acceptance charging rate AGM batteries
Hi all, It is generally thought that acceptance rate for a flooded deep cycle battery is about 12.5 amps per 100 amp-hours of capacity once the bank is at 85% state of charge. I know that accept...
Forum Discussion
BFL13 wrote:
We had measurements and reports before on here that you could draw far more in amps from AGMs than with Wets (especially 6v Wets) for the voltage drop that would trigger the inverter alarm at 11v.
So the idea was (I thought!) :( that if you had a small rig that could only carry say two batts, but wanted to run a 2000w inverter to run the microwave, toaster, etc, you should make those two batts AGMs.
Now we are hearing you should not pull high amp draws from AGMs?
Which is it?
It depends, again, on the construction of the AGM battery. I run a surplus Telecom Battery. It is unique in it's construction. It's designed to run a mild steady state withdrawal, when a power outage occurs at a cell phone site. It is in no way designed to handle high surge loadings. Very few plates. Thick heavy plates that take up a lot of space inside the battery, hence a lot less surface area for chemical reaction with sulfuric acid. Slow and steady as she goes is what at Telecom battery is designed for. 10 years life, because it's expensive to run crew up to remote sites to R&R all the battery packs, so the Telecom co's want batteries that will be warrantied for 8 years, and hope they get 10 years out of them.
My situation is unique to MY battery. Ask the manufacturer of your battery. Make the phone call, find out what it will or won't do for surge loading. I'm in a small 21 foot travel trailer, solo. My needs are unique to me, and me only. Everyone's needs are different, I don't have a wife's electrical needs to satisfy daily when dry camping. To me, it's still camping, I like it a little rough.
