Multiplus ac-out 1 omvormer meting?

DIY
, ,
1

Hello everybody
I still have some questions after reading through all the documents en reading the community site

If i put the pv (all brands) on the ac out-1 and i put it on ess
Will the multiplus with the grid meter reduce the output of the pv when you want to have a zero grid setup and will it compensate the other fases

or does it only charge the battery and then shutdown the pv

And does the frequency shifting to reduce pv power also effect the devices that are connected to the backup installation?

And if i want realtime grid measurements wich 3 fase meter is the best the em540 or et340?

Thanks for the reaction
Helps me and everyone who searches for these answers here

Greetings marvin

2

Generally most devices are not affected by a frequency shift of 2 -3 Hz on 50 or 60Hz. Only devices that rely on mains frequency for operation, like old clocks and record players (Turntables) are susceptible to frequency shift.

1 Like
3

Em 540 is way faster then the et340, so i would go for em 540

It would also be helpfull if you have a meter on the pv inverter (et112)

1 Like
4

Only if your PV inverter is compatible with the Victron GX and configured correctly.
Current supported brands are Fronius and SMA, if I remember correctly.

In case you missed it, read the AC Coupling guide and check if you’re not oversizing your PV and undersizing your battery.

As long as you are grid connected, there will be no frequency shifting.
Simply because in normal operation AC In (Grid) and AC Out (PV) are electrically coupled together.
Since you can’t frequency shift the grid you can’t frequency shift your PV either, even if it is connected to AC Out.

1 Like
5

Dear marc
Thanks for the info
I want to use a Multiplus gx device with only 1 usb port were i put the em540 on,
can i use ac current sensor 40a on the temp connector instead of the et112?
Does the multiplus need pv meter for backup function to work properly?
Thanks

6

You can use multiple meters with an powered usb hub,

you can use pv without a meter

but with works better for calculations, a current clamp should also work but i have no experience with that, ET112 will work for sure

Also as bart already answered, frequency shift only works with an inverter that supports it and only off grid

7

Frequency shift will work with any inverter but indeed only when off-grid.
Active PV power throttling (via Modbus) will only work with supported PV inverters :slight_smile:

8

Exactly, only non compliant inverters wont work with frequency shift, but for most countries there not legal