Happy new year! Our system was PTO'd on Tuesday this week. 32x 340W panels (10.88 kW), SE10000H inverter, 3x Powerwalls. Here is a picture of the layout:
It's only been four days since we activated the system, but I'm concerned with the solar production so far. We live in a two story home in Phoenix, AZ. There are no trees or homes nearby to cast any shade on the panels.
Wednesday was our first full day of solar production. It was very sunny with not a cloud in sight. The solar production curve you see below is smooth, but total production was only 20.7 kWh for the day, with a peak of 3.5 kW.
Yesterday was a little overcast so the solar production curve is a little jaggy, and total production was only 14.3 kW with a similar peak of 3.5 kW.
Today was another day with zero clouds and production was only 20.2 kWh, with a peak of 3.4 kW.
I realize that the physical layout is a little funky due to the hip and valley roof, and that we're in the middle of winter when the sun is low. But these numbers still seem underwhelming for a system that borders on 11 kW capacity.
When I plug in our system configuration into the PVWatts Calculator, the yearly production estimate from NREL lines up with the one provided by Tesla in their system layout document (~17,500 kWh). However the PVWatts estimate for December is 27 kWh/day -- 33% higher than we're generating so far.
Additionally when I look at a handful of ~10 kW systems in my area on SolarEdge's public monitoring site, those systems show a similar production curve for today, but produced between 37 and 45 kWh, with peaks between 5.6 and 6.8 kW. That is considerably higher than what we've been producing so far, despite these being similar-sized systems in the same geographical area.
I'm going to call Tesla on Monday to ask for a SolarEdge account and see if I can get monitor the production of each panel a little more closely... Anything else you would recommend looking into?
I know this was a bit long, thanks for reading!
It's only been four days since we activated the system, but I'm concerned with the solar production so far. We live in a two story home in Phoenix, AZ. There are no trees or homes nearby to cast any shade on the panels.
Wednesday was our first full day of solar production. It was very sunny with not a cloud in sight. The solar production curve you see below is smooth, but total production was only 20.7 kWh for the day, with a peak of 3.5 kW.
Yesterday was a little overcast so the solar production curve is a little jaggy, and total production was only 14.3 kW with a similar peak of 3.5 kW.
Today was another day with zero clouds and production was only 20.2 kWh, with a peak of 3.4 kW.
I realize that the physical layout is a little funky due to the hip and valley roof, and that we're in the middle of winter when the sun is low. But these numbers still seem underwhelming for a system that borders on 11 kW capacity.
When I plug in our system configuration into the PVWatts Calculator, the yearly production estimate from NREL lines up with the one provided by Tesla in their system layout document (~17,500 kWh). However the PVWatts estimate for December is 27 kWh/day -- 33% higher than we're generating so far.
Additionally when I look at a handful of ~10 kW systems in my area on SolarEdge's public monitoring site, those systems show a similar production curve for today, but produced between 37 and 45 kWh, with peaks between 5.6 and 6.8 kW. That is considerably higher than what we've been producing so far, despite these being similar-sized systems in the same geographical area.
I'm going to call Tesla on Monday to ask for a SolarEdge account and see if I can get monitor the production of each panel a little more closely... Anything else you would recommend looking into?
I know this was a bit long, thanks for reading!
