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Old 02-24-2015, 11:50 AM   #11
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No battery will last as long as a 8D.

Two small vs one big battery is never a good idea. It will work, but hard on battery's.

Anything you replace it with will be needing replacement at last 4 times to the 8D's life span.

Nat
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Old 02-24-2015, 12:21 PM   #12
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If not used regularly, aka STARTED AND RAN which nat says he doesn't like to do, an 8D can have a greatly reduced service life. That's why lots of folks prefer the dual 31's.
Here is a good discussion by operators of fleets of school buses-8D or Group 31 Batteries - School Bus Fleet Magazine Forums
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Old 02-24-2015, 01:38 PM   #13
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Like Nat, I have a preference for the 8D's where they are appropriate. But any battery system will suffer from sitting too long. Which ever way you go, if you don't like starting and running it every few days...invest in a good battery maintainer. And look for one that has the capacity to automatically go into float mode as well as regularly desulphate the plates. Anything less is pretty much a waste of money to my simple mind.

PS...I tried a little Northern Tool solar charger on my seldom driven Cherokee. It did ZIP. Nada. Nothing. Live & learn.
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Old 02-24-2015, 01:47 PM   #14
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I have solar charger from harbor freight on my car trailer for the wench battery and it seems to do OK.
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Old 02-24-2015, 03:06 PM   #15
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The 8Ds I looked at had around 1450 cold cranking amps while two 31s gave me 1850 CCA so I stayed with a pair of the 31s.

My rig sits all winter but I throw a charger on it once a month or whenever voltage gets below 12.2v.
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Old 02-24-2015, 03:23 PM   #16
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I think the one I used was a group 27 starter battery from Wal-Mart. We used it in the food cart to run the water pump and lights. Used it to crank the bus up every so often, then the bus charged up the battery. Bought it in 2009. Used it in the bus to power the water pump since 2011. Replaced it with a new deep cycle marine battery back in Nov or Dec since all I use it for is the pump (haven't hooked the lights up yet). No one here thinks our bus will start on the single battery. But we used the same size battery to crank an Eagle 05 with a much larger engine than the skoolie (8v71N65). That is how we knew the original bus batteries were overkill.

BTW, I don't really give a flying fig what others think about my battery setup. It works for me and that is all that counts.
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Old 02-24-2015, 03:27 PM   #17
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Quote:
Originally Posted by lornaschinske View Post
I think the one I used was a group 27 starter battery from Wal-Mart. We used it in the food cart to run the water pump and lights. Used it to crank the bus up every so often, then the bus charged up the battery. Bought it in 2009. Used it in the bus to power the water pump since 2011. Replaced it with a new deep cycle marine battery back in Nov or Dec since all I use it for is the pump (haven't hooked the lights up yet). No one here thinks our bus will start on the single battery. But we used the same size battery to crank an Eagle 05 with a much larger engine than the skoolie (8v71N65). That is how we knew the original bus batteries were overkill.

BTW, I don't really give a flying fig what others think about my battery setup. It works for me and that is all that counts.
Actually I've ran only one on mine before.
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Old 02-24-2015, 07:29 PM   #18
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Everyone of us should be using a battery disconnect when the bus is sitting, and not in use.

I live in one of the harshest environments on battery's. The 8D is the only one that will make it through the winter without being charged.

I also now use a few small solar panels to help maintain the few battery's I don't remove, and store indoors.

Nat
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Old 02-24-2015, 07:32 PM   #19
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Quote:
Originally Posted by lornaschinske View Post
I think the one I used was a group 27 starter battery from Wal-Mart. We used it in the food cart to run the water pump and lights. Used it to crank the bus up every so often, then the bus charged up the battery. Bought it in 2009. Used it in the bus to power the water pump since 2011. Replaced it with a new deep cycle marine battery back in Nov or Dec since all I use it for is the pump (haven't hooked the lights up yet). No one here thinks our bus will start on the single battery. But we used the same size battery to crank an Eagle 05 with a much larger engine than the skoolie (8v71N65). That is how we knew the original bus batteries were overkill.

BTW, I don't really give a flying fig what others think about my battery setup. It works for me and that is all that counts.
Quote:
Originally Posted by EastCoastCB View Post
Actually I've ran only one on mine before.
First gen Dodge trucks with a Cummins only ran a single battery.

Bus having the same engine is no different.

It's only when it's cold as hell out I have ever needed the 1400 CCA. Summer as little as 700 CCA seem to start the Cummins reliably.

Nat
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Old 02-24-2015, 07:58 PM   #20
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My bus started first turn of the key with one battery in 10 degrees. I'd hate to see the winters where you are, nat.
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