I just bought a size 31 AGM its the largest I could fit into the battery box without doing some modifications. I have had it for a year but this is the first couple of trips that I have been on with it dry camping
. I have monitored it with a volt meter the last couple of dry camps. After three days of liberally using all my accessories including my max fan I saw a drop from 12.8 v to 12.4 with a 5 watt solar panel
. I understand that a critical discharge will go down to 11.9 v. After two days with no solar panel
and using my maxx fan at night during the extreme temperatures we recently had in BC it was still reading 12.7.
I understand that these battery's will charge 4-5 times faster than a regular deep cycle. Which means I should have a full charge after driving for 4-5 hours which is realistic for me if I chose not to plug in I will have a fully charged battery when I get to my next stop.
They will also accept a charge faster while using a solar
panel. I just bought a 25 watt upgrade but will see how that works through the next couple of years. I see that homes with solar
systems use AGM battery's, the new Telsa solar
electric vehicles as well.
They require no maintenance, they will withstand a lot of shaking so when I hit some those gravel roads it will not destroy my battery from all the shaking around.
Some marine applications have reported that they have had up to ten years service from one.
I also see that a lot of high end cars, and motor homes have started to use them.
At this point time will tell. I really don't want to be stuck with a dead battery as all the new fridges require a charge to keep the led panel on your fridge
working. It goes out and so does your fridge
That said they are not cheap, I paid close to $400 for mine through Canadian tire.