Battery Size (replacing)
I need to replace my RV battery. It is a 24DC model. I know that does not mean 24 volts DC. I see a 24DC battery I can get but there is also a 27DC that has more MCA (not sure what that means but I a...
Forum Discussion
Veebyes wrote:
Cram as many amps of battery bank in the space provided as possible.
That means doing some measurement of battery case size & seeing what will fit.
Typical case sizes are group 24, group 27, group 31, 4D and 8D. Each is larger than the next. An 8D is what you would see for starting large machines, or the marine version deep cycle onboard boast as 'house' batteries.
As pointed out a single group 24 is basically a waste of time. Good enough for a very small 'teardrop' sized trailer maybe.
Since the OP isn't boondocking, just get the cheapest battery. If it's $4 to upgrade to group 27,OK but don't spend a lot of money on something you won't utilize.
The truck umbilical cord will handle the fridge and other power draws while running down the road. The battery really only needs to run the trailer brakes in the event of an emergency where the trailer becomes disconnected from the truck or to run the jack to disconnect before plugging into shore power once at a campsite.
PS: 8D batteries are almost never used as house batteries in boats or RVs. They are simply too big and awkward for normal humans to move. If you want a big house bank and don't want to go with lithium, the standard is 6v golf cart batteries. But again, this is all massive overkill for the OP who isn't boondocking.
