cracovian wrote:I did peak at 1.98 kW on the first day, so I was getting super close to the max of 8 x 250W and I'd expect the summer months to get there more often.
With the very rare exception due to edge-of-cloud effects, you will never hit the peak in the summertime. This is because the PV modules produce less power when they are hot. Also, if your array faces South, the sun never enters the boresight in the summertime. Instead, it goes straight overhead around here. Where you live, it may even go closer to the boresight for your NORTH-facing roof in the middle of the summer. Likely you would saturate most often in the spring when it is coldest and the sun is closest to the boresight. The sun is near the boresight also in the fall, but it is typically not as cold.
cracovian wrote:But you're totally right; if I go with cheaper 250W panels, M215s are the way to go.
Personally, I wouldn't lower the module power rating. More is better unless you are paying a fortune per watt.
cracovian wrote:Are there any other differences between the two?
cracovian wrote:I took a peak at your system and it obviously looks amazing! If I go the DIY route, should I ask my last installer to give me access to Enlighten Manager ($249 for activation?) now or later or just go directly to Enphase when it's time?
It seems they have changed some things. In the past, access to Enlighten Manager was included with the purchase of an Envoy. And now they have something coming called MyEnlighten
. I guess they're trying to make more money to try to pay for the replacements for my M190s which are failing.
cracovian wrote:How's that handled when I want to add microinverters and modify arrays myself?
Based on advice given here by Weatherman, I just asked Enphase for access to Array Builder and they gave it to me. Later I discovered that they have a FAQ for that saying you just needed to ask, but now I do not see it. This one is close.
Here is some of their training to show what Array Builder looks like: Array Builder Training videos