A year of solar production in one image

[offandonagain]

I wrote a script to download data using the Tesla API and used it to generate these charts.

Some observations:

• Lots of pre-PTO curtailment until mid-August when we finally got PTO. I still managed to get full production on some days by charging my EV from solar and avoiding curtailment.
• Winter production was even lower than usual since all my panels are north-facing.
• Inverter clipping at 7.6kW, but overall it's only a ~2% reduction in yearly production (based on PVWatts).
• The system has a yearly production of ~15MWh (12.8kW array, SF Bay Area)

 

[getakey]

Thats really good production for all North facing. I have East and West 11.8 kW system that produces almost exactly 15 MWh yearly in Sacramento area. You probably have more efficiency in the summer than I do because of the heat here

 

[aesculus]

Thats really good production for all North facing. I have East and West 11.8 kW system that produces almost exactly 15 MWh yearly in Sacramento area. You probably have more efficiency in the summer than I do because of the heat here

Anything above about 90F and things go downhill quickly, even with free standing solar panels, in my experience.

 

[schettj]

6.18 MWh in 2022 from my wee 4.2kW array east/west in Santa Cruz

 

[Need]

I wrote a script to download data using the Tesla API and used it to generate these charts.

Some observations:

• Lots of pre-PTO curtailment until mid-August when we finally got PTO. I still managed to get full production on some days by charging my EV from solar and avoiding curtailment.
• Winter production was even lower than usual since all my panels are north-facing.
• Inverter clipping at 7.6kW, but overall it's only a ~2% reduction in yearly production (based on PVWatts).
• The system has a yearly production of ~15MWh (12.8kW array, SF Bay Area)

Interesting to see the difference between SF and SoCal. I was looking at the little bell curves and think "wow there're a lot of cloudy days". I have a 12kW system and last year (my 5th year of installing the system) the yearly production was 21.6MWh. My panels are south facing.

 

[offandonagain]

Interesting to see the difference between SF and SoCal. I was looking at the little bell curves and think "wow there're a lot of cloudy days". I have a 12kW system and last year (my 5th year of installing the system) the yearly production was 21.6MWh. My panels are south facing.

It was a very wet winter in NorCal (finally!).
But most of my production losses are from north roof orientation (~20% loss) and some tree shading in the morning and evening (another ~10%).

 

[zƬesla]

Here's what one year's production looks like in northern NH. I lose almost a half day in winter due to tree shading. 17.5kW in panels with 14.7kW in inverter capacity. Panels face south and I adjust the vertical throughout the year.

 

[SageBrush]

Here's what one year's production looks like in northern NH. I lose almost a half day in winter due to tree shading. 17.5kW in panels with 14.7kW in inverter capacity. Panels face south and I adjust the vertical throughout the year.

Thanks for sharing, that is an impressive array! I don't think I have seen Northern NH data before
Nice graph too. I presume the Y axis is kWh

 

[adspguy]

I wrote a script to download data using the Tesla API and used it to generate these charts.

Some observations:

• Lots of pre-PTO curtailment until mid-August when we finally got PTO. I still managed to get full production on some days by charging my EV from solar and avoiding curtailment.
• Winter production was even lower than usual since all my panels are north-facing.
• Inverter clipping at 7.6kW, but overall it's only a ~2% reduction in yearly production (based on PVWatts).
• The system has a yearly production of ~15MWh (12.8kW array, SF Bay Area)

what did you use to generate the plot? I downloaded your script to get the data and it works great

 

[offandonagain]

what did you use to generate the plot? I downloaded your script to get the data and it works great

I used Chart.js and some code I wrote as part of a larger project I'm working on (a complete solar/powerwall dashboard based on Tesla API). I'm happy to generate the image for your data, just DM me.