Monitoring

How do I know how much solar energy my home is generating and using?

The Tesla app gives you real-time and historical visibility into your solar production and home energy usage.

What peak power output should I expect to see from my system?

At the moment when midday sun is shining, typical peak AC (alternating current) power output is 70-80% of a system’s DC (direct current) rated capacity. Many environmental factors impact the instantaneous power output of the system including time of year, time of day, weather, shade, atmospheric conditions and temperature.

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:

  1. DC SYSTEM SIZE: Gather your DC (direct current) system size from your system designs or under "System Description" on your contract.
  2. 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
  3. CALCULATE ENERGY PRODUCTION ESTIMATE: Estimated daily kWh system production= DC System Size X Seasonality Factor
  4. 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.
  5. 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.

Example: You have a 6 kW (DC) solar system. The estimated daily production for your system by season would be:

  • Summer (May, Jun, Jul): 30-42 kWh/day
  • Fall (Aug, Sep, Oct) or Spring (Feb, Mar, Apr): 18-30 kWh/day
  • Winter (Nov, Dec, Jan): 6–18 kWh/day

On June 3rd, the system produced 38 kWh. This is in line with the estimated daily production range for June (30-42 kWh/day). Based on this, the system is performing within expectations.

How can I tell that the Gateway is working correctly?

Use the Neo Gateway to monitor energy production from your solar panels:

  1. Download the Tesla app on your smartphone.
  2. Log into the Tesla app.
  3. Connect the Neo Gateway to your router.
    Use the included ethernet cable to connect the Neo Gateway to your router
  4. Turn on the Neo Gateway.
    Plug your Neo Gateway into a power strip near your router using the included power supply. The power light on top glows white.
  5. Watch for a signal.
    The Neo Gateway should be connected. If you see a WEAK SIGNAL notification, move the Neo Gateway closer to the inverter until the notification disappears.
  6. Use the Tesla app to monitor energy production in real time.

View the Solar Panels System Manual. If you have trouble setting up or troubleshooting your Neo Gateway.