I only have micro's IQ7's Enphase. Hmmm, now I need to bug you a little more.....
You have 2 units? 8kw?
I have 2x MR 8K units, but only 1 hooked up atm with 24kWh batteries
So what is the pass through power limit?
According to the manual you put #10 wire between the inverter and the grid.
#10 THHN 90C wire is supposed to go up to 40 amp but all kinds of things happen when you put multiple wires together in a conduit including derating of the temperature. 75C -> 35 amps, 60C -> 30 amps.
The units (on-grid) ratings:
So once the batteries are charged
and no load from house
and full PV hookedup up (up to 12kW) it technically could push nearly 37 amps to the grid. The manual does not specify the rating of pass-through but I doubt is has a larger than 50 amp relay in it.
So you I have to asume you can not push 3000 watt /240 volt = 12.5amp AC coupled micro inverters connected to the GENERATOR hookup extra to the grid.
( At this moment I'm thinking you have like 15kw of panels).
That is about right ;-)
Hoping I will have no problem with a measly 6kw of panels.
6000/240 = 25 amps of micro inverter power around noon.
I do like the idea of an auto transfer switch,
Yep
Just like a auto generator transfer switch. I was wondering they same thing just as a double safety to make sure there's not any back feeding in a grid down.
That is already built in the MR.
When grid goes down, a relay opens the wires to the grid and the load is powered by PV panels and/or batteries and/or generator.
Are the sting inverters then powering the Megarevo? 2 separate systems that can feed the grid.
Don't understand the question.
I currently have:
12 enphase micro inverters
3 IQ8 micro inverters
fronius string inverter on a DC-solar trailer with additional
Are you powering at night off a battery bank also?
Yes
This is a graph of a couple of days ago:
at night batteries go down to just above 50% during the gets recharged, after that feeding into the grid.
During that day I put 75kW back into the grid and got 0.5kWh from my utility company