Forum Discussion
valhalla360
Feb 07, 2022Navigator
ajriding wrote:
The problem with Marine battery is that it is neither made for starting or for RVs. It is made for a boat. To start the boat motor, go somewhere, turn off motor, then use electric trolling motor for some fishing, then start the motor again and return home. It neither is a good starting battery or a good RV battery, but a compromise, and really only good for a boat.
True deep cycle batts like a GC batt is much more robust and will last longer than a compromised starting/marine battery.
Actually, most "dual purpose" batteries are simply starting batteries with wing nut terminals to attach wires/cables to the battery. The internals aren't really any different.
This shows up in them being rated by MCA (Marine Cranking Amps) rather than CCA (Cold Cranking Amps). MCA is measured at 32F because it's rare for pleasure boats to be operated below freezing and at the higher temperature, the amps a battery can generate are higher. CCA is measured at 0F with corresponding lower amp ratings.
True 12v deep cycle batteries are rare specialty items. For most practical purposes, you are far better looking into a lithium system before searching these out.
6v golf cart batteries are a good option...but only once you've done an energy audit, so you have an idea of what your usage will be.
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