Updated: Apr 27, 2026
Location and Projects
Address
21558 FERRERO PKWY, Walnut, CA, 91789
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Oxford Intelligent Energy Co Ltd Solar Contractor
Oxford Intelligent Energy Co Ltd, 21558 Ferrero Pkwy, Walnut, CA (Employees: Dahai Shi, Dahai Shi, and Jorge Gabriel Ramos) holds a Contractor license and 1 other license according to the Butte County license board.
Their BuildZoom score of 109 ranks in the top 5% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Oxford Intelligent Energy Co Ltd, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Oxford Intelligent Energy Co Ltd Contact Information
Phone Number: (213) 766-0340
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Address: 21558 FERRERO PKWY, Walnut, CA 91789
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Oxford Intelligent Energy Co Ltd Walnut
Quality
109
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Oxford Intelligent Energy Co Ltd has a BuildZoom score of 109, which places them above 95% of 336,931 contractors in California.
Activity
|
28 projects
|
2025 |
|
9 projects
|
2024 |
|
6 projects
|
2023 |
Our building permit records indicate that Oxford Intelligent Energy Co Ltd has worked on at least
43.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Experience
|
38 projects
|
Solar installations |
Analyzing permits over the last 4 years shows that Oxford Intelligent Energy Co Ltd mostly works on
solar installation
projects.
Pricing
|
1 project
|
< $5k |
|
1 project
|
$5k-$20k |
|
19 projects
|
$20k-$50k |
|
2 projects
|
$50k-$100k |
|
1 project
|
$100k-$250k |
|
2 projects
|
$250k-$500k |
The typical size of their permits is approximately $32,290. This graph shows the distribution of these job values.
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
Building Permits by Oxford Intelligent Energy Co Ltd
This is a sample of this contractor's permits. Click here to access their complete permit history.
(e-plan) install new flush roof-mounted low-profile photovoltaic solar system. total solar panel modules quantity: 23 total inverters: 1 9.32 kw dc sq. ft. array area: 467.88 electrical service upgrade: no one 14.33kwh battery per approved plans. approval subject to field verification
Valuation:
$36,900
Permit #:
SPV-2025-00115
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
(e-plan) install new flush roof-mounted low-profile photovoltaic solar system. total solar panel modules quantity: 14 total inverters: 1 10.00 kw air conditioning sq. ft. array area: 467.88 electrical service upgrade: no per approved plans. with one 10.24kwh battery
Valuation:
N/A
Permit #:
SPV-2025-00039
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
8.8kw solar photovoltaic system and 0gal solar wh system (water heater installed null). all supply side connections main breaker change-out and/or panel upgrade will require a second inspection. carbon monoxide & smoke alarms required. reference crc sections r315 & r314 water conserving fixtures are required to be installed throughout this residence per sb 407 (note: residences built ... see more
Valuation:
$24,640
Permit #:
RES-2420909
Status:
expired
Fee:
$541
Permit Type:
N/A
Building Type:
N/A
(e-plan) 8.800 kw dc roof mount solar photovoltaic system with 16 - vsun solar: vsun550-144bmh-dg 550w photovoltaic modules with 08 - ap smart rsd-d-15 rapid shutdowns 01 - oxford intelligent energy: oe 7.6khs/lv (240v) inverter 01 - oxford intelligent energy: e-tank lfp- 10.24kwh battery
Valuation:
$32,290
Permit #:
SPV-2024-00069
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
(e-plan) photovoltaic solar system 8.800 kw dc roof mount with (16) vsun solar: vsun550-144bmh-dg 550w modules and (8) ap smart rsd-d-15 rapid shutdowns (1) - oxford intelligent energy oe 7.6khs/lv (240v) inverter and (1) oxford intelligent energy e-tank lfp- 10.24kwh battery
Valuation:
$32,290
Permit #:
SPV-2024-00067
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
7.150 kw dc roof mount solar photovoltaic system with 13 - vsun solar: vsun550-144bmh-dg 550w photovoltaic modules with 07 - ap smart rsd-d-15 rapid shutdowns 01 - oxford intelligent energy: oe 7.6khs/lv (240v) inverter 02 - oxford intelligent energy: e-tank lfp- 10.24kwh batteries
Valuation:
N/A
Permit #:
AD24-00532
Status:
approved
Fee:
$225
Permit Type:
N/A
Building Type:
N/A
(e-plan) 13.200 kw dc/10.00 kw air conditioning roof mount solar photovoltaic system with 24- vsun solar: vsun550-144bmh-dg 550w mono modules with 01 - oxford intelligent energy: oe 10khs/lv (240v) inverter with 02 - oxford intelligent energy: e-tank lfp- 10.24kwh batteries with upgrade main service panel to 225a rated bus with 150a main breaker. 588.28 array sf
Valuation:
$84,804
Permit #:
SPV-2023-01304
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
8.250 kw dc roof mount solar photovoltaic system with 15 - vsun solar: vsun550-144bmh-dg 550w photovoltaic modules with 08 - ap smart rsd-d-15 rapid shutdowns 01 - megarevo: r7k6lna 7.600kw (240v) inverter 01 - uhome smart energy: uhome ess stacked lfp 9.6kwh battery with upgrade main service panel to 200a rated buss with 200a main breaker
Valuation:
$27,650
Permit #:
BPA23-2038
Status:
complete
Fee:
N/A
Permit Type:
Residential
Building Type:
N/A
9.900 kw dc roof mount solar photovoltaic system with 18 - vsun solar: vsun550-144bmh-dg 550w mono modules with 10 - ap smart rsd-d-15 rapid shutdowns 01 - oxford intelligent energy: oe 7.6khs/lv (240v) inverter 02 - oxford intelligent energy: e-tank lfp- 10.24kwh batteries with upgrade main service panel to 225a rated buss with 200a main breaker
Valuation:
N/A
Permit #:
AD23-07758
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
7.150 kw dc roof mount solar photovoltaic system with 13 - vsun solar: vsun550-144bmh-dg 550w photovoltaic modules with 07 - ap smart rsd-d-15 rapid shutdowns 01 - oxford intelligent energy: oe 7.6khs/lv (240v) inverter 02 - oxford intelligent energy: e-tank lfp- 10.24kwh batteries
Valuation:
N/A
Permit #:
AD23-07738
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
9.900 kw dc roof mount solar photovoltaic system with 18 - vsun solar: vsun550-144bmh-dg 550w mono modules with 10 - ap smart rsd-d-15 rapid shutdowns 01 - oxford intelligent energy: oe 7.6khs/lv (240v) inverter 02 - oxford intelligent energy: e-tank lfp- 10.24kwh batteries with upgrade main service panel to 225a rated buss with 200a main breaker
Valuation:
N/A
Permit #:
AD23-07737
Status:
triage
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
9.900 kw dc roof mount solar photovoltaic system with 18 - vsun solar: vsun550-144bmh-dg 550w mono modules with 10 - ap smart rsd-d-15 rapid shutdowns 01 - oxford intelligent energy: oe 7.6khs/lv (240v) inverter 02 - oxford intelligent energy: e-tank lfp- 10.24kwh batteries with upgrade main service panel to 225a rated buss with 200a main breaker
Valuation:
$39,600
Permit #:
B23-18089
Status:
final
Fee:
$1,093
Permit Type:
N/A
Building Type:
N/A
Single family residence photovoltaic addendum: layout changed 7.150 kw dc roof mount solar photovoltaic system with 13 - vsun solar: vsun550-144bmh-dg 550w photovoltaic modules with 07 - ap smart rsd-d-15 rapid shutdowns 01 - oxford intelligent energy: oe 7.6khs/lv (240v) inverter 02 - oxford intelligent energy: e-tank lfp- 10.24kwh batteries
Valuation:
$28,600
Permit #:
B23-17946
Status:
final
Fee:
$1,093
Permit Type:
N/A
Building Type:
N/A
Installation of a roof mounted 7.15 kw solar system with one 14.3 kwh battery
Valuation:
$32,175
Permit #:
202503202670
Status:
triage
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Install (8) photovoltaic solar panels (est 3.24kw) flush mount on roof
Valuation:
N/A
Permit #:
SLR25-00033
Status:
issued
Fee:
$450
Permit Type:
Solar panels
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
B25-1100
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Installation of a roof-mounted solar system with one 10.2kwh battery related photovoltaic permit- bld2025-01791
Valuation:
N/A
Permit #:
BLD2025-01831
Status:
issued
Fee:
$643
Permit Type:
N/A
Building Type:
N/A
Solar - roof mount 10.80kw (27 panels) w 4 battery back ups
Valuation:
N/A
Permit #:
BP25-00357
Status:
issued
Fee:
$375
Permit Type:
N/A
Building Type:
N/A
Install (15) photovoltaic solar panels (est 8.259kw) flush mount on roof; install energy storage system - (1) 10.24kwh oxford energy battery
Valuation:
N/A
Permit #:
SLR24-00102
Status:
issued
Fee:
$489
Permit Type:
Solar panels
Building Type:
N/A
Installation of an additional 3.24kw (8) modules roof-mounted solar system rev 1 - revised solar panel layout
Valuation:
$11,500
Permit #:
BRSOLAR-25-0083
Status:
triage
Fee:
$1,018
Permit Type:
Addition
Building Type:
N/A
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Oxford Intelligent Energy Co Ltd License info
License Not Verified
| License # | 1108845 |
| Status | Active |
| City | Butte County |
| Type | Contractor |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of August, 2025. Check the current license status of Oxford Intelligent Energy Co Ltd with the Butte County, CA
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 1108845 |
| Status | Active |
| State | California |
| Type | Electrical |
| Business Type | Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Oxford Intelligent Energy Co Ltd at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
109
BuildZoom Score
Bonded
| Bonded Agent | This License Filed A Contractor's Bond With |
| Bond Value | $25,000 |
Insured
| Workers Comp Provider | Accredited Surety & Casualty Company Inc |
40
Permits
- Building permit records show that Oxford Intelligent Energy Co Ltd has worked on 40 permitted projects.
Oxford Intelligent Energy Co Ltd Employees
DS
Dahai Shi
Ceo / President
DS
Dahai Shi
Ceo / President
JR
Jorge Gabriel Ramos
Rmo