3 Phase

[Jacques]

First a little about myself. From South Africa and part time farmer. I use solar submersible water pumps for at lease 10 years and lately our electricity supplier became very expensive and totally unreliable and i want to go of the grid completely . I need 3 phase power(380 Volts) and want to go with three single phase off grid hybrid inverters instead of one 3 phase inverter . Solar by day and maybe wind by night or a back up generator. My questions are .

Can i use the current cabling by connecting a phase per inverter and share the common neutral between the 3 inverters? Will i get 220 volts between a single phase and neutral and 380 volts between the phases? any advise about wiring and the hardware needed will be welcome. Thanks

 

[Supervstech]

There are inverters designed to link up for this, but they have to be designed for it.

 

[offgriddle]

I've not heard of three phase 380 volts but I have heard of three phase 480 volts. My concern with using three, single phase inverters in conjunction to create three phase, is how do you keep the output of each inverter 120 degrees out of phase amongst the three? I don't think that sharing a neutral alone creates the correct phase relationship amongst three, seperate single phase invertors but if you got the idea from a qualified and knowledgeable source, then maybe it can. Either way, this is a manufacturer of three phase inverters for solar application, they have a decent website and an African support address, phone number and email address. Good Luck! https://www.solaredge.com/us/products/pv-inverter/three-phase#/

 

[Supervstech]

I have seen the ea sun links for 3phase with 3 units conn3cted with a sync cable
Also, mpp solar sells 380v3phase models...

 

[gnubie]

Victron has units that can be slaved together to produce 3 phase too.

 

[burtinator]

The victron multiplus does seem to be able to create a 3phase+N setup. I just found this image on google, so don't quote me on this.