Multiplus-II UPS configuration issues

[drummerdimitri]

I recently purchased a Multiplus-II 15000 unit, an Ekrano GX and a Pylontech UF5000 battery.

I know it makes little sense to only be able to use a third of the unit’s capacity, but I will eventually upgrade it to a complete solar system when I move into my new home.

For now however, I just need the system to work as a UPS for my computer and electronics devices.

I’ve assembled everything as best I could but there are minor configuration issues I’d like to resolve.

Firstly, I cannot get a SOC display near the battery icon on my Ekrano GX.

Secondly, the red Prot. light on my UF5000 battery comes on when it nears its charging cycle at around 58V. Does this hurt the battery somehow or does the internal BMS not allow it to charge up to a higher voltage?

I have DVCC enabled and have tried limiting the charging current to 19A, but for some reason, it goes up to 30A when the battery is almost empty and then starts dropping the current as the battery charges.

I’ve use the inverter to bat RJ45 cable to link the battery’s CAN port(battery side) to the Ekrano’s VE.Can1 port (inverter side) and a regular UTP patch cable to connect the Ekrano to my Inverter via the VE.Bus.

The DIP switches on the battery are all set to OFF.

I’m running the latest firmware on the Ekrano but somehow I feel I’m missing something as the battery doesn’t seem to be recognized properly by the Ekrano unit.

Also, I couldn’t find the battery configuration page. Could it be set to Lead Acid somehow? That would explain the very high charging voltages.

Lastly, there are two RJ45 plugs with blue endcaps at their rear. Where do these plug in?

Any help getting my system optimized would be greatly appreciated.

Thanks!

[kr0815]

Did you use the right RJ45 Cable between Battery and MP2?

It is a CAN-Bus Cable - specially wired

The cables you get with a Pylontech Connection Kit wont work

The blue olugs are terminating resistors fpr the CAN Bus - you need one of them - plug it in the open CAN Socket of MP2

[Fideri (Fideri K)]

@drummerdimitri did you strictly follow this doc: Victron & Pylontech UP2500, US2000, US3000, US2000C, US3000C, US5000, US5000B, UF5000, Pelio-L, UP5000, Phantom-S, Force-L1 & L2 [Victron Energy]

@kr0815 do you mean the connection between Ekrano GX and the battery (not between the battery and MPII directly)?

F.

[kr0815]

yes, sorry, i mean the connection between battery and Ekrano

I was confused as i installed today 2 MP2-3000-GX - they have everything onboard

[drummerdimitri]

I tried to but they mentioned either Type A or B cables but don’t mention anything about the compatibility with the UF5000 battery.

[drummerdimitri]

I used the one supplied with the inverter labeled battery on one end and Inverter on the other. It has a blue label on each side.

[kr0815]

I dont know about UF5000, i installed 2 US5000 - maybe a typ failt, maybe country specific

The blue labeled Pylontech cavles i eceived won´t work

you will need a type A Cable

Take a regular Network Cat5 Cable, cut it in the middle and connect the wires like this:

Pylontech hat keine Verbindung zur Remote Konsole (Patchkabel Belegung?) -...

[drummerdimitri]

So a little update on the issue.

I received the Victron type A VE.Can to CAN-bus BMS cable, however even after installing it, setting the maximum charge voltage on my Ekrano GX doesn’t work properly as my battery’s Prot. light comes on in red. Even trying to set the maximum charging current doesn’t work as it still pulls about 2kW from the mains. State of charge is still not showing.

I’m frustrated and not sure what to do at this point.

[mac]

@drummerdimitri

State of charge is still not showing.

Your battery is not communicating correctly. Did you follow the guide that was mentioned before?

Connections

Plug the communication cable with the side which is labeled Battery BMS into the Pylontech CAN port of the master battery.

Some GX devices (such as the Cerbo GX), have multiple CAN ports. If your GX device has a BMS-Can port, this should be used. If your GX device ONLY has VE.Can ports, you will need to change the VE.Can port profile to CAN-bus BMS (500 kbit/s) for the battery (and then it cannot be used for other VE.Can devices).

Plug the side labeled Victron VE.Can into the GX device.

Then, plug a VE.Can terminator in the other VE.Can socket on the GX device. Two VE.Can terminators are included with the package of the GX device as an accessory, only one is used. Keep the other one as a spare.

I see no terminator in the photo so i guess not.

[drummerdimitri]

Thanks for that!

It’s been a while since I last posted and I didn’t bother to look back thinking the cable would solve my problem but I did as you said and played around with a few settings and now the system is working perfectly and I even got the SOC displayed and the battery read as Pylontech.