Itasca Spirit Batteries losing charge

I agree with all the aforementioned. If you have an Autozone nearby, they will both test and recharge your batteries for free. Other auto parts stores may do the same. If OK, then do the check when the batteries are disconnected for a few days. If then the batteries look OK but then discharge while connected you probably have a small current draw where you shouldn't. It will then be a long process of troubleshooting to find the leak.

I had a bad cell in one of my house batteries while in Yosemite last march. The generator couldn't keep the batteries charged. Since we were snowed in it was a bit of a problem.