How to charge 3 batteries from the power converter?

Just a thought here (yea, I know, that could be dangerous..LOL), but what about buying something like an external BMS like I used when I built my LFP battery and using it on a FLA battery? Obviously you aren't going to get individual cell voltage readings, but going into the app, couldn't you set the LVC to say 10V.....or 11V or whatever you wanted it set at?
Caution: The above statement was NOT a well thought out answer, just a quick thought that came to me....in other words, there may be good reasons that something like that may not work and is a "Duh" moment.
Hmm. I've never tried to set a BMS to 10V because we're using LFP cells. But my guess is that you could set the UPV to 10.5V (or whatever is desired), set the Power Off to 10V. Since you would only connect one lead for the battery, that would be the only cell the BMS manages. Provided the BMS allows you to make all the other setting based on higher values of a 12V battery rather than the typical LFP cell, why wouldn't it work? Interesting.

Or, as Happy Frood states, probably easier to install a low voltage cutoff. But what fun would that be? :)
 
A simple solution to those still using car batteries is the Amazon $30 Bluetooth battery monitor.

It has adjustable alarms to warn the person in command when action is required. Ours works well.

In addition the device has a recording feature to help teach you about batteries. You can see when big loads are applied and the results.

The Trojan site has charts showing battery cycle life based on discharges. Please note their data implies that tru deep cycle batteries, gc2, have about a 100% longer life. More abuse tolerant.

The issue the poster has sounds like two converter wires connected to one battery.
 
If someone designed a BMS for a LA battery, it would shut off when it dropped down to about 10v. That way, it would prevent a full discharge and add life to the battery.

I am not insinuating that LA are better in any way, but when people say a complete discharge, that means [to me] 0 volts. You just cannot achieve that with a properly designed LifePo4 battery. So, it's kinda like cheating.

Saying that a LA battery has 100ah but you need to go to 0v, is also cheating because you are slowly killing a battery. That rating to me is kinda cheating too.

I don't sell batteries and with LiFePo4 batteries that are available, I see no purpose for a LA battery anymore.
But......Cheating works!
:roflblack:
 

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