A1 Guaranteed Heating Air
Recently activeSolar installer based in California · installer record #181 resolved from 147 public installation records.
Data through: California through Aug 2026 (monthly state program data).
At a glance
A1 Guaranteed Heating Air is a solar installer with 147 recorded installations totalling 724 kW, dated 2013 to 2024. All of its records are in California, where it ranks 1083rd of 6,010 profiled installers by volume and 1,774th of 10,537 nationally. The median installed price across 130 priced systems from all years is $3.89/W before incentives.
Track record
Install volume by year
Recorded installs per year; prices by year are in the table below.
Pricing
Price by year (solar only)
| Year | Priced systems | A1 Guaranteed Heating Air | California median | vs state |
|---|---|---|---|---|
| 2023 | 6 | $3.68/W | $4.06/W | −9% |
| 2022 | 7 | $3.55/W | $4.11/W | −14% |
| 2021 | 6 | $3.43/W | $3.98/W | −14% |
| 2020 | 15 | $4.31/W | $3.97/W | +9% |
| 2019 | 15 | $3.80/W | $3.95/W | −4% |
| 2018 | 25 | $3.69/W | $4.01/W | −8% |
| 2017 | 22 | $4.16/W | $4.05/W | +3% |
| 2016 | 16 | $3.76/W | $4.37/W | −14% |
| 2015 | 10 | $3.98/W | $4.58/W | −13% |
Median installed price per DC watt before incentives, systems without a battery, by the year in the public record. Years with fewer than five priced systems are left out.
Why a company's own figure can differ from this one
- Timing. These prices come from state incentive filings, published about once a year, so the latest full year here is 2025. Prices moved down in many states after 2023; a company's current quotes can be lower (or higher) than its last full year on record.
- Dates. A filing is dated when the program processed it, not when the job was sold, so jobs can land in a different month or year than in the company's own books.
- What the price includes. The filed price is the whole project as reported to the program, which can include loan dealer fees, electrical panel upgrades or roof work. A company's internal figure often leaves those out.
- Batteries. Systems flagged with a battery are excluded here; a battery the filing didn't flag can still raise a year's median.
Equipment
Module, inverter and battery brands
Latest records
Most recent recorded installs
| Date | Location | Size | Price | Ownership |
|---|---|---|---|---|
| Feb 12, 2024 | Fairfield, CA | 7.4 kW | $16,330 | Host-owned |
| Jan 30, 2024 | Concord, CA | 1.1 kW | $1 | Host-owned |
| Jan 29, 2024 | Vallejo, CA | 5.9 kW | $17,760 | Host-owned |
| Nov 16, 2023 | Napa, CA | 1.8 kW | $5,144 | Host-owned · battery |
| Jun 16, 2023 | Vallejo, CA | 4.1 kW | $15,520 | Host-owned |
| May 27, 2023 | Vallejo, CA | 6.7 kW | $23,675 | Host-owned |
| Feb 22, 2023 | Benicia, CA | 7.8 kW | $35,887 | Host-owned |
| Feb 21, 2023 | Lafayette, CA | 5.9 kW | $22,500 | Host-owned |
| Feb 13, 2023 | Benicia, CA | 4.1 kW | $14,000 | Host-owned |
| Feb 9, 2023 | Berkeley, CA | 7 kW | $24,605 | Host-owned |
See all 147 installations →searchable & filterable; export to CSV with a free account
Service geography
- California
- 147
Busiest cities
Record
- Installer ID
- PC-181
- First recorded install
- Nov 6, 2013
- Last recorded install
- Feb 12, 2024
- Priced records
- 130
Is this your company?
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How does A1 Guaranteed Heating Air compare with other installers in California?
By recorded installations A1 Guaranteed Heating Air ranks 1083rd among the 6,010 installers based in California with five or more records. Its all-years median price of $3.89/W is roughly in line with the California median of $4.26/W. Its median system, 4.8 kW, is about 19% below the state median of 5.9 kW. 0% of its recorded installations are third-party owned (lease or power-purchase agreement), against 29% across California. 4% include battery storage, compared with 16% of California records. Installers of similar recorded volume in California include Quantum Solar Solutions (148), R E Pierro Construction (148) and Kelsie Castro (148).
How has A1 Guaranteed Heating Air's installation volume changed?
A1 Guaranteed Heating Air's earliest dated installation on record is from 2013. It has recorded installations in 12 calendar years. The busiest year was 2018, with 25 installations. 2024, its latest year with records, has 3. Its median price per watt moved from $3.98/W in 2015 to $2.60/W in 2024. The most recent recorded installation is dated Feb 12, 2024.
Where does A1 Guaranteed Heating Air install solar?
All recorded installations are in California. The cities with the most of its installations are Vallejo, CA (46), Fairfield, CA (15), Vacaville, CA (14), Napa, CA (12) and Benicia, CA (10).
Frequently asked questions
How many solar installations has A1 Guaranteed Heating Air completed?
PanelCensus records 147 installations by A1 Guaranteed Heating Air, from Nov 6, 2013 to Feb 12, 2024, totalling 724 kW of capacity. Public reporting varies by state, so the company's true total may be higher.
What does A1 Guaranteed Heating Air charge for solar?
The median installed price across 130 priced systems from all years is $3.89/W before incentives (median system 4.8 kW, about $18,184). The California median is $4.26/W. Prices are the total project cost reported to state programs, so they can include work billed with the solar.
Where does A1 Guaranteed Heating Air install solar?
All 147 recorded installations are in California, the most of them in Vallejo.
Is A1 Guaranteed Heating Air still installing solar?
The most recent installation attributed to A1 Guaranteed Heating Air in the public records is dated Feb 12, 2024; 2024 has 3 recorded installations. Records here run California through Aug 2026 (monthly state program data), so the newest installations may not appear yet.
Does A1 Guaranteed Heating Air install leased or PPA solar systems?
0 recorded installations by A1 Guaranteed Heating Air (0%) are third-party owned — a lease or power-purchase agreement; across California the share is 29%.
Does A1 Guaranteed Heating Air install battery storage?
6 recorded installations by A1 Guaranteed Heating Air (4%) include a battery.
Related installers and places
- All solar installers in California· 6,010 profiles
- Solar installations in California· 2,408,542 records
- Quantum Solar Solutions· 148 installations
- R E Pierro Construction· 148 installations
- Kelsie Castro· 148 installations
- Calzona Solar· 147 installations
- Fresco Solar· 147 installations
- Eco Technology· 146 installations
Dataset updated . Sources: LBNL Tracking the Sun (through 2025), monthly state program records (California DGStats, NYSERDA, NJ Clean Energy, Illinois Shines) and permit records; installer resolved by exact-normalized name matching and, for state program records, by the systems both sources share.
About this data
Source: Lawrence Berkeley National Laboratory's Tracking the Sun, merged with city permit records, state incentive programs and the USGS U.S. Large-Scale Solar Photovoltaic Database / EIA-860 plant registers, as published September 21, 2026 — PanelCensus refreshes it as each source publishes new records. See the methodology for how records are matched, cleaned and scored.
Cite as: PanelCensus, “A1 Guaranteed Heating Air, solar installer (California)”, https://panelcensus.com/installers/california/a1-guaranteed-heating-air-181 (data as of September 21, 2026).