Vines
Active Member
Nothing is out of the ordinary here, except things are working as designed and the answers were written in your post:
I will be interested to hear your reports once your system gets PTO, and what solar production you will see while on grid
If you look a the inverter datasheet, it does specify that it can output 32A (7,6 kW) on grid, or 40A off grid. With your permission to export set to off, and your home loads utilizing more than 10 kW, I suspect the full 40A (9.6 kW) can be generated and used by your loads. The above numbers are at 240 VAC, but more power can be produced if the grid voltages are a bit higher. I do not know if this accounts for your 10.8 kW however, and I suspect your PV CT's might be a bit optimistic. I personally haven't seen a system perform to the nameplate rating of the DC STC system size, except for very brief periods.It seems like I might be the first person to offer some evidence that the whole Overdrive idea might be real!
Background: I live in Maine and I just had my PV and Powerwall system installed by a third party. I have 10.8 kW of Solar panels, One Powerwall+, and one Powerwall. They are connected to my system with a Backup Gateway 2. My Powerwall+ has a single 7.6 kW inverter.
Last Tuesday, I was looking at my Tesla app and the system was currently generating 11 kW of energy. Here were the specific conditions:
- I was charging my Model Y so the house was using 16.7 kW
- It was a perfectly clear, cold day and my yard is covered in snow. The snow must have bounced additional light into the panels to exceed their 10.8 kW rating
- I currently have permission to export OFF
You can verify most of this information from the screenshots attached below. I didn't think it was possible to exceed the inverters 7.6 kW rating, and my understanding is that the inverter and the Powerwall do not have a direct DC connection, only AC. Maybe that's incorrect, and the inverter is sending the excess DC voltage to the Powerwall to be utilized? Also, my system hasn't clipped once in my three weeks of having this system.
I'd love to hear everyone's theories as to how this is all possible. However it's occurring, I'm so glad I have the Powerwall+ system versus using a different inverter that can't go past it's inverter rating. The sun is shining again today and my system is generating 8 kW as we speak.
I will be interested to hear your reports once your system gets PTO, and what solar production you will see while on grid