AGM batteries?
Is it imperative to have AGM batteries with a solar set-up? Why? Could you not just use 2 6v batteries (not AGM's)? Do they last longer? How much and are they really worth the price difference?
Forum Discussion
DWeikert wrote:
The only other thing your missing is the practical depth of discharge (DOD) for an AGM battery is 50%. For Lithium-iron-phosphate, it's 80% DOD. Thus, to get the same usable energy the AGM needs roughly double the Ah rating of the lithium.
lithium-ion vs agm
That said, I just installed 2 new GRP-31 AGM's in my camper. I'm thinking by the time these need replaced the lithium price point will be much more attractive.
Depth of discharge was explicitly including in my calculation by using available AH instead of rated AH.
Agree about the price being better in the future.
