Battery recommendations for 1500W inverter
Does anyone have recommendations for a 12V battery setup that can power a 1500W inverter? The background: my travel trailer is currently powered by two 6V golf cart batteries (Duracell SLIGC110 215...
Forum Discussion
theoldwizard1 wrote:
This chart surprised me ! 80% state-of-charge is about 12.5V !
Why?
Your answer may be related to an observation of mine:
My twin Group 31 Fullriver AGM RV batteries DO NOT show fully charged at-rest terminal voltages in the low 13.XX's range - like my Group 31 Yellow Top AGM Optima battery does. When fully charged, my Fullriver batteries always read only around ~12.8 volts after their post-recharge surface charge has dissipated.
At first I was concerned about this, but I finally accepted that probably not all AGM batteries have the same electro-chemical characteristics.
As I've mentioned many times, I went with Fullriver AGM batteries because of their advertised float voltage range being an exact match to my RV's stock Parallax converter's output voltage range. At the time, the closest Lifeline equivalent batteries had a required float voltage range around 13.2 volts and the Lifeline rep stated that long exposure to stock converter output voltages would over time degrade Lifeline AGM batteries.
As I mentioned earlier, the Fullriver batteries were priced only slightly less than the Lifeline batteries, so I figured that anything manufactured in China but priced only a little less than the best that were manufactured in America ... must be pretty good. Subsequent research and experience has so far confirmed that about Fullriver AGM batteries.
