Hi All,
I've been going back and forth with Tesla about the output of my solar array, and thanks to this board I think I may have enough data to go back to them (again) and convince them to send someone out to check and fix it. But first some background.
My panels went in a couple of months ago, and we received PTO on June 12. I am in San Jose (very sunny), and have a 9.6kW installation with one Powerwall Plus. I requested that Tesla send me the schematics so I can see how the circuit is supposed to be connected, but haven't heard back from them after a week. But the installers told me that I have two arrays, and I recall one had only 6 or 8 of the 24 panels.
In any case, on a clear sunny day, peak production has never exceeded 5.3kW, and daily power generation has never exceeded ~45kWh - even on the clearest of sunny days, even on Tuesday last week when it hit 100F without a cloud in the sky!
I suspect there is something wrong with the installation, so I ran pypowerwall to get the string information and what I got is copied below. Here is my rookie analysis:
It looks to me like strings C and D are connected in parallel (based on their voltages being almost identical). And string B is "stand alone", i.e. one series string. But what is going on with "A"? Is this an actual string that is not functioning properly, or is really unconnected? Or could it be an unused input on the inverter that appears in the status as not connected? Is there anything else wrong here that anyone can discern from this data?
Any details anyone can provide (or corrections to my analysis above) would be appreciated, and I can always get photos of the panels if that will help.
Thanks!!!
*********************************
Battery power level: 37%
Grid Power: 1.02kW
Solar Power: 3.45kW
Battery Power: -1.88kW
Home Power: 2.30kW
{
"A": {
"Connected": false,
"Current": 0.0,
"Power": 0.0,
"State": "PV_Active",
"Voltage": -1.299999999999999
},
"B": {
"Connected": true,
"Current": 9.39,
"Power": 1629.0,
"State": "PV_Active",
"Voltage": 175.9
},
"C": {
"Connected": true,
"Current": 3.8000000000000003,
"Power": 792.0,
"State": "PV_Active",
"Voltage": 209.4
},
"D": {
"Connected": true,
"Current": 3.42,
"Power": 709.0,
"State": "PV_Active_Parallel",
"Voltage": 208.8
}
}
I've been going back and forth with Tesla about the output of my solar array, and thanks to this board I think I may have enough data to go back to them (again) and convince them to send someone out to check and fix it. But first some background.
My panels went in a couple of months ago, and we received PTO on June 12. I am in San Jose (very sunny), and have a 9.6kW installation with one Powerwall Plus. I requested that Tesla send me the schematics so I can see how the circuit is supposed to be connected, but haven't heard back from them after a week. But the installers told me that I have two arrays, and I recall one had only 6 or 8 of the 24 panels.
In any case, on a clear sunny day, peak production has never exceeded 5.3kW, and daily power generation has never exceeded ~45kWh - even on the clearest of sunny days, even on Tuesday last week when it hit 100F without a cloud in the sky!
I suspect there is something wrong with the installation, so I ran pypowerwall to get the string information and what I got is copied below. Here is my rookie analysis:
It looks to me like strings C and D are connected in parallel (based on their voltages being almost identical). And string B is "stand alone", i.e. one series string. But what is going on with "A"? Is this an actual string that is not functioning properly, or is really unconnected? Or could it be an unused input on the inverter that appears in the status as not connected? Is there anything else wrong here that anyone can discern from this data?
Any details anyone can provide (or corrections to my analysis above) would be appreciated, and I can always get photos of the panels if that will help.
Thanks!!!
*********************************
Battery power level: 37%
Grid Power: 1.02kW
Solar Power: 3.45kW
Battery Power: -1.88kW
Home Power: 2.30kW
{
"A": {
"Connected": false,
"Current": 0.0,
"Power": 0.0,
"State": "PV_Active",
"Voltage": -1.299999999999999
},
"B": {
"Connected": true,
"Current": 9.39,
"Power": 1629.0,
"State": "PV_Active",
"Voltage": 175.9
},
"C": {
"Connected": true,
"Current": 3.8000000000000003,
"Power": 792.0,
"State": "PV_Active",
"Voltage": 209.4
},
"D": {
"Connected": true,
"Current": 3.42,
"Power": 709.0,
"State": "PV_Active_Parallel",
"Voltage": 208.8
}
}
Last edited: