What do you guys think of this converter?

[slayer666]

This looks like a PowerMax converter but it's rebranded and being sold on Amazon. I was thinking about installing it in my camper for my 12 volt 100 amp hour PUPVWMHB lifepo4 battery.

PM3-55 RV Power Converter | Replacement for Pm3-55 WFCO WF9855 | 55 Amp | 110V AC to 12V | Compatible with Lithium Batteries | Adjustable Output 13V-16.5V |Built-in 3-Stage Smart Battery Charger https://a.co/d/6J5Amf6

 

[HRTKD]

Normally, you don't want to exceed a .5C charge rate. That converter would be .55C. Check your battery's datasheet for the actual charge current recommendation.

If you had two of those batteries, that converter would be fine. I used a similar converter that charged at the same amps for my two 280 Ah LiFePO4 batteries.

 

[fatjay]

If something goes wrong, who will you call? Be aware that you will likely have zero support.

It says lithium compatible. But it doesn't show a charging profile. Or a way to switch charging chemistries for different profiles.

I stay away from anyone who doesn't have a good track record.

 

[slayer666]

Normally, you don't want to exceed a .5C charge rate. That converter would be .55C. Check your battery's datasheet for the actual charge current recommendation.

If you had two of those batteries, that converter would be fine. I used a similar converter that charged at the same amps for my two 280 Ah LiFePO4 batteries.

Just checked and yes. It says .5 charge rate. That's only 5 amps more though. Wouldn't it be ok? Wouldn't the bms protect the battery?

 

[Etech]

This looks like a PowerMax converter but it's rebranded and being sold on Amazon. I was thinking about installing it in my camper for my 12 volt 100 amp hour PUPVWMHB lifepo4 battery.

PM3-55 RV Power Converter | Replacement for Pm3-55 WFCO WF9855 | 55 Amp | 110V AC to 12V | Compatible with Lithium Batteries | Adjustable Output 13V-16.5V |Built-in 3-Stage Smart Battery Charger https://a.co/d/6J5Amf6

I bought two 100 amp 12 volt converters from a company named Latchit They work as good as my two 100 amp powermaxs and their price $120 each. I've been charging 4 460 amp hour batteries for 4 months with no problems. The charge current stays at 92 amps for 4 hours and then taper off to zero when the set voltage is acheived. These have a 3 stage option for lead acid and are adjustable from 13 - 16 volts for LiFP04 charging. They have a customer service number and a supposed LOL, lifetime warranty. This company seems to be an R/V assessory dealer.

 

[HRTKD]

Just checked and yes. It says .5 charge rate. That's only 5 amps more though. Wouldn't it be ok? Wouldn't the bms protect the battery?

The .5C rating is probably the recommended charge rate for a long service life. The BMS will likely allow much more. When the charge current does exceed what the BMS is set for, it cuts off the charge completely. It does not throttle it down.

RV converters aren't known for being very robust. So it may never hit that 55 amp output. I would want to keep an eye on it the first couple of charge cycles.

 

[Vigo]

How much current actually flows is also VERY susceptible to the wiring between the converter and batteries.