BATTERY LIFESPAN survey...
Near impossible to recollect the number of discharge cycles So........ Anyone gone ONE HUNDRED EIGHTY BOONDOCKING DAYS on the same battery? Doesn't sound like much unti you figure out this m...
Forum Discussion
David,
This is NOT what you asked .... but, but, but you might be ever so slightly interested anyway:
My RV's two paralled 100 amp hour 12 volt deep cycle (by design -> wheelchair batteries) AGM batteries have this month been in our RV for 8 years and one month.
We're getting the rig tuned up for trips this year and I assumed my batteries have to be/must be/gotta be about shot. So ... I load tested them yesterday by using them to only (disconnected from the RV) run a 120V AC 150 watt personal ceramic heater through a PSW inverter for five(5) hours straight. After letting them rest for about an hour I checked their open circuit voltage and it was ~12.31 volts. During the five(5) hour load test, the inline ammeter read around 20 amps, give-or-take, being drawn from the 200 amp hour battery bank made up of these two AGM deep cycle batteries.
I guess they're (happily) far from shot ... thus saving me around $500 for a couple of replacement 12 volt Group 31 AGM batteries ... I had even narrowed my new battery search down to three products in preparation for a disappointing load test.
They've spent most of their 8 years and one month between drycamp spots on the 13.8 volt single-stage converter (floating/charging them) or Ford alternator charging them. All this probably proves that it's not necessarily years or fixed voltage converters that's hard on AGM batteries - it's putting too many cycles on them.
I believe that your OP was looking for, in effect, record-breaking number of cycles field data from users. ;)
This is NOT what you asked .... but, but, but you might be ever so slightly interested anyway:
My RV's two paralled 100 amp hour 12 volt deep cycle (by design -> wheelchair batteries) AGM batteries have this month been in our RV for 8 years and one month.
We're getting the rig tuned up for trips this year and I assumed my batteries have to be/must be/gotta be about shot. So ... I load tested them yesterday by using them to only (disconnected from the RV) run a 120V AC 150 watt personal ceramic heater through a PSW inverter for five(5) hours straight. After letting them rest for about an hour I checked their open circuit voltage and it was ~12.31 volts. During the five(5) hour load test, the inline ammeter read around 20 amps, give-or-take, being drawn from the 200 amp hour battery bank made up of these two AGM deep cycle batteries.
I guess they're (happily) far from shot ... thus saving me around $500 for a couple of replacement 12 volt Group 31 AGM batteries ... I had even narrowed my new battery search down to three products in preparation for a disappointing load test.
They've spent most of their 8 years and one month between drycamp spots on the 13.8 volt single-stage converter (floating/charging them) or Ford alternator charging them. All this probably proves that it's not necessarily years or fixed voltage converters that's hard on AGM batteries - it's putting too many cycles on them.
I believe that your OP was looking for, in effect, record-breaking number of cycles field data from users. ;)
