A1 Sun

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Solar installer based in California · installer record #186 resolved from 872 public installation records.

Recorded installs

872

Total capacity

4.3 MW

DC nameplate

Median system

4.5 kW

≈ $22,108

Median price

$4.83/W

pre-incentive

Third-party owned

lease / PPA

Battery attach

10%

First recorded

2007

Last recorded

2023

Track record

Install volume by year

2007

3$9.28/W

2008

7$7.50/W

2009

22$7.50/W

2010

18$6.52/W

2011

25$6.20/W

2012

25$5.59/W

2013

37$4.93/W

2014

29$4.54/W

2015

54$1.12/W

2016

49$4.91/W

2017

41$5.07/W

2018

77$4.79/W

2019

82$4.30/W

2020

86$4.54/W

2021

114$4.13/W

2022

93$4.61/W

2023

110$5.60/W

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

Latest records

Most recent recorded installs

Date	Location	Size	Price	Ownership
Dec 29, 2023	Berkeley, CA	7.3 kW	$29,887	Host-owned
Dec 21, 2023	Emeryville, CA	4.9 kW	$28,467	Host-owned
Dec 20, 2023	El Cerrito, CA	2.4 kW	$17,144	Host-owned
Dec 12, 2023	Oakland, CA	6.5 kW	$31,508	Host-owned
Dec 11, 2023	Piedmont, CA	5.7 kW	$49,885	Host-owned · battery
Dec 11, 2023	Berkeley, CA	9.7 kW	$37,360	Host-owned
Dec 11, 2023	Oakland, CA	3.2 kW	$19,945	Host-owned
Dec 8, 2023	Berkeley, CA	6.6 kW	$25,500	Host-owned
Dec 8, 2023	Oakland, CA	8.2 kW	$44,658	Host-owned
Dec 7, 2023	Richmond, CA	4.1 kW	$22,007	Host-owned

Service geography

California: 872

Busiest cities

Berkeley, CA 364Oakland, CA 144Berkeley, CA 69El Cerrito, CA 47Albany, CA 43Piedmont, CA 37Kensington, CA 23Richmond, CA 22

Record

Installer ID: PC-186
First recorded install: Sep 20, 2007
Last recorded install: Dec 29, 2023
Priced records: 759

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Frequently asked questions

How many solar installations has A1 Sun completed?

The Tracking the Sun dataset records 872 installations by A1 Sun, from Sep 20, 2007 to Dec 29, 2023, totalling 4.3 MW of capacity. Dataset coverage varies by state, so actual totals may be higher.

What does A1 Sun charge for solar?

The median installed price across 759 priced systems is $4.83/W pre-incentive (median system 4.5 kW, ≈ $22,108). Third-party-owned (lease/PPA) share: 0%.

Where does A1 Sun install solar?

Recorded installs span 1 state, led by California (872).

Dataset updated July 2026 . Source: LBNL Tracking the Sun public dataset; installer resolved by exact-normalized name matching.