PanelCensus

Day One Solar

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Solar installer based in California · installer record #3398 resolved from 389 public installation records.

At a glance

Day One Solar is a solar installer with 389 recorded installations totalling 3.6 MW, dated 2013 to 2025. All of its records are in California, where it ranks 583rd of 6,220 profiled installers by volume and 931st of 10,536 nationally. The median installed price across 311 priced systems is $4.20/W before incentives.

Recorded installs
389
Total capacity
3.6 MW
DC nameplate
Median system
6 kW
≈ $27,457
Median price
$4.20/W
pre-incentive · 311 priced
Third-party owned
0%
lease / PPA
Battery attach
26%
First recorded
2013
Last recorded
2025

Track record

Install volume by year

2013
3
2014
27
2015
39$4.10/W
2016
29$4.15/W
2017
21$3.93/W
2018
28$3.06/W
2019
26$3.09/W
2020
29$3.58/W
2021
31$4.09/W
2022
46$4.33/W
2023
39$4.91/W
2024
38$6.56/W
2025
39$5.23/W

Bars: recorded installs · right column: this installer's median $/W that year.

Latest records

Most recent recorded installs

DateLocationSizePriceOwnership
Dec 29, 2025Santa Cruz, CA7.5 kW$36,736Host-owned · battery
Dec 29, 2025Soquel, CA9.6 kW$33,385Host-owned · battery
Dec 23, 2025Aptos, CA4.5 kW$0Host-owned · battery
Dec 8, 2025Santa Cruz, CA——Host-owned · battery
Dec 2, 2025Los Altos, CA——Host-owned · battery
Nov 20, 2025Los Gatos, CA——Host-owned · battery
Nov 14, 2025Felton, CA3 kW$10,707Host-owned · battery
Nov 13, 2025Soquel, CA5 kW$39,906Host-owned · battery
Nov 13, 2025Ben Lomond, CA5.7 kW$28,257Host-owned · battery
Nov 12, 2025Watsonville, CA9.6 kW$52,000Host-owned · battery

See all 389 installations →searchable & filterable; export to CSV with a free account

Service geography

California
395

Busiest cities

Santa Cruz, CA 206Aptos, CA 39Scotts Valley, CA 28Watsonville, CA 18Soquel, CA 18Los Gatos, CA 12Boulder Creek, CA 10Ben Lomond, CA 9

Record

Installer ID
PC-3398
First recorded install
Nov 17, 2013
Last recorded install
Dec 29, 2025
Priced records
311

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How does Day One Solar compare with other installers in California?

By recorded installations Day One Solar ranks 583rd among the 6,220 installers based in California with five or more records. Its median price of $4.20/W is roughly in line with the California median of $4.26/W. Its median system, 6 kW, is roughly in line with 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. 26% include battery storage, compared with 16% of California records. Installers of similar recorded volume in California include A R S AMERICAN RESIDENTIAL SERVICES OF CALIFORNIA INC (393), Progressive Power Group (392) and Bratton Solar (389).

How has Day One Solar's installation volume changed?

Day One Solar's earliest dated installation on record is from 2013. It has recorded installations in 13 calendar years. The busiest year was 2022, with 46 installations. 2025, its latest year with records, has 39. Its median price per watt moved from $4.10/W in 2015 to $5.23/W in 2025. The most recent recorded installation is dated Dec 29, 2025.

Where does Day One Solar install solar?

All recorded installations are in California. The cities with the most of its installations are Santa Cruz, CA (206), Aptos, CA (39), Scotts Valley, CA (28), Watsonville, CA (18) and Soquel, CA (18).

Frequently asked questions

How many solar installations has Day One Solar completed?

PanelCensus records 389 installations by Day One Solar, from Nov 17, 2013 to Dec 29, 2025, totalling 3.6 MW of capacity. Public reporting varies by state, so the company's true total may be higher.

What does Day One Solar charge for solar?

The median installed price across 311 priced systems is $4.20/W before incentives (median system 6 kW, about $27,457). The California median is $4.26/W.

Where does Day One Solar install solar?

All 389 recorded installations are in California, the most of them in Santa Cruz.

Is Day One Solar still installing solar?

The most recent installation attributed to Day One Solar in the public records is dated Dec 29, 2025; 2025 has 39 recorded installations. Records reach PanelCensus months to a couple of years after installation, so recent activity may not appear yet.

Does Day One Solar install leased or PPA solar systems?

0 recorded installations by Day One Solar (0%) are third-party owned — a lease or power-purchase agreement; across California the share is 29%.

Does Day One Solar install battery storage?

103 recorded installations by Day One Solar (26%) include a battery.

Related installers and places

Dataset updated . Sources: LBNL Tracking the Sun + permit and program records; installer resolved by exact-normalized name matching.

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, “Day One Solar, solar installer (California)”, https://panelcensus.com/installers/california/day-one-solar-3398 (data as of September 21, 2026).