Single phase 6000VA solar edge inverter on 3phase grid

Q&A and troubleshooting
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1

Hi

I want to install a multiplus 2 5000Va with pylontech us 5000.
But hhe isseu i have is that the inverter the costumer has is a single phase 6000Va this exceeds the 5000Va on the multiplus.
It’s a 3 phase grid is it ok that i put the multiplus on another phase than the excisting inverter?

Kind regards

2

Hi Nick,
If your customer has < 5000W of solar connected to the inverter, or you can program a fixed limit of 5kW in the PV inverter, then you are ok on the same phase.
Otherwise installation on a different phase, or with the PV inverter on the AC in side of the Multiplus, is ok too.
Also, please make sure that your battery can deliver sufficient current for the multiplus. A single US5000 battery is limited to 50 Amps continuous, this is insufficient for a 5kVA inverter.

3

Hi mike

Thanks for the reply.
2 pylontech us 5000 wil come.
Is it possible to only connect the ac in?
The multiplus only needs to charge and discharge the battery when there is to many or to low solar power.
Client doesnt need any back up function

Kind regards

4

You cant put it on an ac out from the multiplus (1:0 rule)

So Yes its ok put it on another phase, you can always measure it with an energy meter (et112)

5

Hi marc

If i put the multiplus on another phase the ac pv inverter needs to measured ?

6

You dont have too, but depends on what you want to do, if you run it as an ess its helpful, but a 3phase grid meter would also be helpfull then

Also take a look at minimum battery recommendation, one us5000 is (too) small for a multiplus 5000

7

Yeah it would be an ess for the beginning i would be only for the surplus for maximum self consumption maybe later for dynamic ess.
2 x us5000 would be the setup.
Do you recommed the us5000 in parallel?
Or the batterys connected with single pair of cables to the multiplus?

8

Then a grid meter would be needed, and a meter for the PV if you want to measure it right (your choice)

2x us5000 is ok

Either parallel connected to each other with plus from one and minus from the other

or both wired to a busbar is ok

dont stack connectors to connect both to the multi!

Also dont forget to fuse everything!

9

Ok marc

Thanks for the great informatio and the fast reaction

10

For the 5000W inverter, you do need 4 or 5 US500c as minimum, Due to the battery discharge limits.
Yes, it is possible to only connect AC in, I have a 3000W inverter connected like this.