question

Hi The Enphase would be connected to the AC 1 OUT on the Quattro, however you must also setup the ESS assistant as this controls the Frequancy which will have to match the Enphase unit

ie reduce PV 51Hz reduce PV to Min 53hz turn off the PV 54hz NOW be careful with the OFF frequancy as the Enphase may say higher than 54 so then I would set the ESS to 54.1

Note the Hz figures mentioned are indicative and will be different depending of inverter used

as you can use the Quattro to discharge the batteries at night and then to recharge them first during the day and then also ONLY from solar then it maybe best to by Lithium Phosphate batteries as you may end up cycling them mush more than you expect and the life time of them is exceptional.

Also its a good idea to read up on the below

https://www.victronenergy.com/live/ess:design-installation-manual

Paul 8 -Thanks for reply. Does this mean that to overcome any Enphase remotely changing the setting of the S270 micros put the frequency shift high enough to ensure the micros switch off anyway? Also, while the grid is on, I'll want to charge the batteries from the most available source - grid or solar. I don't intend to generally use the batteries too much, maybe for a couple of hours after sundown - quite happy using the grid!. The main use would be for UPS for a few hours of load shedding etc - expecting more grid failure in the near future.

Cheers

How you setup the hz shut off is up to you, but the quattro can ONLY control the Freq when there is NO grid

there is also another post reply by Boekel that uses a different set of Assistants so look at the as well

by @Boekel

You don't want to use ESS, read this for configuring wat you want to do:

https://www.victronenergy.com/live/assistants:ignore_ac_input_using_the_generator_assistant

Thanks Paul B.

I don't want the system frequency too far above norm. I accept what Enphase say:- A VCR and from further research, a current limiter on the Enphase output on Quattro AC 1 - Out to switch off PV quickly when the batteries can no longer accept excess PV.

Does the Quattro have a built in current limiter so that a VCR can configured this way?

The reason(s) for exploring this are that a) I want to know what's going on, and b) in the area I live there isn't much local Victron support or too much local knowledge etc.

Cheers

As you want to use the system as a UPS, and are using AGM batteries (wich ar perfect for UPS systems), you don't want to use ESS, as that continuously cycles the batteries a little bit, and you need a valid grid code with ESS.

I think you only need the pv inverter assistant:
https://www.victronenergy.com/live/assistants:pv-inverter-support

And if you want extra measures to shutdown the pv inverter, you can use one of the relays coupled to this input of the pv inverter you mentioned, like this:

Hi Boekel, Thanks, getting somewhere now. Ok, the PV Assistant only operates when the inverter is active and using the programmable relay. However when the grid is active, does the relay still control the pv inverters?

Cheers