How much do solar panels produce in Simi Valley?
Cali Energy measured five solar systems it installed in Simi Valley ZIP codes 93063 and 93065, which also take in unincorporated parts of Ventura County: in 2023–2025 their panels produced a median of 1,469 kWh per kilowatt a year. That is 5% more than the 116 systems it monitors in the San Fernando Valley and Burbank, at 1,397, but the 95% interval for the gap, −9% to +8%, includes zero, so this sample does not establish a difference. For illustration, that median applied to a 5.6 kW system, the typical size among the five, gives about 8,200 kWh a year.
Month by month
Median kWh per kW of panels in each month, 2023–2025: 13 Simi Valley system-years, 253 in the San Fernando Valley and Burbank.
| Month | Simi Valley, kWh per kW | San Fernando Valley and Burbank | Difference |
|---|---|---|---|
| January | 86.3 | 79.7 | +8% |
| February | 89.2 | 86.9 | +3% |
| March | 120.6 | 120.3 | 0% |
| April | 145.8 | 143.0 | +2% |
| May | 141.8 | 140.6 | +1% |
| June | 147.0 | 146.4 | 0% |
| July | 160.5 | 158.9 | +1% |
| August | 144.8 | 144.9 | 0% |
| September | 113.0 | 115.8 | −2% |
| October | 103.4 | 108.4 | −5% |
| November | 76.8 | 77.9 | −1% |
| December | 76.5 | 70.4 | +9% |
Against the San Fernando Valley, the monitored Simi Valley systems made more in six months, less in September, October and November and about the same in March, June and August; the differences ran from −5% in October to +9% in December. July was the best month at 160 kWh per kW; December, at 76, gave 48% of July.
Seasonal shares differed modestly: May to July brought 32.6% of a Simi Valley system’s year and December to February 17.7%, against 32.3% and 17.1% in the San Fernando Valley.
By system age
All five Simi Valley systems were installed in 2021 or later. Against the 79 systems of that age in the San Fernando Valley, at 1,383, the difference is +6%, in line with the overall result.
Year by year
kWh per kW of panels, systems with a full year. Each year counts only the systems with a full year, so the yearly medians and the all-years median above come from different sets of systems. 2023 and 2025 had fewer than five Simi Valley systems with a full year and are not shown.
| Year | Simi Valley: systems · middle half · median | San Fernando Valley and Burbank: systems · median |
|---|---|---|
| 2024 | 5 · 1,350–1,442 · 1,419 | 89 · 1,379 |
Simi Valley and the San Fernando Valley
San Fernando Valley places with five or more Cali Energy systems with full years, 2023–2025, and Simi Valley for comparison.
| Place | Monitored systems | Median kWh per kW a year |
|---|---|---|
| Porter Ranch | 19 | 1,524 |
| Simi Valley | 5 | 1,469 |
| Northridge | 10 | 1,425 |
| Woodland Hills | 8 | 1,412 |
| Winnetka | 5 | 1,382 |
| Chatsworth | 6 | 1,350 |
| North Hills | 6 | 1,297 |
| North Hollywood | 10 | 1,294 |
| Tarzana | 5 | 1,290 |
| Valley Glen | 5 | 1,282 |
| Encino | 5 | 1,223 |
| Each row is the median of Cali Energy’s own installations in that place: not a random sample, not adjusted for roof direction, tilt or shade, and not a ranking of places. The 95% intervals on these pages are computed for each place separately, without adjustment for multiple comparisons. Solar production by area. | ||
For a Simi Valley homeowner
Annual energy-equivalent size. Dividing a year’s electricity use by about 1,470 gives the kilowatts of panels whose 2023–2025 output would have matched it on these systems: 10,000 kWh a year comes to about 6.8 kW. The roof, future load and the tariff decide the actual size.
Checking your own system. Compare your system’s median full year over 2023–2025 with the middle half of the monitored Simi Valley systems, 1,377–1,469 kWh per kW. For 2024 alone, use 1,350–1,442. A figure below the range is a prompt to look at shade, soiling and monitoring, not a diagnosis. See monthly production in Los Angeles.
The utility. Simi Valley is served by Southern California Edison, so its rooftop systems connect to SCE. Solar with SCE.
Installations here. Our Simi Valley projects.
Methodology
- Sample
- Solar systems in ZIP codes 93063 and 93065 installed and monitored by Cali Energy, on SolarEdge or Enphase monitoring: five systems, installed from 2021 to 2022, 5.2 to 12.8 kW DC in the middle half. The sample is drawn by ZIP code, not by the city boundary, and both ZIP codes also take in unincorporated parts of Ventura County.
- Comparison
- The San Fernando Valley figure covers Cali Energy systems in the Valley and Burbank ZIP codes, 116 systems; Simi Valley is not part of it.
- Years
- Full calendar years 2023–2025 with all twelve months reporting, under the rules of the platform comparison.
- Downtime
- Each system’s benchmark is the median of its full years 2019–2025; a 2023–2025 year below 75% of it counts as downtime and is left out. None of the Simi Valley years were, and 3 of 256 in the San Fernando Valley; without the rule the medians are 1,469 and 1,397.
- Output
- kWh per kW of DC panel capacity. Each system’s figure is the median of its full years; a place’s figure is the median across its systems. Across all 257 systems on real-world solar production in Los Angeles the same method gives 1,382; that page’s headline 1,386 is the median of their 569 system-years. Months are medians of all system-months.
- Interval
- 95% interval of the gap from 4,000 bootstrap resamples of systems, each system keeping its years together. Each place’s interval is computed on its own, without adjustment for comparing several places.
- Threshold
- Figures for fewer than five systems are not published.
https://cali-energy.com/research/cities/simi-valley. Aggregated data are free to use under CC BY 4.0 with a link to this page.Frequently asked questions
How much electricity do solar panels produce in Simi Valley?
On the five Simi Valley systems Cali Energy monitors, a median of 1,469 kWh per kW of panels a year in 2023–2025. For illustration, that median applied to a 5.6 kW system, the typical size among them, gives about 8,200 kWh a year.
How do the monitored Simi Valley systems compare with the San Fernando Valley?
Not clearly. In 2023–2025 the five Simi Valley systems Cali Energy monitors produced a median 5% more per kW than its 116 systems in the San Fernando Valley and Burbank, but the 95% interval for the gap, −9% to +8%, includes zero, so this sample does not establish a difference.
What is the best month for solar in Simi Valley?
On the monitored Simi Valley systems, July, at a median of 160 kWh per kW; December was the lowest at 76, 48% of July.
Who measured these systems?
Cali Energy, a licensed solar contractor based in Northridge (CSLB #1032379), which installed and monitors them; the method is set out above.
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Prepared by Cali Energy, October 20, 2026. Figures describe systems in our monitoring fleet and are not a guarantee of what any specific roof will produce; orientation, tilt, shade, equipment and weather change results. Not engineering, financial or utility advice. See our Content Disclaimer.