air conditioner for 1 hour then the Efoy 2200 would have to run for 20 hours to recharge the batteries.............
In practice, you wouldn't do that. You'd start the van engine instead.