Thanks for continued discussion, all.
newman fulltimer wrote:
You have a loose or burned wirenut on the inbound wire at the inverter.I have seen this to many times.
Any advice on what to look for? None of the wires or connections seem to be visibly damaged. But this sounds like a promising area of exploration.
newman fulltimer wrote:
IF YOU HAVE THE HEADROOM (they are taller) use of 4 GC-2 (About the same price) gives you 440 Amp Hours and TRUE Deep Cycle (whqt you have now is really a starting battery)
Are you saying that 12v batteries aren't true deep cycle? I'd always thought the difference was in the size of the internal plates. The batteries I have definitely aren't starter or dual-purpose. (I had a starter for a house battery in an old Class C when I bought it. Didn't work well :)
SidecarFlip wrote:
Keep in mind that HEAT kills batteries (especially flooded cell tubs) faster than cold ever will and it's hot this summer.
Definitely. We've been in a reasonable climate for the summer, only a few days in the high 80s or low 90s, so I don't think it's that. At least, not as a cause for the rapid change I've experienced.
time2roll wrote:
Need to separate the batteries and test them individually. Then reconnect verified good batteries to the inverter and monitor the charging voltage is correct based on the settings. Post the results.
When you say monitor, are you meaning from the Magnum's remote screen, or with a multimeter, or something else? Just curious so I approach it in a recommended way. (I'm handy with a multimeter, but not a pro.)
