I have a 8.9kva system (33 SolarWorld 270watt panels as seen in the picture in the post
here) on my roof with enphase microinverters. I get the read out of the whole system in MyEnlighten but am wondering how you pulled the readout of just these panels. I can log into the envoy via its local ip address but haven't really looked at it too much but is this where you pulled that graph from? As far as angle goes, my roof is 4:12 so it is 18ish degrees but our latitude is 33 degrees. Not optimum but the best you can do on the roof because to try to tilt them more they end up shading each other somewhat so it is better to just lay them flat. We're fortunate to have the house oriented a few degrees east of south though so that helps. We will hit transformer clipping for a few hours on a few days in April each year, proving that using 215watt microinverters on 270watt panels is a cost-effective approach because the minute extra power produced will never recover the additional cost of larger microinverters.