[JRTJH]

You don't say what size or type of batteries you currently have. If they are "standard GP24 deep cycle" batteries, they probably are being "outclassed" by the demand for power during the evening.

Some would suggest upgrading to GP27 or even GP31 (12 Volt batteries) while others would suggest upgrading to a 6 volt (golf cart batteries) system. Whatever you do, be sure that you're getting "true" deep cycle batteries, not the "typical "dual use" battery.

For most of us, a dual 6 volt battery system is sufficient for "conservative dry camping" for 3 or 4 days without furnace use or for overnights with extensive furnace use. Augmenting that with a generator or a solar recharging system will usually provide enough power for most lifestyles. But if you or someone in the camper "needs the TV running for noise" no matter what they're doing, it's hard to power that kind of lifestyle when dry camping.