LiFePO4 24v Charger

[SemperFiSeaCoral]

Hey everyone,

I have two 100ah LiFePO4 banks (8 3.2v 100ah packs connected in series to make a 25.6v pack) and I am looking for recommendations as to a good charging source for 24/25.6 LiFePO4 banks.

I am DIY capable but if there is an off the shelf option that won’t break the bank I am not opposed to that either.

These two 100ah packs will be charged from wall power and speed of charge isn’t a huge issue.

Your recommendations are greatly appreciate.

Thank you in advance.

 

[OnTheRoadAgain]

I just bought this.
https://www.mouser.com/ProductDetail/MEAN-WELL/PB-300N-24?qs=l0g2inPJSHPjNdgtE2ltew==
It came highly recommended
(Actually, I bought the 12v version)

Meanwell

 

[MisterSandals]

These two 100ah packs will be charged from wall power and speed of charge isn’t a huge issue.

Charging from solar is fairly popular these days. Have you considered that? I do not own
an LiFePO4 charger that runs on AC power and i have over 40 cells in various batteries.

Just a thought.

 

[SemperFiSeaCoral]

Charging from solar is fairly popular these days. Have you considered that? I do not own
an LiFePO4 charger that runs on AC power and i have over 40 cells in various batteries.

Just a thought.

The pack that I have built are for use on my boat so they will be drained for trolling motor use and then brought home and recharged via AC power.

I eventually want to buy a small solar array to charge them when I go camping but for now the plan is to charge them on AC.


Any thoughts on this one from AliExpress?

https://m.aliexpress.com/item/4001261598086.html?pid=undefined&spm=a2g0n.productlist.0.0.4c17b250ewuQxu&browser_id=0d7d4de6d44c4f989faef79778e3dc8d&aff_trace_key=1037cd9644284d9d902f2d987e51ba2e-1619288250221-07425-_9fYkO3&aff_platform=msite&m_page_id=1791912fc1219f71cf6f9f220306b3eef4b214d740&gclid=&_imgsrc_=ae01.alicdn.com/kf/Hb6f935d21bb348f6ae5d48d67b5f82ac2.jpg_640x640Q90.jpg

 

[smithgeo]

Hey everyone,

I have two 100ah LiFePO4 banks (8 3.2v 100ah packs connected in series to make a 25.6v pack) and I am looking for recommendations as to a good charging source for 24/25.6 LiFePO4 banks.

I am DIY capable but if there is an off the shelf option that won’t break the bank I am not opposed to that either.

These two 100ah packs will be charged from wall power and speed of charge isn’t a huge issue.

Your recommendations are greatly appreciate.

Thank you in advance.

If using on a boat / around water - should the unit you are looking for be water resistant?

I have the 12/24v Aims unit that Will uses - it's fantastic and capable of high current / fast charging.
Otherwise - you should probably look at something more weather tight? Victron and NOCO make good 24v units...

Chargers - Victron Energy

The modern and powerful battery chargers from Victron Energy match the charging voltage with every battery system. View products now.

www.victronenergy.com

NOCO - 25A Professional Battery Charger - GENIUSPRO25

The GENIUSPRO25 is a professional-grade 6V (25A), 12V (25A), and 24V (12.5A) battery charger for lead-acid and lithium batteries.

no.co

 

[MisterSandals]

Any thoughts on this one from AliExpress?

I am far from an expert but looking at the pix, the unit shows “Lithium ion/Lithium Polymer” on it. And the 29.2v suggests it is made for those chemistries (not LiFePO4).
29.2 / 8 = 3.65v. Not sure I would want to charge to upper safety limit every charge cycle.

 

[OnTheRoadAgain]

Charging from solar is fairly popular these days. Have you considered that? I do not own
an LiFePO4 charger that runs on AC power and i have over 40 cells in various batteries.

Just a thought.

What mechanism do you use to insure that the batteries charge properly and to the voltage you want?

Do you use settings in the controller or a post controller device?

I have an Epever 4210N 40amp charger which can be configured for charging LiFePO4 batteries.

But I have a LiFePO4 battery in my vehicle as well that I use for camping and would need another SCC for the vehicle unless you know a good way to properly and safely charge in a situation like that POST Controller

 

[MisterSandals]

What mechanism do you use to insure that the batteries charge properly and to the voltage you want?

I use solar charge controllers. A Victron 100/30 and a Morningstar Tristar MPPT 45. Both set to charge to 13.8v (fairly conservative 95% charge).

I have an Overkill BMS on the Morningstar charged battery. On the Victron charged battery, I am the BMS.

 

[Ampster]

Any thoughts on this one from AliExpress

According to the specs it charges to 29.2 volts which is 3.65 per cell. I prefer a more conservative charging voltage.
NOTE: @MisterSandals beat me to the calcs but we agree on the concept.

 

[MisterSandals]

But I have a LiFePO4 battery in my vehicle as well that I use for camping and would need another SCC for the vehicle unless you know a good way to properly and safely charge in a situation like that POST Controller

Sorry, I cannot figure out what you mean by “POST” controller. Are you suggesting something after the controller and before the battery(+BMS)?

 

[OnTheRoadAgain]

Sorry, I cannot figure out what you mean by “POST” controller. Are you suggesting something after the controller and before the battery(+BMS)?

Post.....as in after the controller

 

[MisterSandals]

Post.....as in after the controller

So what do you have in mind to put in between your charge controller and battery? From my experience, charge controllers expect to have their output connected to a battery(s).