Northwest Ext

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Solar installer based in California · installer record #8729 resolved from 116 public installation records.

At a glance

Northwest Ext is a solar installer with 116 recorded installations totalling 596 kW, dated 2009 to 2019. All of its records are in California, where it ranks 1317th of 6,220 profiled installers by volume and 2,131st of 10,536 nationally. The median installed price across 105 priced systems is $5.69/W before incentives.

Recorded installs

116

Total capacity

596 kW

DC nameplate

Median system

4.8 kW

≈ $25,017

Median price

$5.69/W

pre-incentive

Third-party owned

lease / PPA

Battery attach

First recorded

2009

Last recorded

2019

Track record

Install volume by year

2009

8$6.81/W

2010

17$6.51/W

2011

16$6.46/W

2012

11$6.21/W

2013

2$6.17/W

2015

12$4.36/W

2016

28$4.34/W

2017

16$4.41/W

2018

4$3.94/W

2019

2$4.87/W

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

Latest records

Most recent recorded installs

Date	Location	Size	Price	Ownership
May 1, 2019	Stockton, CA	3 kW	$12,150	Host-owned
Apr 3, 2019	Santa Rosa, CA	2.4 kW	$13,885	Host-owned
Nov 20, 2018	Vacaville, CA	4.3 kW	$25,000	Host-owned
Aug 13, 2018	Auburn, CA	9.4 kW	$26,000	Host-owned
May 4, 2018	American Canyon, CA	7 kW	$29,758	Host-owned
Mar 26, 2018	Riverbank, CA	6.1 kW	$21,800	Host-owned
Dec 11, 2017	Granite Bay, CA	4 kW	$18,480	Host-owned
Sep 12, 2017	Camino, CA	7 kW	$28,836	Host-owned
Aug 29, 2017	Fairfield, CA	3 kW	$21,000	Host-owned
Jul 14, 2017	Vacaville, CA	5.1 kW	$12,900	Host-owned

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Service geography

California: 116

Busiest cities

Santa Rosa, CA 15Sonoma, CA 8Vacaville, CA 8Stockton, CA 7Napa, CA 6West Sacramento, CA 5Placerville, CA 4Petaluma, CA 3

Record

Installer ID: PC-8729
First recorded install: Jun 26, 2009
Last recorded install: May 1, 2019
Priced records: 105

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How does Northwest Ext compare with other installers in California?

By recorded installations Northwest Ext ranks 1317th among the 6,220 installers based in California with five or more records. Its median price of $5.69/W is about 34% above the California median of $4.26/W. Its median system, 4.8 kW, is about 19% below the state median of 5.9 kW. 6% of its recorded installations are third-party owned (lease or power-purchase agreement), against 29% across California. 0% include battery storage, compared with 16% of California records. Installers of similar recorded volume in California include Epica (116), Funderburk Construction (116) and Jb Construction (116).

How has Northwest Ext's installation volume changed?

Northwest Ext's earliest dated installation on record is from 2009. It has recorded installations in 10 calendar years. The busiest year was 2016, with 28 installations. 2019, its latest year with records, has 2. Its median price per watt moved from $6.81/W in 2009 to $4.87/W in 2019. The most recent recorded installation is dated May 1, 2019. No installation in the public records is dated within the last three years.

Where does Northwest Ext install solar?

All recorded installations are in California. The cities with the most of its installations are Santa Rosa, CA (15), Sonoma, CA (8), Vacaville, CA (8), Stockton, CA (7) and Napa, CA (6).

Frequently asked questions

How many solar installations has Northwest Ext completed?

PanelCensus records 116 installations by Northwest Ext, from Jun 26, 2009 to May 1, 2019, totalling 596 kW of capacity. Public reporting varies by state, so the company's true total may be higher.

What does Northwest Ext charge for solar?

The median installed price across 105 priced systems is $5.69/W before incentives (median system 4.8 kW, about $25,017). The California median is $4.26/W.

Where does Northwest Ext install solar?

All 116 recorded installations are in California, the most of them in Santa Rosa.

Is Northwest Ext still installing solar?

The most recent installation attributed to Northwest Ext in the public records is dated May 1, 2019; 2019 has 2 recorded installations. Records reach PanelCensus months to a couple of years after installation, so recent activity may not appear yet.

Does Northwest Ext install leased or PPA solar systems?

7 recorded installations by Northwest Ext (6%) are third-party owned — a lease or power-purchase agreement; across California the share is 29%.

Does Northwest Ext install battery storage?

0 recorded installations by Northwest Ext (0%) include a battery.

Related installers and places

Dataset updated September 2026 . 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, “Northwest Ext, solar installer (California)”, https://panelcensus.com/installers/california/northwest-ext-8729 (data as of September 21, 2026).