LiFePO4 for main battery

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Sep 22, 2021 | 10:10 AM

blaczero

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Cross-Country

Joined: Nov 2020

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LiFePO4 for main battery

Anyone using this as the starter battery? I have a compressor on board and want to use it a lot with engine of, figured it be useful to use a lithium battery instead of flooded.

Sep 22, 2021 | 10:18 AM

smikesF350

Tuned

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I was thinking of using those batteries in my motorhome and have heard that these type of batteries require a completely different charging system and that the normal alternator destroy the battery.

Sep 22, 2021 | 10:34 AM

seventyseven250

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From: Calgary Canada

Quote:

Originally Posted by blaczero

Anyone using this as the starter battery? I have a compressor on board and want to use it a lot with engine of, figured it be useful to use a lithium battery instead of flooded.

I think "standard best practice" would be to run a second battery that was responsible for the accessory load, and have an isolator between them so you can't run the main starter battery down.

Sep 22, 2021 | 11:28 AM

scraprat

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From: Itinerant

Lifepo4 will not like the heat of the engine compartment of a vehicle.

Sep 22, 2021 | 12:52 PM

BillyE

Fleet Mechanic

Joined: Feb 2018

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Quote:

Originally Posted by scraprat;[url=tel:20075598

20075598[/url]]Lifepo4 will not like the heat of the engine compartment of a vehicle.

Nor do they supply the necessary CA. These are deep cycle batteries.

Sep 22, 2021 | 12:55 PM

GM in a Ford

More Turbo

Joined: Mar 2021

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Quote:

Originally Posted by scraprat

Lifepo4 will not like the heat of the engine compartment of a vehicle.

They don't like cold either. Can't charge them below around 30 degrees.

Sep 22, 2021 | 01:19 PM

scraprat

Lead Driver

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From: Itinerant

Quote:

Originally Posted by GM in a Ford

They don't like cold either. Can't charge them below around 30 degrees.

I wouldn't know much about them.

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Sep 23, 2021 | 07:47 AM

B-ManFX4

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Joined: Feb 2021

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From: East TN

AGM is a battery construction strategy, not a battery chemistry. Its fundamental chemistry is still based on lead, sulfuric acid and water. LiFePO4 is a totally different battery chemistry and not really suited to vehicle starting applications.