ESS 2 phases 2 Multiplus 2 GX shared pylontech batteries

DIY
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1

Hello All,

Explanation of the installation : 1 Micro inverter 2kw + 1 Multiplus 2 GX + current clamp sensor on MP2 + pylontech battery in CAN bus on MP2

the multiplus is configured with ESS on 1 phase connected on the ACin (no AC out connected ) , on a 3 phases network

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When the current sensor detect that the micro inverter is sending to grid the Multiplus charge the battery

when the house need power the multiplus send the battery in the house

compensate single phase objects on phase 1

compensate 1/3 of 3 phases motors

No compensate objects on phases 2 and 3

My question is If I want to do the same thing on the phase 2, I will do the same wiring for everything (like 2x single phase installation),

but is’it possible to share the battery pack ? (connect the battery to 1 multiplus and connect the 2 multiplus together)

if it’s possible how tho connect them by the CAN bus or VE bus ?

Thank

2

You can do that with victron ve bus system configurator software, set it as dual phase 120 you can do that with a multiplus 2 non gx, so the current multiplus gx controls everything

3

Thank you Marc

few more things to understand

the second MP2 will have also a micro inverter on his phase, I presume the MP2 will take this power and send to the battery pack like the 1st one

but how should I connect communication of the 2nd MP2 to the 1st MP2 to manage the power from 2nd MP2 to Battery with VE-Bus ?

also in VE configurator I don’t find the dual phases 120 on the backup of MP2 (I manage Ve config via VRM by import/export file to the MP2), Do I need the Usb to Ve bus adapter to configure this ?

also If I Buy an MP2 GX, is’it possible to disable GX to use it as a slave of the 1st MP2 ?

and last In case I do 2 separate systems 1 for L1 and 1 for L2 , no share of batteries, 1 battery per MP2, is’it working without perturbation between them ?

Thank for help

4

Also you would need more battery power if you want to run multiple mp2

5

Thank you Mark

I understand

I have 1 US3000 (37A output) and I will add an US5000 (100A output) so with 134A I have enough power to supply the 2 MP2

The last Proposal is just in case, I lose efficiency but it’s simple and working

Ok I will try with a GX and disconnect it i case I can’t make it work I still have the solution above

the small issue is that I’am not Used to work with VE-config And I don’t want to do some mistake

So for the Settings when I’am with the VE bus config

Should I load a configuration in each MP2 (for ESS, Ah of batterie…)

Or It’will be all in the GX

Best regards

6

I forgot

It’s better for me to use the current sensor of the MP2 (because I know the parameters of this), I don’t need the 3 phase compensation mode

7

You need to set them both up with ve bus configurator, loads settings (ess etc.) with ve config in both and lastly set settings in the gx

8

Thank you

I will check all of this

BR