Are these batteries good?

[77cruiser]

https://www.amazon.com/gp/product/B094NN5KWY/ref=pe_3650410_634413250_em_1p_0_lm?th=1

Thinking about more capacity for my RV.

 

[bikeron]

 

[kmakar]

Most of the LiFePO4 batteries are identical, just differing marketing.

 

[bikeron]

Most of the LiFePO4 batteries are identical, just differing marketing.

There are some (more money) that come with the cold temp compensation. I would think that in most RV applications where the batteries are stored within the inside of the RV that would not be a problem though.

 

[kmakar]

There are some (more money) that come with the cold temp compensation. I would think that in most RV applications where the batteries are stored within the inside of the RV that would not be a problem though.

Not all coaches or campers mount their batteries inside, most keep them outside (not in a climate controlled environment), and for people like Jim who lives in the great white north, those batteries must be pulled at the end of the season because they don't have cold temperature compensation or onboard heaters. In my case I'll never go where it's cold enough to freeze, so it doesn't really matter, but I'll still be mounting them in the locked basement of my coach instead of where the normal lead acid batteries go because people have been stealing them.

 

[cage2592]

This is the guy I follow for stuff like this. Basically what Kevin is saying as well.

He seems to think they are good for an entry level

 

[77cruiser]

Not all coaches or campers mount their batteries inside, most keep them outside (not in a climate controlled environment), and for people like Jim who lives in the great white north, those batteries must be pulled at the end of the season because they don't have cold temperature compensation or onboard heaters. In my case I'll never go where it's cold enough to freeze, so it doesn't really matter, but I'll still be mounting them in the locked basement of my coach instead of where the normal lead acid batteries go because people have been stealing them.

I pull mine when it goes to storage so that's no issue.
Do I need a different charger/converter if I put a couple of these in?

 

[kmakar]

I pull mine when it goes to storage so that's no issue.
Do I need a different charger/converter if I put a couple of these in?

Typically you do because LiFePO4 batteries don't require a absorb or float cycle.

 

[Chevelle_Nut]

I pull mine when it goes to storage so that's no issue.
Do I need a different charger/converter if I put a couple of these in?

The onboard converter does not charge at a steady state that Lithiums need.

 

[kmakar]

The onboard converter does not charge at a steady state that Lithiums need.

Not so much a steady state as lead acid batteries require a bulk, absorb, and float stages, while LiFePO4 accept full charge rates and will accept all of it until it's full.

I pull mine when it goes to storage so that's no issue.
Do I need a different charger/converter if I put a couple of these in?

You can buy a new inverter / charger if you want to switch over, but you'll have to decide if its right for you. The LiFePO4's will last the rest of your life and the lead acid , well you know, you'll have to swap them ever 3 to 5 years. If you don't plan on boondocking, I wouldn't worry about it, but if you do, LiFEPO4's are a major benefit as they can be discharged down to 20% (80% DOD) without harming the batteries, then it's full power throughout the discharge range unlike lead acid.

I ordered the solar panels (10 but I can only fit 9 on the roof) for my coach and I'll be putting in four (4) 12v 300Ah LiFePO4 batteries for 1,200 Ah total and will boondock as much as possible seeing as much of the country as we can. We won't get it all done in one trip which is why I could justify the cost upgrade since we'll pretty much be living in it for awhile until we buy a new property and build a new place.

 

[Chevelle_Nut]

I cannot justify the cost to upgrade mine. I changed from 2 12v batteries to 2 6V batteries for increased battery capacity.

 

[77cruiser]

I'll revive this. When I charge using the converter in the camper I'm only getting 13.2 V, but I have another charger for lith or lead acid, it will bring them to 13.6.
My converter, it's suppose to automatically detect lith batteries.

WF-9865-AD Deck Mount Converter Charger – WFCO Technologies

WF-9865-AD Deck Mount Converter Charger: 65 AMP OUTPUT CURRENT The WF-9865-AD Converter includes the exclusive, Patent Pending Auto-Detect technology. This microprocessor-driven technology will recognize lithium-ion and lead-acid battery chemistries and adjust the charging profile to match the...

www.wfcotech.com

 

[kmakar]

When LiFePO4's charge (specifically 12v), they should end with a charge voltage of 14.7v and when charging is completed (charger stops charging), the voltage will usually drop to anywhere between 13.2 to 13.6 depending on the battery / BMS. All my 12v LiFePO4 batteries charge up to 14.7 (dedicated 40 amp lifepo4 charger) but then relax down to 13.25 after about 3 days and will self discharge about 1% per month.

I did however notice the charger you specified in the link was meant for Lithium Ion. While it should have no bearing because the batteries you bought have BMS, keep in mind the voltage differences between a lead acid and a lithium battery and the charge voltages are different.

 

[77cruiser]

So with the converter in the camper they aren't getting a max charge. When I first charged them they went to 13.6 & after 1/2 day ended up at 13.44 on was 13,45. Might have to change the converter.

 

[kmakar]

I'd leave the converter. I think it'll be fine. LiFePO4s don't have a memory and won't do them any harm. For the cost to replace the converter to gain a little in the charge isn't worth it.