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 > Need a battery to start my Onan, 460 cca min, dual-purpose?

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SCADAMAN29325

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Posted: 11/12/22 07:22pm Link  |  Quote  |  Print  |  Notify Moderator

This is my 3rd attempt at trying to write a coherent post. Maybe it's best that I say I don't have a clue, so I'll start with this.

I need at least 460 cca. It is also my house battery, so decent ah is desired. And of course fairly inexpensive ($200?)

I've seen this Dakota for $600, but I my budget is not ready for that.

Maybe this Optima?

Maybe just an ordinary car battery and I'll address other needs later.

Thanks for your time!

Maybe there's a good website for this.


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It may soon be home (in 4y).
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enblethen

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Posted: 11/12/22 08:33pm Link  |  Quote  |  Print  |  Notify Moderator

Why not stay with lead acid? One group 34 or 27 or two GC-2 6 Volt.


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SCADAMAN29325

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Posted: 11/12/22 08:37pm Link  |  Quote  |  Print  |  Notify Moderator

Using chassis battery to start house generator.

Since I don't have a house battery yet, it may help with deciding on a house battery that does not need to start the generator.

Hmmm...

SCADAMAN29325

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Posted: 11/12/22 08:40pm Link  |  Quote  |  Print  |  Notify Moderator

enblethen wrote:

Why not stay with lead acid?


That's a big maybe, since I really don't need to create another project right now.

Thanks!

enblethen

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Posted: 11/12/22 09:02pm Link  |  Quote  |  Print  |  Notify Moderator

Gong with lithium and other batteries may require replacement of your converter. Just another cost you need to consider.

time2roll

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Posted: 11/12/22 09:22pm Link  |  Quote  |  Print  |  Notify Moderator

SCADAMAN29325 wrote:

Using chassis battery to start house generator.

Since I don't have a house battery yet, it may help with deciding on a house battery that does not need to start the generator.

Hmmm...
I agree with using the chassis battery to start the generator. Please check that the generator charges both the house and chassis battery while running.

Not sure what the house needs are but a standard low cost 12v deep cycle from Walmart or Costco will serve fine for a year to get this sorted out.


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SCADAMAN29325

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Posted: 11/13/22 07:39am Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Please check that the generator charges both the house and chassis battery while running.


Is this as simple as checking the voltage on the house battery terminals, with engine started?

Sorry to be so ignorant about this, but just want to make sure I understand.

Thanks.

CA Traveler

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Posted: 11/13/22 08:36am Link  |  Quote  |  Print  |  Notify Moderator

SCADAMAN29325 wrote:

time2roll wrote:

Please check that the generator charges both the house and chassis battery while running.


Is this as simple as checking the voltage on the house battery terminals, with engine started?

Sorry to be so ignorant about this, but just want to make sure I understand.

Thanks.
Yes. With both batteries slightly discharged start the engine and the voltage for each should start to increase. There may be some delay on the house battery voltage rise and/or different voltage on the two banks depending upon the type of isolator.


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Posted: 11/13/22 08:45am Link  |  Quote  |  Print  |  Notify Moderator

You might consider using a deep cycle battery for the house which is generally preferred. Or a marine deep cycle which is a compromised starting battery. Deep cycle batteries will start a gen, but they do cost more being a better battery.

There are various reasons on which bank and batteries to use. Based on what you've posted I'd suggest doing what is easiest and best for you to start as you can make changes down the road as desired. Flooded batteries seem to be the best short term and lowest cost for you.

MDKMDK

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Posted: 11/14/22 11:42am Link  |  Quote  |  Print  |  Notify Moderator

Try Sam's Club for pricing, and they have different options for house/coach batteries, including deep cycle, and dual purpose, in both FLA/GEL/AGM. Not sure if they sell lithium yet, but they probably do. Some of their brands like Duracell, are actually made by battery companies like East Penn and Trojan. I started using one of their dual purpose AGMs as a chassis battery a few years back, and it's been better than a typical starting battery, as it takes a lot of abuse and still works. Something like that would probably work as either chassis or coach for you.


Mike. Comments are anecdotal or personal opinions, and worth what you paid for them.
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