It obviously depends by region and local regulations.
It is possible to be compliant in some regions with a custom code that purely controls how grid is rejected.
I have no idea what your local regs are, merely stating that there are easier ways to adjust the voltage thresholds.
I ‘m not talking about whether it is a fault on your side or the grid side, but wiring it all up a bit differently.
We also have high grid voltages, but it won’t hurt us. Our whole home is on the AC OUT side of the inverters. In other words when the grid hits 253 Volts, the AC IN of the Victron 6K5 inverters will be disconnected. As it should. But the solar on the AC OUT side of the inverters will keep on working. Until either the load or the batteries charging requires it to step down.
The system is wired up like that. And the AC in hasn’t tripped yet. Guess the SE system is more sensitive. I believe the MP opens AC in only after 10 minutes of voltages reaches 253V.
That’s also how our Enphase solar controller works. By the way. Lowering the grid voltage in settings is allowed. Setting it to a higher voltage not. Officially that is. So if something goes horribly wrong. You’re in a bad spot. Insurance wise.
Stuur het overschot naar de consument: auto’s, accu’s, warmwatervoorziening voor huishoudelijk gebruik…
Als je nou je huis kritisch maakt, dan heb je dit niet meer. Heb ik ook gedaan en alles blijft werken.
If you want to use On and Invert Only, then control the Mode. 2 = Invert, 3 = On. Might be better than IgnoreAC.
Hi Darryl,
So your Solar Edge is tied-in on the MP2-out side?
You could set your SE on voltage curve power factor control. If set on P.F. Capacitive, your bus voltage should lower a few percentage. Look here:https://knowledge-center.solaredge.com/sites/kc/files/application_note_power_control_configuration.pdf
Also when disconnected the mains from the MP2, your SE will not be controlled by the MP2, when Batt. SoC reaches 100% than SE remains producing power and will switch off at voltage too high. (but there is a work around for that problem too Multiplus II with SolarEdge integration application note may cause damage - #6 by phaseshifter )
Daar gaat het niet om. Het gaat erom dat de voltage van het net te hoog is en de SolarEdge omvormers uitschakelen.
Je snapt het probleem niet, het huis staat op de kritische kant van de omvormers, alleen de voltage van het net is te hoog als de zon schijnt.
Why would the On/Invert Only switch be better than IgnoreAC? They do basically the same thing: opening ACin relay and being off-grid.
Hi, thanks for helping out.
Yes, the SE inverters are on the MP2 ACout1 side. I’ve looked at the SE documentation but can’t see in the manual what you mean with PF Capacitive?
Also, why would the MP2’s not control the SE inverters when battery are near 100%? That’s why they implemented frequency shifting right?
The best way is to report it to your energy supplier. I had a similar problem, but it didn’t go up to 153V. I also think there are regulations about this in the Netherlands. If the neighbors are causing the problem, a Q/U control on the inverters could be the solution.
There are several causes: if the grid frequency exceeds 52 Hz during the day, it is a grid overload accompanied by a voltage increase; if the frequency remains stable during a voltage increase, too many inverters are feeding into a cable that is too small, and Q/U would be a suitable solution, which is even mandatory in the BKW area of Switzerland.
The Q/U controller regulates the voltage via reactive power; therefore, reactive power is absorbed when the voltage is too high, while reactive power is generated when the voltage is too low. The controller thus directly intervenes in the power factor (cos phi) and changes the power factor without affecting the delivered energy. The MP2 can maintain a static power factor; -0.9 would be reasonable in my opinion. Your grid operator should provide you with the exact values. The Q/U controller regulates the power factor variably from -0.8 to +0.8.
hope it can help a bit
i agree - but grid overload - 52Hz - that would then be from Finland till Spain, as everything is one grid
If we see 52Hz one time - we will have other things to be concerned about than our PV Inverters…
I just wanted to rule out that this is a problem that can’t be solved at the user level. If the frequency is stable and only the voltage is the problem, the solution is simpler… A correctly set Q/U ensures that the power is delivered before all other inverters running at cos phi 1.
Good evening,
The high/low voltage protection Zamel Exta PMR-31 and Hager ESC464 are mounted and tested.
It’s mounted in such a way that during a blackout, the Hager main relay stays closed.
Only during a low/high voltage, phase failure, phase rotation in reverse or the Zamel relay fails, the Hager main relay will switch to open.
This Zamel output relay is energised when everything is within its limits, the Hager main relay is then not energized as can be seen by the red led.
Output 2 from the Cerbo is connected in series (by a 24V powered Finder relay) with the Hager main relay coil and the Zamel output contact, so, in case of a failure of the Zamel relay or grid we can switch the Hager main relay also manual in VRM.
We used this NC (normally closed) Hager main relay, instead the usual NO (normally open) relay.
This, not to have the coil energized 24 hours a day and generating 20W of heat and consuming 60+W of power.
Regards, Jeroen.
I have exactly the same device only different brand, also the same hager NC relay,
in my case it monitors the grid and in case of grid failure it disconnects my whole victron system/house to protect it from surge/grid power up peaks
Thats almost illegal
Because if you push 250v into your -5% transformer = 262v and you become responsible for all divices that blew up in your neighbors home
And possible his house fire if his dryer blew up because of over voltage
Grid code says 253v for more than 10 minutes = off
Over 260v = off immediately
But your mp2 isn’t inverting when its sunny its charging