David Baillie wrote:Solar only companies all too often sub out physical install then sub out electrical install seperately.
Steve, each micro inverter is an mppt charge controller and converts to AC at source so you get a panel by panel maximization. Strings of them are then daisy chained together and fed into an ac junction box then to the panel. There are a lot of rules about rapid shut down and arc fault protection that are making it very hard to run long strings of panels on roofs and feed them to a single inverter. You have to use maximisers on each panel at this point so you might as well go micro inverters right off the bat.
Steve Harvey wrote:By micro converters, are these just pwm charge controllers with built-in inverters for each individual panel? Why not just run all the panels into an mppt grid tie inverter? I feel like an mppt string inverter would be more efficient than a bunch of pwm inverters, unless the panels are subject to partial shade at times, but if not the mppt string would be the way to go for simplicity and efficiency.
Did they mess up the voltage or amperage for the micro's and install them without knowing what the equipment was rated for, if so I would kick them to the curb for not checking what devices they were hooking up, who knows what else they aren't checking.
They let it snow inside all of the microinverter connectors. I asked them about this and they said it was fine and they would dry out.