I recently bought a Must 51.2V 100Ah battery (LP18-4100).  It doesn't have an LCD screen, only 6 LEDs showing the SOC and my Axpert 3Kva doesn't have ports to connect to.  The battery came with a cable that fits into RS485 and 232 ports on the battery.  I have a spare windows tablet that I would like to use to see the battery data, but this only has USB ports.  I assume one can get a RS485 to USB adapter, but I suppose I would need some type of software too.  Anyone got a solution for me, I am rather dof about these things.  Thanks

8 hours ago, dax021 said:

I recently bought a Must 51.2V 100Ah battery (LP18-4100).

@dax021The above lfp battery is for 48v 5kw inverters and upwards.

The Axpert ( Voltronic) 3kva inverter is 24v do not connect the 48v battery to the 3kva inverter you will see sparks fly.

Hi thanks for the response, but not what I asked.  I guess I should have said Axpert 3Kva Plus version, it is definitely a 48V inverter and has been performing without a glitch for about 5 years on my old 2nd hand golf cart batteries.  Recently had an 8 day power outage, so bit the bullet and bought lithium.  It has been performing well on this battery for a month now, I just want to read the BMS info. Thanks. 

3 hours ago, dax021 said:

Hi thanks for the response, but not what I asked.  I guess I should have said Axpert 3Kva Plus version, it is definitely a 48V inverter and has been performing without a glitch for about 5 years on my old 2nd hand golf cart batteries.  Recently had an 8 day power outage, so bit the bullet and bought lithium.  It has been performing well on this battery for a month now, I just want to read the BMS info. Thanks. 

4 letters or even just one make make a bit difference. 🤔🤔🤔

Correct the Plus can be 24 or 48V.

Edited October 23, 20232 yr by Scorp007

If you can source the correct cable then you can use PBMS Tools to monitor your battery from a laptop or PC.
Alternatively a once off license purchase with Solar Assistant could provide you with a good platform to monitor your complete system. Whether SA supports both your products at this stage I don't know. But drop them a mail and see if they do. [email protected]  
The SA solution will be an additional expense as it requires a Raspberry Pi and the once of license.

@zsde, thanks, that's what I wanted to hear.  I will look up PBMS Tools.  The battery came with a cable marked Inverter on one side and battery on the other.  I think they are RJ45 plugs.  I'm assuming (maybe incorrectly) that I can get an adapter from RJ45 to USB for my laptop.  My inverter only has one port, which looks like a printer socket, I believe it is USB, but I have never managed to communicate with it.

@Scorp and @TaliaB, you are correct, I could have explained better, just didn't think it was necessary, apologies.

@dax021did you manage to find a solution. 

Hi Andrew, not yet.  I downloaded PBMS Tools as per  @zsde recommendations, but have not sourced a RS485 to USB adapter yet.  They are available, it seems, but the postage is more than double the cost of the product, so on hold till I can make a plan.  I assume you have the same battery?