I have been looking into the Enphase set up for a few months now. I have several used BP panels that I would like to put to use. The problem is that they are different wattages. If my understanding is correct though the Enphase micro inverters don't care what the individual panels are rated at. What I am still a little confused on is the
Enphase EMU. Did you need one with your installation? Is it required?