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LiFeP04_RV

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Not quite \$0.85 per amp hour but the cells we have are about \$0.875 per amp hour now on eBay:

https://www.ebay.com/itm/Lot-of-8-p...377409?hash=item2ab7fc1501:g:NAcAAOSwaB5Xtx0m

We use 16 of these, they have provided us good service for approximately 3 years, they have been discharged to 20% many times with no noticeable decrease in capacity and they power everything including the air conditioning (for about 2 hr continuously) on our Roadtrek.

Yes it was painful to series-parallel them and you will not get 400 amp hours out of 16, but they actually fit the space that we had extremely well.

The seller provided extra tie straps upon request which made it a lot easier to do the series paralleling.

BTW, if you plan on camping in colder temperatures definitely either heat the batteries or place them in your heated area. I learned this the hard way in 2 builds and had to add extra heat for both.

LiFeP04_RV

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Not quite \$0.85 per amp hour but the cells we have are about \$0.875 per amp hour now on eBay:
Completely meaningless.You do NOT PRICE BATTERIES based on AH because it tells you NOTHING. Your base battery cost on Watt Hour Capacity.

Which battery cost less?

1. LFP 100 AH cell = \$125
2. LMO 100 AH cell = \$140

By your logic the LFP cell is less expensive and is dead wrong. The LMO cell is less expensive.

Battery Watt Hour Capacity = Nominal Voltage x Amp Hours

100 AH LFP = 3.2 volts x 100 AH = 320 Watt Hours for 39-cents per WH.
100 AH LMO = 3.8 volts x 100 AH = 380 Watt Hours for 37-cents per WH.
OP used a/h so I used it. Sorry it offended you.

I personally would not use LMO (lithium manganese oxide) in an RV, especially at 12V, not compatible with typical alternator voltages. Also too prone to thermal runaway, especially if not managed.

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