Aren't you just missing another square root of 3? You have the sum of three (current vector * voltage vector) for power; it looks like you are effectively taking current vector * voltage magnitude.
Really depends on the system. If you are in the US on a residential 120/208V large utility service it isn't a big deal for a reasonable portion of the load; same would go for a European 230V system. You get into problems if you are connecting it downstream of a small (relative to the PV)...
A always prefer for generator output to be a 3-wire system for distribution and go for a digital high resistance ground system. The value engineering option is to delete the HRG and solidly ground the unit. This eliminates all the problems with ground fault protection when both sides of a...
You can always ducter test with the boards offline, checking the micro-ohm impedance across connections. It is more work than a Thermographic survey, but safer.
The advantage to me of Thermographic surveys is that when you don't know where to look for a problem, it can jump out. When you...
