wow, it took 3hours to read this topic... its been a while ago since i posted here... however, its hard to get into the technical details with so much text... To contribute, i tried to draw agt's setup.. And i might also start to experiment with my microinverter. I use 48VDC BB with a NTC-4.0 as...
diy06.JPG, this look like what im trying to do but i working with 48vdc battery bank, does your setup still work? I cant see any fuses to protect the batteries or the inverter, how do you current protect the circuit? how high is your current when you start the setup?
startup outside mppt range, burn with 2ohm resistor until ac power starts..
44v/2ohm= 22A (Imax on microinverter 25A)
44v*22a = 968W
...how do you burn that? using powerresistor? for how long?
Battery voltage will slowly go down, do you prevent the microinverter mppt using boost/buck...
ok, you use the one on the dc/dc converter. Somehow my fuse seems allways to blow :( tried lower the current limiter to what i guess, is half. will try to use a powerresistor