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8D sealed battery at O Reilys auto parts


Wrknrvr

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That particular battery is a starter battery and would have the equivalent of around 140ah capacity.

 

For the size, weight, and cost.. you would be better served spending your $200 on a set of 6v's from costco/sam's. They would be true deep cycle and would give you approx. 220ah's for around $170-$180.

 

Ideally you don't want to discharge below 50% so you are looking at 70ah's vs 110 (60% increase) and you save a few bones in the process.

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It depends on what you are replacing, intended use (chassis or house), how many batteries you currently have in that bank, and how much space is available. If this battery is comparable in size and capacity to the original, and you replace all the batteries in that bank, it should work fine. Converting to 6v is not always the answer.

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Converting to 6v is not always the answer.

 

Very true. However, it's not difficult to find a true deep cycle 12v battery of an appropriate size that would provide a much larger amp hour capacity for the same or less money. The 8D2ST is a 'very' large battery with 'very' decent CCA, but you're not getting much storage capacity.. which is really what you're wanting in an RV application.. if it's intended for the coach/house battery that is.

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What would be a good "House" battery on the truck?

Truck has its starting batteries and 4 4-D batteries that came with the truck. All batteries are charged by the truck alternator thru a battery isolator (140 amp).

Also, the height of the 6v batteries will not fit into the designated compartment. Truck "House" has a 3500 watt Prosine ps inverter that powers the fridge, microwave, and I can currently plug the RV into it when needed.

Not looking for the most expensive AGM out there, but a sealed battery would be nice.

 

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What would be a good "House" battery on the truck?

 

Hey Jim.

 

What are the dimensions of your storage area and what is your target capacity?

 

If you're just looking to swap them out for 4D 12v AGM marine that would probably give you around 200ah's per and run about $300 for a "big box" brand. Name brands could set you back $600.

 

If you have standard 4D's now.. then you're probably around 140-160ah's per.. which would mean you could get just about the same available ah's with just 3-agm's instead of 4-4D's. That would save you some 140-160lbs or you could up your capacity.

 

Although, depending on your needs and available space, there might be an even better option out there.

 

A quick 'peek' on google shows Sears having theirs on sale at the moment for $289. That's pretty decent.

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This battery is rated with 325 reserve capacity and is sealed

 

Exactly. 325 minutes reserve capacity @ 25amps. So.. 135 amp hours.. or roughly 67 usable ah's in order to keep your batteries SOC (state of charge) above 50%. Be aware though that the rate of discharge on a starter battery differs greatly from that of a hybrid or deep cycle. Meaning.. those numbers don't actually reflect a constant 25amps over the full 325 minutes of reserve capacity.

 

A sealed "maintenance free" lead acid starting battery is not the same animal as, say.. an AGM.

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A sealed "maintenance free" lead acid starting battery is not the same animal as, say.. an AGM.

Well, that is a definite "understatement". :)

 

Using a starting battery in "house" service is going to directly lead to a lightening of your pocketbook. That assumes you actually put a reasonable load on it.

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