Community Forums

Triangle Drifter · 03-29-2019, 06:25 PM

AHs are AHs no matter how you package them. There are fast discharging starting batterys & there are deep cycle batterys designed for long slow discharge rates. Pack as many AHs as you can in the space available.

There are different battery chemistry types as well which adds another consideration. Also, fewer connections the better. I have a single case size 4D battery that produces about 215AH. Yeah, it is heavy. Weighs about 110#.

Winemaker2 · 03-29-2019, 06:38 PM

Good technical analysis.... read this and then decide what's best.
https://marinehowto.com/what-is-a-deep-cycle-battery/

crazymason · 03-29-2019, 09:49 PM

Quote:

Originally Posted by Winemaker2

Good technical analysis.... read this and then decide what's best.
https://marinehowto.com/what-is-a-deep-cycle-battery/

Good link, satisfies the battery nerd in me 🤓

Mr_D · 03-29-2019, 09:55 PM

Quote:

Originally Posted by HJLowell

2, 6 volt batteries = 12 volt
1, 12 volt batterie= 12 volt

So ????

Add the AHour of the two
6 volt batteries togeteher.

How does it compare to the
One 12 volt batterie.

Amp hours of two 12 volts add together, volts stay the same.
Amp hours of two 6 volts stay the same, volts double.

gpounder · 03-29-2019, 10:09 PM

Now that the math is all figured out there is good reason to use 6 Volt batteries in series rather than 12 volt batteries in Parallel.

Parallel battery set work fine when new but degrade in time because they are never matched. When one cell goes bad it drags down the other battery. It also upset the charging process whereby one battery can absorb more charge leaving the other battery under or over charged.

It will also be harder to notice as the good battery make the set look good.

These problem goes away when batteries are in series.

When one cell goes bad the result is immediate, low voltage. You can also mismatch batteries, just know the smaller battery is the limiting factor.

chunker · 03-30-2019, 07:19 AM

Ponder this, there are a lot of comments here by people who don't know the difference between a volt, amp, ohm or parallel and series. Advice on batteries can be dangerous in addition to useless. If you hook up batteries based on some of the comments here, you are on your own when it comes to damages.

garbonz · 03-30-2019, 02:19 PM

Quote:

Originally Posted by gpounder

Now that the math is all figured out there is good reason to use 6 Volt batteries in series rather than 12 volt batteries in Parallel.

Parallel battery set work fine when new but degrade in time because they are never matched. When one cell goes bad it drags down the other battery. It also upset the charging process whereby one battery can absorb more charge leaving the other battery under or over charged.

It will also be harder to notice as the good battery make the set look good.

These problem goes away when batteries are in series.

When one cell goes bad the result is immediate, low voltage. You can also mismatch batteries, just know the smaller battery is the limiting factor.

Sort of but gross exaggeration if they are wired properly.