While researching if my solar production is producing as expected for the DC system size I purchased - I realized that Tesla removed the following seasonality factor info on 03/24/2021 to approximate estimated solar generation by month.
How can I ensure my system is working well?
System performance is measured in how many kilowatt-hours (kWh) it produces over a given period of time. A simple way to tell if the system is performing as expected is to utilize the “Daily kWh Rule-Of-Thumb” method below:
DC SYSTEM SIZE: Gather your DC (direct current) system size from your system designs or under "System Description" on your contract.
Based on the seasonality factor noted above - does it equate what the estimated solar generation you have for either Solar Roof or Solar Panels?
How can I ensure my system is working well?
System performance is measured in how many kilowatt-hours (kWh) it produces over a given period of time. A simple way to tell if the system is performing as expected is to utilize the “Daily kWh Rule-Of-Thumb” method below:
DC SYSTEM SIZE: Gather your DC (direct current) system size from your system designs or under "System Description" on your contract.
- SEASONALITY FACTOR: Systems perform differently based on the time of year and so the production estimate will vary throughout the year. Seasonality Factors are based on the knowledge that the longest day of the year is June 21st and the shortest December 21st. Use the Seasonality Factor listed below:
- Summer
- May- June-July: 5 to 7
- Fall/Spring
- August-September-October/February-March-April: 3 to 5
- Winter
- November-December- January: 1 to 3
- Summer
- CALCULATE ENERGY PRODUCTION ESTIMATE: Estimated daily kWh system production= DC System Size X Seasonality Factor
- ACTUAL ENERGY PRODUCTION: In your Tesla app, review the actual daily solar energy production for a recent full day. It's best to use a day where the cloud cover percentage is near zero.
- ANALYZE: Compare the estimate you calculated to the production. If the production is equal to or greater than the estimate, then the system is performing as expected. If the production is less than the estimated, look to see whether shading or weather are a factor and if the low performance is consistent from day to day. In winter, performance for some systems may be near zero due to a combination of shading and weather.
Based on the seasonality factor noted above - does it equate what the estimated solar generation you have for either Solar Roof or Solar Panels?