Thor Forums

[dkoldman]

Originally Posted by Bob Denman

So who acxtually makes a "true" deep-cycle AGM battery?
And can I get it in a 31?

Short answer is most everyone makes them, and yes they are in Group 31.

I need an expert to chime in, but for me the word Pure or True come in when the battery is designed 100% for deep cycling and NOT for dual purposes like Cranking RV/Marine etc.

Here are some examples.

https://www.amazon.com/Rechargeable-.../dp/B07ZN12CKD

Note. In my opinion buying the Duracell's at Costco is not a bad buy, a good buy at a good cost. That is what I was going to buy. But, I wanted maximum AH capacity and I did NOT want the automotive posts, and for me the $60 more per battery was a none factor. Batteries I bought shipped free and no taxes the true cost difference was even less. Especially considering my new batteries have 3 times as many cycles.

The reason why I crow is the fact that thus far with the new batteries, 12.7vdc is the lowest voltage I have run it down to. I upped my AGS to 12.5 vdc to auto start genset versus 12.2vdc that I had previously. I run longer in the real world off the new batteries and can recharge them at a higher voltage thus giving me even more life. It kind of flies in the face of the Lithium advantage of going down to 10% before having to recharge. For me, and for right now, the lithiums are like have too much money in a bank account unless you really need it. Right now the 125 true ahs is more than more than enough for us.