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New solar and Powerwall install, low production?

9/13/21 - Tech came today for service. Told him problem is on the roof, 12 panels are missing their wiring connection to the inverter. Guy spent an hour with tech support on the phone to check the wiring in the garage in the inverter and gateway, only to conclude.....problem is indeed the wiring on the roof. F*uckig told them that on the phone last month.

Now waiting to schedule another service appointment with a crew that can go on the roof.
 
Well this sad slow saga is finally over. It took 5 weeks for them to schedule a roof crew to come out, but the appointment was cancelled due to rain storm. Then I spent another 90 mins via phone to get another appointment for two weeks later.

Yesterday Telsa finally came out, got on the roof, found one string was disconnected at the junction connection for the two parallel strings, and fixed the problem in 5 mins.

It's a testament to their horrid service that it took over 7 months to fix when the likely problem and solution was so basic.

Anyway, power production the day before the fix was 3.1kW peak and 19.9kWh production.
IMG_0133.jpeg


Immediately after they connected the unconnected string at 10:45am, production instantly doubles.
IMG_0132.jpeg


And the day after the fix, it's double, 6.2kW peak and 39.9kWh production.
IMG_0131.jpeg


I'm happy now and pleasantly surprised that in the middle of fall, the system is still producing 160% of my daily consumption.
 
One last thing. Referring back to my first post and PVWatts calculations for my system and location, in Sept and Oct after PTO, production was estimated to be 1223kWH and 1093kWh respectively. With my half broken system, the Tesla app reports actual production to be 660kWh and 560kWh, so almost exactly half. PVWatts seems to be quite accurate, and is in line with production Tesla guarantees in the contract.
 
  • Informative
Reactions: BGbreeder
Good luck. Keep calling at least once a week after PTO.

And to hopefully close this story permanently, Tesla after 7 months finally replaced the dead PW in Oct 2022.

On a positive note, despite only having only 1 PW functioning through the spring and summer, I haven't paid for electricity since March when the PW broke. Not sure exactly how credits, NBC, true up credit, and a yearly energy rebate works, but all my bills since then have been negative.
 

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