SilverNodashi Posted September 6, 2015 Share Posted September 6, 2015 Hi, I need to setup a 3phase inverter + PV array + battery bank on the farm, and want to use a generator for standby when it's needed. My initial choice would be 3x Axpert MKS 5Kva inverters + a 5Kw 3phase inverter from Adendorf. Does anyone know if this combination will work? I don't have either yet and need to know if this will work before I buy the units. Quote Link to comment Share on other sites More sharing options...
Wetkit Posted September 7, 2015 Share Posted September 7, 2015 Any specific reason for going 3ph? If you have loads of 3ph motors, like borehole pump, could they be run from a 1ph to 3ph inverter perhaps? If really going 3ph, the question is which is better, a single 3ph unit, or 3 x 1ph units? Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted September 7, 2015 Share Posted September 7, 2015 One can get a piece of kit that emulates 3ph whilst running off 1ph. I do not know what it is called but I do know it is possible. Quote Link to comment Share on other sites More sharing options...
SilverNodashi Posted September 7, 2015 Author Share Posted September 7, 2015 Any specific reason for going 3ph? If you have loads of 3ph motors, like borehole pump, could they be run from a 1ph to 3ph inverter perhaps? If really going 3ph, the question is which is better, a single 3ph unit, or 3 x 1ph units? There's 3phase in the house and most of the tools in the garage run 3phase 380V as well. 3x Axpers work out quite a bit cheaper than 1x 3phase inverter. Quote Link to comment Share on other sites More sharing options...
Eugene Posted September 7, 2015 Share Posted September 7, 2015 One can get a piece of kit that emulates 3ph whilst running off 1ph. I do not know what it is called but I do know it is possible. I've used a few 1ph to 3ph 230V starters with motor connected in Delta. Quote Link to comment Share on other sites More sharing options...
SilverNodashi Posted September 7, 2015 Author Share Posted September 7, 2015 I've used a few 1ph to 3ph 230V starters with motor connected in Delta. I'm not sure that will work in this case Quote Link to comment Share on other sites More sharing options...
Gnome Posted September 7, 2015 Share Posted September 7, 2015 Personally I would either go with 3 phase generator or 3 phase inverters. Going both has double the expense. Quote Link to comment Share on other sites More sharing options...
___ Posted September 7, 2015 Share Posted September 7, 2015 I'm not sure that will work in this case Indeed, when going from 1ph to 3ph, how do you create the phase shift? It can be done of course, but probably not without something like uhm... an inverter :-) Quote Link to comment Share on other sites More sharing options...
Eugene Posted September 8, 2015 Share Posted September 8, 2015 I've used a few 1ph to 3ph 230V starters with motor connected in Delta. I'm not sure that will work in this case Won't work with large motors, I used them with Cam 80 and 90 pumps. Larger ones would need a 220 to 380V transformer then a 3ph converter. Quote Link to comment Share on other sites More sharing options...
Wetkit Posted September 8, 2015 Share Posted September 8, 2015 We do it a lot up to 4kw motors. It works out a lot cheaper than 3ph invertors. That is now using a 1ph inverter for a 3ph motor. Bottom line is you have to make sure the motor connections can support 3ph @ 230V. Regarding the original question about connecting a genset to the inverter input. I have seen an option on my Infini unit for generator input, but never used it. I also know the Victron units have special settings for generator power. Quote Link to comment Share on other sites More sharing options...
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