How much do solar panels produce in Chatsworth?
Cali Energy measured six solar systems it installed in Chatsworth (ZIP code 91311): in 2023–2025 their panels produced a median of 1,350 kWh per kilowatt a year. That is 3% less than the 110 systems it monitors in the rest of the San Fernando Valley and Burbank, at 1,397, but the 95% interval for the gap, −21% to +6%, includes zero, so this sample does not establish a difference. For illustration, that median applied to an 8.2 kW system, the typical size among the six, gives about 11,100 kWh a year.
Month by month
Median kWh per kW of panels in each month, 2023–2025: 16 Chatsworth system-years, 237 elsewhere in the Valley and Burbank.
| Month | Chatsworth, kWh per kW | Rest of the Valley and Burbank | Difference |
|---|---|---|---|
| January | 77.1 | 79.9 | −4% |
| February | 87.9 | 86.9 | +1% |
| March | 119.8 | 120.3 | 0% |
| April | 141.0 | 143.0 | −1% |
| May | 130.5 | 140.8 | −7% |
| June | 136.5 | 146.7 | −7% |
| July | 153.3 | 159.1 | −4% |
| August | 146.2 | 144.9 | +1% |
| September | 113.8 | 115.8 | −2% |
| October | 108.0 | 108.4 | 0% |
| November | 78.4 | 77.9 | +1% |
| December | 69.5 | 70.7 | −2% |
Against the rest of the Valley, the monitored Chatsworth systems made more in February, August and November, less in seven months and about the same in March and October; the differences ran from −7% in May to +1% in February. July was the best month at 153 kWh per kW; December, at 70, gave 45% of July.
Seasonal shares differed modestly: May to July brought 31.8% of a Chatsworth system’s year and December to February 16.8%, against 32.4% and 17.1% elsewhere in the Valley.
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.
| Year | Chatsworth: systems · middle half · median | Rest of the Valley and Burbank: systems · median |
|---|---|---|
| 2023 | 5 · 1,353–1,449 · 1,424 | 65 · 1,409 |
| 2024 | 5 · 1,291–1,418 · 1,410 | 84 · 1,377 |
| 2025 | 6 · 1,240–1,395 · 1,318 | 88 · 1,408 |
Chatsworth and the rest of the Valley
San Fernando Valley places with five or more Cali Energy systems with full years, 2023–2025.
| Place | Monitored systems | Median kWh per kW a year |
|---|---|---|
| Porter Ranch | 19 | 1,524 |
| 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 Chatsworth homeowner
Annual energy-equivalent size. Dividing a year’s electricity use by about 1,350 gives the kilowatts of panels whose 2023–2025 output would have matched it on these systems: 10,000 kWh a year comes to about 7.4 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 Chatsworth systems, 1,246–1,416 kWh per kW. For a single year, use that year’s range: 1,353–1,449 in 2023, 1,291–1,418 in 2024, 1,240–1,395 in 2025. 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. Chatsworth is in the City of Los Angeles, so its rooftop systems connect to LADWP. Solar with LADWP.
Installations here. Our Chatsworth projects.
Methodology
- Sample
- Solar systems in ZIP code 91311 installed and monitored by Cali Energy, on SolarEdge or Enphase monitoring: six systems, installed from 2019 to 2024, 7.2 to 9.5 kW DC in the middle half. The sample is drawn by ZIP code, not by the neighborhood boundary.
- Comparison
- The rest of the San Fernando Valley means the Valley and Burbank ZIP codes other than 91311: 110 systems.
- 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 Chatsworth years were, and 3 of 240 elsewhere in the Valley; without the rule the medians are 1,350 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/chatsworth. 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 Chatsworth?
On the six Chatsworth systems Cali Energy monitors, a median of 1,350 kWh per kW of panels a year in 2023–2025. For illustration, that median applied to an 8.2 kW system, the typical size among them, gives about 11,100 kWh a year.
How do the monitored Chatsworth systems compare with the rest of the Valley?
No clear difference in this sample. In 2023–2025 the six Chatsworth systems Cali Energy monitors produced a median 1,350 kWh per kW a year against 1,397 on its 110 systems elsewhere in the San Fernando Valley and Burbank; the difference, −3%, has a 95% interval of −21% to +6%, which includes zero.
What is the best month for solar in Chatsworth?
On the monitored Chatsworth systems, July, at a median of 153 kWh per kW; December was the lowest at 70, 45% 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.