What is the indented and suggested way to use a 3 phase Multipls system with DESS and also a generator for emergencies.
I have searched the forum and am a little surprised that this does not seem be readily supported.
The suggested way seems to be to use VE configure to switch off grid code and some other settings to use the AC 3 phase in for the generator.
Could this be programmed to be switched on the fly using an assistent? Obviously do not want to feed AC back to the generator or cause any other issues.
Is this correct or am I missing something? Many thanks for any hints.
The MP2 has 1 AC_in and is designed to either be connected to grid or to generator. For generator usage the AC_in need to be configured with “no grid code”.
The Quattro has 2 AC_in. One can be configured with grid code for grid usage and the other w/o grid code for generator.
With existing grid connected 3p MP2 setup you could connect your generator using Huawei or Eltec Flatpack 2 TelKo PSUs to create 54V DC.
You get them around 150 EUR at eBay.
If changing grid code - and interruption of power supply during the change - is acceptable, it’s the most economical solution.
The Eltek FlatPack 2 are 1p PSUs. Link attached.
They can be limited in voltage and/or current. You could use three and limit each to 1,5kW to not overload you 5kW generator. There are projects to control those via CAN-bus and Home Assistant.
There are quite a few threads on here on this kind of subject and I believe I have now read them all
We are still also looking for the best existing Victron charge solution that we can afford to charge a 48V LiFePo battery bank directly from a 5kW 3 phase generator to the batteries and not via the genset.
We have an existing 3 phase Multiplus II system and want to leave that as it is working great now and would ideally ike to be able to start the genset without editing settings. The Elltek solution in this thread is probably the best candidate but it is still a bit raw DIY as I understand it, so still doing research on alternatives.
Of the existing Victron chargers, only the Skylla 48 TG and the Smart IP 43 can do 48V, so would it for example make sense and is it technically possible to add 3x Smart IP 43 chargers, one for each phase for approx 1.8kW or even parallel 2 for each phase for a total of 6 and approx 3.6kW, which might not make sense from a price perspective but maybe still worth some research. Recommendations for other Victron gear I may have missed that can share charge voltages and such would be great, as the Skylla 48/25 TG does not, but might still be a nice match for a total of approx. 4.2 kW if you can afford 3 but that is beyond our budget and again it also does not talk to a GX device which would be nice. I am again aware of the flatpak and huawei which may still make sense if a can bus DIY solution that is tested and polished arrives.
