I tried to parallel 2 phoenix inverters, both 48V 5kVA units and physically identical, bought 3 months apart.
Victron's VE BUS configure software would not allow me to do it. ( the units are not identical.)
My further investigation showed me that Phoenix inverters use Multiplus microprocessors. unit.
The reason I cannot parallel the units is that in one inverter I have a Multiplus 48V 5kVA 70-100 chip and in the other unit I have a Multiplus 48V 5kVA 70-50 chip.
That means I have chips that relate to a Multiplus with a 100 Amp transfer switch and a 50 Amp transfer switch respectively. However Phoenix inverters do not have transfer switches at all.
So I cannot parallel these units because the software disqualifies me for differences in the size of transfer switches that are redundant functionality in a Phoenix inverter.
There is no indication of this rating in the Phoenix manual, (why would there be it doesn't have a transfer switch?), and no physical indication on the unit. My suppliers re-ordered the second incompatible phoenix using the same order code as the first. The difference only becomes apperent when the software cross-references the serial numbers.
Yes, the Multiplus units call attention to the transfer switch rating, but these aren't Multiplusses,
These Phoenix inverters were chosen specifically for there ability to be paralleled, a big Victron selling point.
Somebody didn't consider the law of unintended consequences when using the Multiplus chip in a Phoenix inverter.
This has been an extremely inconvenient experience, it will be 10 months before I am back in this country to recommission the replacement unit.
I commission protection relays for a living, and have experience with all the big name offerings, and a career of realistic expectations of equivalent products.
I know that with this sort hidden incompatibility issue the onus is on the manufacturer to put it in big bold writing in the Phoenix manual at the very least.
Somebody dropped the ball.