New 6v house batteries & main battery losing charge

What makes you think they aren't holding a charge?

12v side of life

Aren't you supposed to be able to charge them up to 14+ and when it shows around 12.5 you're supposed to charge them.

It's my understanding that when batteries are at rest with no load and not being charged 12.8v is a normal voltage level. However if when batteries are at rest with no load and the voltage drops below 12v then you have a problem..

Good luck & safe travels...:)

discount ground cable and re-charge with a regular charger. After the battery shows fully charge remove charger. Wait 4/6 hours and check voltage again. Post back.

Hi Debbie & Bill,

Can you describe what's happening a little bit more? Because from what you're saying, things sound OK. A fully-charged battery bank would show 12.8 (assuming there weren't any loads on it).