2-3 days of camping with heater running will be tough for a single battery.
I gave up on using two 6 volts, as the power (amp hours) in 12 volts batteries is nearly the same...not worth the hassle. Plus if one of the two 6 volts ever go bad...you have NO backup.
Just get two 12 volt deep cycle batteries from Costco and you will be very happy.
Now...when you change your mind and you want to go all in on solar...spend more money then you wanted, you can use the diagram below. We've gone 21+ days and had 100% charge everyday.
I gave up on using two 6 volts, as the power (amp hours) in 12 volts batteries is nearly the same...not worth the hassle. Plus if one of the two 6 volts ever go bad...you have NO backup.
Just get two 12 volt deep cycle batteries from Costco and you will be very happy.
Now...when you change your mind and you want to go all in on solar...spend more money then you wanted, you can use the diagram below. We've gone 21+ days and had 100% charge everyday.
