Does anyone know these batteries? Would appreciate some tips on the ideal charge current, float V, cutoff V, etc settings for 2 of these on an Axpert MKS ii 5kva.

LiT58120.pdf

@Chris Hobson @Coulomb would appreciate advice, Chris I have your Axpert settings 1.1 but sure that doesn't apply to all types?

5 hours ago, Ernie said:

would appreciate advice

Chris seems to be much less active lately. You should be fine using the voltage settings recommended by Chris and others for Pylontech, as they are both 15S LFP.

However, the maximum charge current for all inverters should sum to the number of batteries times 50 A. So for one inverter and one battery, 50 A current limit. For 3 inverters and two of these batteries in parallel, set the inverters' maximum charge current to 30, 30 and 40 A (i.e. set the maximum charge current, setting 02, to 40 A for one, and to 30 A for the other two), for a total of 100 A, which should split to around 50 A per battery.

Edited May 3, 20197 yr by Coulomb
trivial plural

Thanks for the reply @Coulomb

On 2019/05/02 at 8:33 PM, Ernie said:

Does anyone know these batteries? Would appreciate some tips on the ideal charge current, float V, cutoff V, etc settings for 2 of these on an Axpert MKS ii 5kva.

LiT58120.pdfUnavailable

Hi Ernie. I have just joined the group. I have 2 of these batteries. Got no information with them and can’t get any either. Hopefully not complete lemons? Been trying to interface to CCGX and victron multiplus. Appreciate if you have anything to share. I think I have reverse engineered the can bus port, seems to be wired according to VE type B cable.

if anyone has same and cracked other information, be grateful to build on it.

lit58120.pdf

7 hours ago, Keith said:

can bus port

You can always use the candump tool to see what the battery broadcasts. Then see this document from REC, that documents the protocol for that particular BMS (but the others are very similar, I'm just not allowed to tell you in what way because of NDAs).

8 hours ago, plonkster said:

You can always use the candump tool to see what the battery broadcasts. Then see this document from REC, that documents the protocol for that particular BMS (but the others are very similar, I'm just not allowed to tell you in what way because of NDAs).

Thanks, I’ll have a look.

On 2019/06/09 at 3:23 PM, Keith said:

Hi Ernie. I have just joined the group. I have 2 of these batteries. Got no information with them and can’t get any either. Hopefully not complete lemons? Been trying to interface to CCGX and victron multiplus. Appreciate if you have anything to share. I think I have reverse engineered the can bus port, seems to be wired according to VE type B cable.

if anyone has same and cracked other information, be grateful to build on it.

lit58120.pdf 221.84 kB · 3 downloads

Found another sticker on one of my batteries. Had a different model, Huawei, esm 48100A1 has very similar specs but you can download installation manual, which I found very useful. No need to connect the can bus to the CCGX. I figured out all the ess voltages from the manual and it is now working very well.

i have a fronius on ac out and zero feed in working also.

Hi Keith, yes I also realized that they are 48100A1 batteries later. Did you get them to communicate to each other and the inverter? I bought a victron BMV which is working fine and still need to connect ICC. But the 2 batteries are not communicating to each other yet.

On 2019/07/04 at 9:56 PM, Ernie said:

Hi Keith, yes I also realized that they are 48100A1 batteries later. Did you get them to communicate to each other and the inverter? I bought a victron BMV which is working fine and still need to connect ICC. But the 2 batteries are not communicating to each other yet.

No the batteries are not communicating with each other. They wired up according to the manual, but run light sill blinking. Anyway I am not too concerned about it. They now just got to get on with it, and are doing just that.

am a bit worried that the multi is not pushing the charge but rather throttles the fronius when I have excess solar. I would have thought the multi should push 40 Amps, SOC was 96%. Taken them off battery life so I can push the soc boundary to see what they capable of.

actually I would not mind adding 2 to my rack.... and putting in some MPPT charge support on 8 x 330 Wp panels. Next bonus payout😉

Hi Keith, have you managed to get ideal settings for the batteries? I have bulk charge at 53.4, float at 51. Back to discharge also 51, back to grid 49, cut off at 46. Unfortunately the inverter switches between grid and batterries almost every hour during the evening and night. If I lower the back to grid V to 48, the low V alarm on the inverter keeps going off under 49V.