We are carrying out commissioning on the following Setup in the UK.
MultiPlus-II 48/5000/70-50 230V (v500 FW)
ET112 (grid meter)
SMA 4000 inverter 3.42Kw PV (on AC-Input 1)
ET112 (PV inverter)
The system is setup in ESS mode.
All G98 checks have been carried out and the everything works as expected.
The whole house is on AC-out-1.
The DNO has set a 6KA limit on export. So G100 test is required.
“The ELS must detect an excursion and reduce the export to the Agreed Export Capacity or less within 5 seconds.”
Settings, ESS, Grid Feed-in
AC-coupled PV Feed in Excess (ON)
DC-coupled PV Feed in Excess (OFF)
Limit System Feed-in (ON)
Maximum feed-in(6000W) Temporarily set to 300W for test.
In ESS mode the Grid set point was set to -500W. System ramped up to around 500W export and sat there. There was no change to “Feed-limiting active” that stayed at NO. We assumed that “Feed-limiting active” would change to (YES) and export would be restricted to “Maximum feed-in” 300W. This did not happen. Is this because we artificially forced export by setting Grid set point to 500W. Is there another way to Force export?
We tried this with the grid tied SMA inverter charging the battery and with the Grid tied inverter turned off.
We know that in ESS mode there should be very little export. Grid tied inverter can in theory (battery full and no House loads) export max 3.42kw and we have no control over that. There is no DC coupled PV. ENA site lists Multi 5000 as capacity of 4.4kw so DNO totals that as 7.82kw potential export.
Does Grid Feed-in work for anyone. What are we doing wrong. Any advise would be greatly appreciated.
In the document G100 Declaration Victron Energy ESS
Removed wire from ET112 (grid meter) Multi Continues exporting. But shuts down inverter and goes into pass through at 60seconds. Not 3.6 seconds as in document as above.
Unplugging rs485 USB adapter has the same result.
Disconnected VE.Bus cable (simulates power loss on Cerbo) Multi Continues exporting. But shuts down inverter and goes into pass through at 60seconds. Not 2.1 seconds as in document as above.
“The response time under loss of communications, or loss of power, response time is less than 3s”
So we are well outside the 3 seconds. Is this again because we are forcing the export by Setting Grid set point?
Have we missed as setting or a box is not ticked somewhere?
Any help would be very much appreciated.