PanelCensus

Efficient Builders

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Solar installer based in California · installer record #4042 resolved from 55 public installation records.

At a glance

Efficient Builders is a solar installer with 55 recorded installations totalling 390 kW, dated 2022 to 2025. All of its records are in California, where it ranks 1993rd of 6,220 profiled installers by volume and 3,262nd of 10,536 nationally. The median installed price across 55 priced systems is $6.67/W before incentives.

Recorded installs
55
Total capacity
390 kW
DC nameplate
Median system
6.9 kW
≈ $43,355
Median price
$6.67/W
pre-incentive
Third-party owned
0%
lease / PPA
Battery attach
69%
First recorded
2022
Last recorded
2025

Track record

Install volume by year

2022
1$4.62/W
2023
3$9.57/W
2024
31$6.87/W
2025
20$6.17/W

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

Latest records

Most recent recorded installs

DateLocationSizePriceOwnership
Oct 14, 2025Twentynine Palms, CA4 kW$40,000Host-owned · battery
Oct 7, 2025Los Angeles, CA4 kW$43,884Host-owned · battery
Aug 26, 2025Pico Rivera, CA4.8 kW$59,827Host-owned · battery
Aug 14, 2025Visalia, CA7 kW$74,400Host-owned · battery
Jul 2, 2025Camarillo, CA7.2 kW$38,000Host-owned · battery
May 12, 2025San Gabriel, CA9.2 kW$55,800Host-owned · battery
Apr 28, 2025South Pasadena, CA8 kW$42,000Host-owned · battery
Apr 14, 2025Lynwood, CA3.6 kW$76,450Host-owned
Apr 14, 2025Lynwood, CA4 kW$76,450Host-owned
Apr 5, 2025Compton, CA8 kW$53,684Host-owned · battery

See all 55 installations →searchable & filterable; export to CSV with a free account

Service geography

California
55

Busiest cities

Lynwood, CA 5Downey, CA 3Compton, CA 3Pomona, CA 2San Gabriel, CA 2Moreno Valley, CA 2Santa Ana, CA 2Simi Valley, CA 2

Record

Installer ID
PC-4042
First recorded install
Jun 28, 2022
Last recorded install
Oct 14, 2025
Priced records
55

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How does Efficient Builders compare with other installers in California?

By recorded installations Efficient Builders ranks 1993rd among the 6,220 installers based in California with five or more records. Its median price of $6.67/W is about 57% above the California median of $4.26/W. Its median system, 6.9 kW, is about 16% above 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. 69% include battery storage, compared with 16% of California records. Installers of similar recorded volume in California include Amaretto Enterprises (55), Bert Bartsch (55) and Earthbound Energy (55).

How has Efficient Builders's installation volume changed?

Efficient Builders's earliest dated installation on record is from 2022. It has recorded installations in 4 calendar years. The busiest year was 2024, with 31 installations. 2025, its latest year with records, has 20. Its median price per watt moved from $4.62/W in 2022 to $6.17/W in 2025. The most recent recorded installation is dated Oct 14, 2025.

Where does Efficient Builders install solar?

All recorded installations are in California. The cities with the most of its installations are Lynwood, CA (5), Downey, CA (3), Compton, CA (3), Pomona, CA (2) and San Gabriel, CA (2).

Frequently asked questions

How many solar installations has Efficient Builders completed?

PanelCensus records 55 installations by Efficient Builders, from Jun 28, 2022 to Oct 14, 2025, totalling 390 kW of capacity. Public reporting varies by state, so the company's true total may be higher.

What does Efficient Builders charge for solar?

The median installed price across 55 priced systems is $6.67/W before incentives (median system 6.9 kW, about $43,355). The California median is $4.26/W.

Where does Efficient Builders install solar?

All 55 recorded installations are in California, the most of them in Lynwood.

Is Efficient Builders still installing solar?

The most recent installation attributed to Efficient Builders in the public records is dated Oct 14, 2025; 2025 has 20 recorded installations. Records reach PanelCensus months to a couple of years after installation, so recent activity may not appear yet.

Does Efficient Builders install leased or PPA solar systems?

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

Does Efficient Builders install battery storage?

38 recorded installations by Efficient Builders (69%) 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, “Efficient Builders, solar installer (California)”, https://panelcensus.com/installers/california/efficient-builders-4042 (data as of September 21, 2026).