Between 2023 and 2025, 1,918 home solar systems were installed in Sunnyvale by 177 different companies. Tesla installed the most (264, or 14% of the local market), followed by Sunrun (246) and Cinnamon Solar (51). 15% of the systems were leased or financed through a power purchase agreement; the rest were bought outright. Every company in the ranking was still installing in 2025; installers that have since closed are left out.
Top 10 Solar Companies in Sunnyvale by Home Installations
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Serves Sunnyvale, CA · no office address listed
- Most installations
- Mostly sells systems you own
- Most battery installs
- Typical system
- 6.8 kW
- Median price (owned)
- $4.72/W
- Leased / PPA
- 0%
- With battery
- 80%
Tesla mostly sells systems the homeowner owns, paid in cash or with a loan. Its most common setup here pairs Hanwha Q CELLS panels with Tesla inverters. 80% of its systems here include a home battery. Its median price for an owned system, $4.72/W, is 11% above the Sunnyvale median of $4.25/W. A typical system is 6.8 kW, about 17 panels, and it has installed in Sunnyvale since 2001. It is also among the top installers in 84 other cities we rank, including Fremont and San Mateo.
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Serves Sunnyvale, CA · no office address listed
- Mostly leases & PPAs
- Typical system
- 5.5 kW
- Median price (owned)
- $4.05/W
- Leased / PPA
- 82%
- With battery
- 66%
Sunrun mostly sells leases and power purchase agreements: 82% of its systems here were leased or on a PPA, so the homeowner pays monthly and doesn't own the panels. Its most common setup here pairs JA Solar panels with SolarEdge inverters with power optimizers. 66% of its systems here include a home battery. Its median price for an owned system, $4.05/W, is close to the Sunnyvale median. A typical system is 5.5 kW, about 14 panels, and it has installed in Sunnyvale since 2000. It is also among the top installers in 107 other cities we rank, including Bakersfield and San Diego.
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- Mostly sells systems you own
- (408) 883-7000
- cinnamon.energy
- 809 University Ave, Los Gatos, CA 95032
- Typical system
- 6.8 kW
- Median price (owned)
- $5.81/W
- Leased / PPA
- 0%
- With battery
- 71%
Cinnamon Solar mostly sells systems the homeowner owns, paid in cash or with a loan. Its most common setup here pairs REC Group panels with Enphase microinverters. 71% of its systems here include a home battery. Its median price for an owned system, $5.81/W, is 37% above the Sunnyvale median of $4.25/W. A typical system is 6.8 kW, about 17 panels, and it has installed in Sunnyvale since 2013. It is also among the top installers in San Jose.
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- Mostly sells systems you own
- Lowest median price in this list
- (707) 446-5500
- citadelrs.com
- 761 Eubanks Dr, Vacaville, CA 95688
- Typical system
- 2.8 kW
- Median price (owned)
- $2.53/W
- Leased / PPA
- 0%
- With battery
- 7%
Citadel Roofing and Solar mostly sells systems the homeowner owns, paid in cash or with a loan. Its most common setup here pairs JA Solar panels with Enphase microinverters. 7% of its systems here include a home battery. Its median price for an owned system, $2.53/W, is 40% below the Sunnyvale median of $4.25/W. A typical system is 2.8 kW, about 7 panels, and it has installed in Sunnyvale since 2002. It also works as a roofing contractor, which helps if the roof needs repairs before the panels go on. It is also among the top installers in 13 other cities we rank, including Fairfield and Tulare.
Phone from its California contractor license, CSLB #647149
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Serves Sunnyvale, CA · no office address listed
- Mostly sells systems you own
- Typical system
- 6.7 kW
- Median price (owned)
- $3.01/W
- Leased / PPA
- 0%
- With battery
- 47%
Solar Optimum Design Electrical mostly sells systems the homeowner owns, paid in cash or with a loan. Its most common setup here pairs Panasonic panels with Enphase microinverters. 47% of its systems here include a home battery. Its median price for an owned system, $3.01/W, is 29% below the Sunnyvale median of $4.25/W. A typical system is 6.7 kW, about 17 panels, and it has installed in Sunnyvale since 2011. It is also among the top installers in 19 other cities we rank, including Torrance and Costa Mesa.
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- Mostly sells systems you own
- (888) 551-7652
- cleansolar.com
- 1445 Koll Cir, San Jose, CA 95112
- Typical system
- 6.9 kW
- Median price (owned)
- $4.87/W
- Leased / PPA
- 0%
- With battery
- 40%
Clean Solar mostly sells systems the homeowner owns, paid in cash or with a loan. Its most common setup here pairs REC Group panels with Enphase microinverters. 40% of its systems here include a home battery. Its median price for an owned system, $4.87/W, is 15% above the Sunnyvale median of $4.25/W. A typical system is 6.9 kW, about 17 panels, and it has installed in Sunnyvale since 2007. It is also among the top installers in San Jose.
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- Mostly sells systems you own
- (408) 583-8101
- infinium.inc
- 1190 Dell Ave Unit O, Campbell, CA 95008
- Typical system
- 5.8 kW
- Median price (owned)
- $4.25/W
- Leased / PPA
- 0%
- With battery
- 40%
Infinium Solar mostly sells systems the homeowner owns, paid in cash or with a loan. Its most common setup here pairs REC Group panels with Enphase microinverters. 40% of its systems here include a home battery. Its median price for an owned system, $4.25/W, is close to the Sunnyvale median. A typical system is 5.8 kW, about 15 panels, and it has installed in Sunnyvale since 2018. It is also among the top installers in San Jose.
Phone from its California contractor license, CSLB #1031953
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- Mostly sells systems you own
- (619) 715-4054
- sempersolaris.com
- 1805 John Towers Avenue, El Cajon, CA 92020
- Typical system
- 5.4 kW
- Median price (owned)
- $4.64/W
- Leased / PPA
- 0%
- With battery
- 61%
Semper Solaris mostly sells systems the homeowner owns, paid in cash or with a loan. Its most common setup here pairs Silfab Solar panels with Enphase microinverters. 61% of its systems here include a home battery. Its median price for an owned system, $4.64/W, is 9% above the Sunnyvale median of $4.25/W. A typical system is 5.4 kW, about 14 panels, and it has installed in Sunnyvale since 2013. It is also among the top installers in 24 other cities we rank, including Oceanside and San Diego.
Phone from its California contractor license, CSLB #978152
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Serves Sunnyvale, CA · no office address listed
- Mostly leases & PPAs
- Typical system
- 6.1 kW
- Leased / PPA
- 81%
- With battery
- 62%
Bright Planet Solar mostly sells leases and power purchase agreements: 81% of its systems here were leased or on a PPA, so the homeowner pays monthly and doesn't own the panels. Its most common setup here pairs Hanwha Q CELLS panels with SolarEdge inverters with power optimizers. 62% of its systems here include a home battery. A typical system is 6.1 kW, about 15 panels, and it has installed in Sunnyvale since 2001. It is also among the top installers in 69 other cities we rank, including Stockton and Chula Vista.
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- Mostly sells systems you own
- (650) 771-0700
- yourenergysolutions.com
- 290 Rickenbacker Circle, Livermore, CA 94551
- Typical system
- 7.0 kW
- Median price (owned)
- $4.10/W
- Leased / PPA
- 0%
- With battery
- 46%
Your Energy Solutions mostly sells systems the homeowner owns, paid in cash or with a loan. Its most common setup here pairs Hyundai Energy Solutions panels with Enphase microinverters. 46% of its systems here include a home battery. Its median price for an owned system, $4.10/W, is close to the Sunnyvale median. A typical system is 7.0 kW, about 17 panels, and it has installed in Sunnyvale since 2009. It is also among the top installers in 3 other cities we rank, including Fremont and Oakland.
Phone from its California contractor license, CSLB #928652
Comparing quotes in Sunnyvale?
Divide each quote's total, before incentives, by the system size in watts. Homeowners in Sunnyvale who bought their system paid a median of $4.25/W in 2023–2025. Reject any 2026 quote that subtracts a 30% federal tax credit from a purchase: that credit ended in 2025.
How to check a solar quote →Solar Battery Installers in Sunnyvale
854 of the 1,918 home solar systems installed in Sunnyvale in 2023–2025 (45%) included a home battery, put in by 114 companies. These installed the most:
| Installer | With battery | Of its installs | Median price | Leased / PPA |
|---|---|---|---|---|
| 1. Tesla | 211 | 80% | $4.96/W | 0% |
| 2. Sunrun | 163 | 66% | — | 93% |
| 3. Cinnamon Solar | 36 | 71% | $6.56/W | 0% |
| 4. Bright Planet Solar | 23 | 62% | — | 78% |
| 5. Semper Solaris | 23 | 61% | — | 0% |
- Most common battery: Tesla (61% of those with a known brand), then Enphase Energy (18%).
- What a battery adds: owned systems with one had a median of $5.28/W, against $4.25/W for all home systems in Sunnyvale. The recorded price includes the battery, so the gap (+1.03 $/W on a 6.4 kW system) is roughly what it cost.
- Battery on most of their jobs: Tesla (80%), Sunrun (66%), Cinnamon Solar (71%), Bright Planet Solar (62%), Semper Solaris (61%), Cobalt Power Systems (59%). The others add one on some jobs, not by default.
- Lowest median price among them: Solar Optimum Design Electrical, at $2.60/W for systems the homeowner bought.
Ask whether a battery quote backs up the whole house or only a subpanel, and size it from your bills: one 13 kWh battery covers essentials overnight, not central air. Under California's Net Billing Tariff (from April 2023) exported solar earns little, so storing it for evening use is what makes a battery pay. More in Tesla Powerwall installation.
Home Solar in Sunnyvale by the Numbers
Based on 1,918 residential systems installed in Sunnyvale between 2023 and 2025, as reported to utilities and state agencies.
Most-installed panel brands
- Hanwha Q CELLS
- REC Group
- SunPower
Most-installed inverter brands
- Enphase Energy
- Tesla
- SolarEdge
How these brands compare nationwide: share, price and leasing →
Home installations per year
Median price of owned systems by year: 2020: $3.91/W · 2021: $3.86/W · 2022: $4.12/W · 2023: $4.20/W · 2024: $4.53/W · 2025: $4.60/W.
Solar Panel Repair in Sunnyvale
When a system stops producing, the best first call is an established local company. The companies ranked above installed systems in Sunnyvale through 2025, so they know the equipment on local roofs. Many will service a system they didn't install, but not all — ask before you book, and expect a diagnostic fee.
44% of the home systems installed here in 2023–2025 use Enphase Energy inverters, followed by Tesla (23%). Enphase systems use a microinverter under each panel, so one failure usually knocks out a single panel and the monitoring app shows which one. Systems with a central (string) inverter — SolarEdge and others — stop producing entirely when that inverter fails; a dark screen or an error code on the unit on your wall is the usual sign.
Checks to do before you call anyone: solar troubleshooting guide. Storm damage, a roof leak or a burning smell: what to do first.
Installers That Closed or Went Bankrupt in Sunnyvale
At least 781 home solar systems in Sunnyvale were installed by companies that have since closed, liquidated or filed for bankruptcy. They are left out of the ranking above. If one of them installed your system, its workmanship warranty is likely gone — but panel and inverter warranties come from the manufacturer and usually survive the installer.
- SunPower486 systems in Sunnyvale
Filed for Chapter 11 bankruptcy in August 2024. Its assets were sold off. The SunPower brand now belongs to Complete Solaria, a different company that renamed itself SunPower in 2025. Source: Utility Dive
- PetersenDean91 systems in Sunnyvale
Filed for Chapter 11 bankruptcy in June 2020; its assets were sold in 2021. Source: Solar Power World
- RGS Energy66 systems in Sunnyvale
Exited home solar installation in 2019 and filed for Chapter 7 bankruptcy in 2020. Source: Solar Power World
- Sungevity61 systems in Sunnyvale
Sungevity filed for Chapter 11 bankruptcy in March 2017. Source: Solar Power World
- Freedom Forever44 systems in Sunnyvale
Filed for Chapter 11 in April 2026; converted to Chapter 7 liquidation in August 2026. Source: pv magazine USA
- Infinity Energy33 systems in Sunnyvale
Ceased operations in 2023. Source: Forme Solar
- Heliofarm57 systems in Sunnyvale
No installations recorded anywhere in California after 2023 (records run through 2025). That does not by itself mean the company closed — check before relying on it for service.
- REC Solar Commercial39 systems in Sunnyvale
No installations recorded anywhere in California after 2020 (records run through 2025). That does not by itself mean the company closed — check before relying on it for service.
- Sunpower By Provoltz32 systems in Sunnyvale
No installations recorded anywhere in California after 2019 (records run through 2025). That does not by itself mean the company closed — check before relying on it for service.
- Horizon Energy Systems25 systems in Sunnyvale
No installations recorded anywhere in California after 2018 (records run through 2025). That does not by itself mean the company closed — check before relying on it for service.
- Quick Systems25 systems in Sunnyvale
No installations recorded anywhere in California after 2019 (records run through 2025). That does not by itself mean the company closed — check before relying on it for service.
- Mc Solar Engineering24 systems in Sunnyvale
No installations recorded anywhere in California after 2010 (records run through 2025). That does not by itself mean the company closed — check before relying on it for service.
See the full list of solar companies that went out of business and what still works if yours is one of them.
Solar in Sunnyvale: Common Questions
Who installs the most solar panels in Sunnyvale?
In the most recent three years of records (2023–2025), Tesla installed 264 home systems in Sunnyvale, more than any other company. Sunrun (246) and Cinnamon Solar (51) came next. Volume shows local experience, not workmanship, so compare quotes and reviews before choosing.
How much does a solar system cost in Sunnyvale?
Homeowners who bought their system outright paid a median of $4.25/W before incentives, and the typical system was 6.0 kW — about $25,500 in total. Prices vary by installer: in the ranking above, the median ranges from $2.53/W to $5.81/W.
Do most people in Sunnyvale buy or lease their panels?
85% bought their system and 15% leased it or signed a power purchase agreement (PPA). With a lease or PPA you pay little upfront, but you don't own the panels and the savings are smaller over the contract. Some installers sell almost only one way — check the "Leased / PPA" figure for each company in the ranking.
Who repairs solar panels in Sunnyvale?
Start with the companies in the ranking above: Tesla, Sunrun and Cinnamon Solar did the most work here, and an installer that knows the equipment on local roofs can usually diagnose a fault faster. If your system was leased or is on a PPA, call the company you pay each month first — maintenance is normally its job.
Can I still get the federal solar tax credit in 2026?
Not as a homeowner buying the system: the 30% residential credit (Section 25D) ended on December 31, 2025. Be wary of any quote that still subtracts it from the price. See our 2026 solar tax credit guide for what's left.
What if my solar installer went out of business?
Your panels and inverters are still covered by their manufacturers' warranties; what you lose is the installer's workmanship and roof-leak warranty. If the system is leased or on a PPA, the company you pay each month is usually responsible for repairs, and any active company in the ranking can take over service. See the installers that closed in Sunnyvale and what still works when an installer closes.
What do homeowners in Sunnyvale pay for electricity?
Residential customers in California pay an average of 34.74¢ per kWh, 99% above the national average. The higher the rate, the faster solar pays for itself. Source: EIA, Electric Power Monthly, Table 5.6.A.
No company pays to be listed or to rank higher, and any ad on this site is labeled. Before you sign, confirm the contractor license, insurance and recent reviews, and get at least three quotes. If a company in Sunnyvale has closed, moved or changed its phone number, tell us and we'll check it.
How This Ranking Works
Companies are ranked by the home solar systems they installed here in 2023–2025, from utility and state records; each needs at least 10 local installations and must still have been installing in 2025. Closed or bankrupt companies are removed and listed separately. The count shows local experience, not workmanship or service.
Source: Tracking the Sun, Lawrence Berkeley National Laboratory (2026 edition), licensed CC BY 4.0. In New York and New Jersey, recent years come from the state programs' own records (NYSERDA and New Jersey's Clean Energy Program). Company names were standardized and closures checked against news reports by Solar Power Fix. More about our methodology.
Solar system not producing in Sunnyvale?
The checks to do before you call anyone: the inverter screen, the breakers, the monitoring app and what each error code means.