Golf Cart Batteries

I be used four 8V exide golf cart batteries on my 53 with 8V71N and they crank just fine. I know others who use them with 8V92T

Not sure about the 12s

Why not? For house purposes y can use four 6 volts or three 8 volts to make a 24 v house bank. I'd prefer the 8 volt batteries as that would be one less connection.

For cranking, I m not a big fan of not having dedicated start banks. On larger boats there is no reason not to have dedicated start banks. I know you re almost always on Genset but all it takes is the charger shutting down to run down the bank shared by house and start. And even with a parallel solenoid as a back up it s less than ideal

We use the East Penn 19" 8V batts for our 32volt ship & 12V71TIs.
Two banks. Each starts it's main engine and runs half the boat.

Factory set up. Works like a champ. Twice a year water levels are checked and added to.
Once a year each cell gets tested and the batts get carbon pile load tested.
On the average, they last 4 years before any loss of performance is noted. They could go 5 or more but once they start loosing any umpah, you never know when they will fail completely and strand you.

I have added some 24Vdc taps;
The 10KW radar draws it's 24Vdc from third batt on the port bank.
Some other 24Vdc options are tapped off the stb bank.

I replaced both banks with the Trojans this past spring and couldn't be happier. They're
easier to deal with and the motors start without a problem.

Hummmm
We are all talking about flooded batteries here I thought.
Better golf cart batteries designed for rapid cycles can take a high rate of recharge. As much amps as the wire can carry up to 2.4V (or more) per cell.
The float or finished maintenance charge on near all flooded batteries end up around 2.15 to 2.20 Vdc per cell.
6, 8 or 12v batteries flooded carry the same chemical characteristic, some can discharge or re-charge at different amperage's, the end result per cell is near the same.

With this simple rules in my mind, your statement confuses me a bit. Can You explain further?

Odd. Charging profiles vary depending on the type of battery but for lead acid each cell is usually 2v The 8v batteries have an extra cell. It's no different from the rolls batteries which are made up of individual 2v cells tied together externally

Call that dude back and ask him to elaborate !
I appreciate all your inputs but you need to start taking notes !!

Aircar
Is your ship still 32v or 24v? What cranking amp spec does the T9 battery offer?

I have been using 6 Trojan T105's for years now, arranged in series/parallel for a 12V system. I do have separate starting batteries, but the Trojans will happily crank as well. The last bank lasted 7 years before one cell failed. Before that it was about 5 years (I think). Just need to top up the water every now and then.