question

Hi @Cz0911, welcome to the Community!

I've never heard of this company before now, but I'll note an important thing: Many companies claim that they are compatible with Victron equipment (and they're not always lying), but until Victron certifies that as well, then it's not Victron-supported and so you'll be on your own with it in terms of setup, programming, and any aberrant behavior that your system may exhibit in future.

While connection of Victron equipment in non-supported systems is certainly possible and often successful, the loss of your support options in case of unexpected behavior down the road is a very important consideration to take into account prior to making any purchases. And while connection in a non-supported system will not necessarily void your Victron warranties, it also might, depending on a vast array of factors, since connection to a non-supported battery is, by definition, a type of installation error... and any damage caused by installation error is not warrantable.

Basically: I advise that you tread carefully, research thoroughly, and take the loss of support and surety of behavior into account before making any purchases!

They seem to have a CAN bus output from the picture, there are so many companies there in china, if you buy and it does not work correctly then its your risk, you get what you pay for usually, many a time I have learnt the hard way, you buy cheap then expect to have issues and you then have to be able to fix the issues.. The only way to know is to test it yourself and then you own it and have to deal with any issues, I agree with everything Justin has said.

dont do it buy one that is certified

if you do buy one MAKE sure it has a relay output for low signal and high signal. then if the can does not work you can connect to the 2 signal BMS assistant in the Multiplus II make sure you have access to there BMS settings and you can fine tune if need be.

This picture is taken in my workshop and the battery is running fine since october 2020 in a ESS system. APsystems ac coupled with a multiplus 3000 gx. The battery BMS is programmed for Victron. We assembly in Spain these batteries and load bms with the correct software to run with CAN protocol. They are not (yet) on the list of compatible battery for Victron. They do not show any incompatibily with GX systems. Regards Peter Wolff- Clean Energy Solutions - Spain

Hello,

I'm testing it for 2 months now and it's working great. I connected the bms can from Seplos to the victron Cerbo bms Canbus.

@mvader (Victron Energy) or @ an other Victron engineer/master :)

Hi! I have a ESS with 3x Multiplus, Cerbo, 2x MPPT (VEDirect) and a Battery with the Seplos BMS.

Everything works fine but before i write a short review here i have a questions, a issue and a problem:

1)
Seplos says they are sending the voltage of every single cell to the inverter but in the Controlpanel i can´t see them!?
I guess this feature need´s programming on your side?
Can you show them into the Panel?

2)
The DVCC-Function "Max. charge-voltage" works perfectly but the function "Max. charge-current" does only act when charging from the Multiplus.
When charging from the MPPT´s this function does nothing.
According to the desccription in the Cerbo-GX manual this function should control the max. charge-current from all inverter/chargers AND all MPPT´s.
Whats wrong here?

3)
The Seplos sends a max. charge current limit (CCL) of 10A when a cell exceeds 3,5V.
In the attached picture you can see that the Systems recognize this but doesn´t react:
CCL is set on 10A but the ESS is charging with full power from the MPPT´s until the BMS cuts of.

Also: Whats wrong here? Is it a software problem or do i only have to adjust a setting?
(I guess Problem 2) and 3) have the same "root"...)

Thank you very much for your help!
Best regards
Leo

I detect Seplos with a name (!)

can you change the name?

To allMake sure that you have the latest firmware installed on your Seplos BMS (Version 2.8)With the 2.8 the whole system is now running OK (CerboGC, 3ph MultiPlus, 3x4.8kW LiFepo4 15S)

Hi @Puitl

haven't make tests but new firmware seems to take High pressure alarm - 1,00V as limit for CVL

CCL is now also calculated diferently : 1C instead of 0,5C

Nice review, the latest BMS with Bluetooth:

Hi All, I`m having a bit of problems connecting my Seplos bms to the GX device.

On the BMS: canbus Victron selected.

Connected the bms to the cerbo with a normal utp cable. (bms Canbus to Gx Ve-Can)

On the Cerbo:
Profile: Can-bus BMS (500kbits/s)
Network status :
State: Error-active TEC :0 Rec:0
RX : packets:32285, errors:12070

Does not show up in the devicelist on my Cerbo GX?

If i put the utp cable in the VeBus port, the multiplus trips and shuts down ?

Anybody have some tips for me plz ?

As shown in many post about this subject, like this below for example, cable can't be a "normal" utp cable.

https://community.victronenergy.com/questions/144790/can-you-connect-a-seplos-bms-48v-100a-16s-directly.html

And don't forget also the adressing where the 4 first dip switches must be set to "Off" for the master battery

Bonjour , si c'est un bms seplos E10 DERNIERE BMS ne pas modifier les dip !!!

Hello,

I made a lot of PV installations with great Victron components using Pylontech batteries (US3000C or US5000) without any major problems.

Now I am trying this with Seplos batteries (2 pcs of PUSUNG-S - 100 Ah/5,12 kWh), but I have big problems starting from the beginning... Batteries has apparently the last firmware version 3.0 and I changed communication protocol to Victron. One module was purchased last year, the second in previous month.

First problem is compatibility with Victron communication protocol. Batteries sending to Cerbo GX all warnings/errors, charging voltage and allowed charging/discharging current. But no information about max. and min. cell voltages, temperatures, number of modules in parallel...

Second problem is that max. value of allowed charging/discharging current does not correspond to number of connected modules - the value is still the same, if there is connected only one or two modules...

Third, but the biggest problem, is with charging voltage and behaviour of the BMS. The charging voltage sending from Seplos BMS is 58.4 V, the same value as high voltage alarm. This is the bad joke... So I must limit the charging voltage using settings in DVCC. I am testing charging limit gradually between 55.2 (3.45 V/cell) and 56 V (3.50 V/cell), but the batteries make the system very unstable. When batteries reached 100 % SOC they produce very high voltage peaks on the DC bus (in my opinion due to disconnection from the bus) and sometimes even causes errors of connected MPPTs (error #38 or #80).

Example:

Does anyone have experiences with Seplos batteries with the latest firmware 3.0?

@P Fischer , @peterwolff , @Puitl , @jeanmarie , @cali-clim If you don't have problems with your installations, could you share your settings regarding the Seplos batteries - settings in Multis (Charge settings, Inverter settings, ESS settings - sustain and dynamic cut-off voltages), in MPPTs (absorption and float voltage) and Cerbo GX (DVCC)?

Many thanks for any help!

Hi @motylu , sorry but I'm using the old BMS models (10C) and firmware are only going up to 2.9 but it is working well with several batteries in //.

Your voltage jumps are totally abnormal, I concede, but can't be caused by any battery (if voltage were that high, cells in the racks would be above 4V and therefor irremediably destroyed.

You should have one charger item in your configuration that is not operating in link with imposed voltage by the BMS through the CerboGX.

My voltage and adjustments are basics some 42V for cutt-off, 51V for sustain, 55.5/56.5 for float and absorption. and DVCC activated were I control the CVL voltage as for the firmware 2.9 CVL voltage is set at the maximum (58.2V). I also have problems, but only with AC-IN and, unfortunately for me, my problem doesn't seems to generate much interest, but that's the other side of the coin Victron, without being an expert in their product or being lucky to have an installer who knows products, pass by your installation every day and push Victron's hotline until all problems are solved then you can only try by yourself reading hundreds of page of document and trying, trying again ;).

I would say, as 1st diag, try fixing the communication issue, if you have 2 racks, the the master should send correct value to the Cerbo via BMS CAN, if it does not then it means the master BMS does'nt see the 2nd rack. In older BMS you must adjut the dip swith with the following logic : DIP1-4 = 0 for master, then 1 for the 2nr rack, 2 for the 3rd ...etc. and DIP5-8 used to define higher address of the connected rack, in your case must be set to 1 (dip5=ON)

Then check which item of your installation is sending such higher voltage, either a wrong parameter or a lack of CAN linking (or both)