Dgd,
These grid tie inverters have some odd foibles.
They under report the power they make, sometimes by as much as 15% or more. If they claim to be doing say 1300 watts , they are in fact doing 1400 watts or more.
I have checked these with 3 different watt meters, and they all agree.... the clincher is that when the solar drops off below 100 watts or so,it reports wild figures for the input current and the input wattage... they go negative ( actually say things like 300000 amps etc, ie gone below zero and around the clock again.)
They still function normally, and report the output figures as positive, but under report... worse as the power goes up.
They under report the power inputs as well, and the watt hours... whoever calibrated the current adc did not do a good job of it.
They island properly and do everything else very well, but be warned, design the system so that the panels will not over power the current into them, as they will report a fault, and go off line, rather than just raising the voltage, and shedding the excess power.... or simply even just turning off and trying to start again, they can stay turned off instead until the next day if they experience over current from the panels.... thats the only annoying thing if you have been overzealous in your panel selection.... simply software silliness from some idiot programmer.
Nicely built, and have worked flawlessly but for those observations...... cloud lensing is not your friend if you have gone skinny on the margins.
....................oztules
Other than that, they seem fine