Good point. You can only really recharge the batts during daytime either with solar or with gen where gen at night is a no-no.
If you only need heat at night, then you have all day to recharge that usage. Air conditioning is a variable whether you need it all day and all night or which. If it cools off at night so you only use a/c during the day, then you can't use the cooler night to recharge the batts. If it is hot at night but you are away from the rig during the day, then you get a chance to recharge with solar while you are away during the day.
