Business ProfileVerifiedSolar Companies in Modesto, California
Solar Installation Group, Inc.
Solar Installation Group, Inc. is based in Oakdale and serves Northern California. Started in 2013, it installs residential, commercial and agricultural solar systems. Its in-house service team also handles solar-system support.
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Business Highlights
- Family-owned and operated.
- Contractor license 997639.
- Fully licensed and bonded contractor.
- Solar installations are handled in-house, without subcontractors.
- A 25-year workmanship warranty applies to the original customer and is not transferable if the home is sold.
- Certified installer of the listed home battery and storage options.
Service Area
Stanislaus, Tuolumne, Calaveras, San Joaquin and Mariposa counties.
Public local listing. Solar Installation Group, Inc. is one of 12 solar companies ProsGrade lists in Modesto, California.
Listing details
5 services listed, including Residential solar, Commercial solar and Agricultural solar. Open weekdays, closed on weekends. 258 reviews.
- Verified listing details
- Service information
- Customer review signals
- Photo gallery
- Public contact information
- Published local profile
How This Business Compares
How Solar Installation Group, Inc. compares with the other 11 solar companies on ProsGrade in Modesto, using public Google ratings and review counts.
- Has more Google reviews (258) than 9 of the 11 other Modesto solar companies on ProsGrade.
Services Covered
5 services- Residential solarRoof, sun exposure and shading assessment; custom system design.
- Commercial solarCustom systems based on energy-use patterns and property layout.
- Agricultural solarCustom solar designs for agricultural energy needs.
- Battery storageFranklin a/Power 2, EcoFlow, Tesla Powerwall 3 and Enphase IQ Battery 10C.
- Solar system serviceIn-house team; support for systems SIG did not install.
Reviews
What customers say
Customers praise clear explanations and responsive communication, along with clean, professional installation work. One customer says a 23-panel system with a battery, inverter and smart electrical panel was installed in a day; another says SIG checked the system periodically after installation.
Customer Reviews
David Mullins
We had been putting off any solar options for our house for quite sometime. Our PG&E bills had been crushing our finances for many years. So after being sick and tired of being sick and tired we finally contacted SIG…
SIG was immediately friendly and helped explaining the process. We were quickly funded and our install was scheduled. The installation was seemingly painless and the switch was flipped. Within a short time our PG&E nightmares faded. Everyday we leave for work the big beautiful sun fills our Tesla PowerWalls with juice.
After the install the huge energy bills stopped. SIG also continued to check our system periodically to make sure everything is running properly. As the homeowner we are also able to check the system through the Tesla App SIG helped us set up on our phones.
I typically don’t write reviews, but this one I had to. THANK YOU, SIG for your efforts in providing a quality service to our family.
David Mullins
Oakdale Ca.
Joe Brinegar
All the way from the beginning of the process with Josh Clark as our sales guy to the finished installation, Everyone on the crew were really great people. Very friendly site check crew and install crew. Super efficient workers and had my system running in one day. I am in the construction industry and their work is very clean and professional. I’ve already recommended SIG to 3 people. Josh Clark is very good with his communication and I always felt ”in the loop” during the process!
Bret Martin
Rylan did a wonderful job of helping us figure out what our needs were. He also was a great help for us in deciding what was the best and most cost effective option was for our solar installation. Aron, Paul and their construction crews completed the ground mount structure, solar panels and Tesla Powerwall 3 installations in a very professional and clean manner. The office staff kept me informed in a timely manner of when the crews would be working on our project. Rylan was also always able to answer my questions during and after the completion of the project. The SIG company this wonderful installation at the end of the 2025 year when everyone wanted solar systems installed because of tax credit going away. I'm so happy we decided to have them install our solar system.
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Frequently Asked Questions
How does SIG Solar determine how many panels a property needs?
It bases panel count on total electrical use, solar exposure and array position, then can provide a customized proposal.
How long does a solar installation take?
The overall process averages 30–90 days, depending on the city or county permit process. Most installations themselves take a day or two, with SIG owners overseeing the work.
Does SIG Solar handle permits and inspections?
Its operations team handles permit paperwork, and SIG coordinates a final inspection with the local building department.
Can SIG Solar service a system it did not install?
The company says it can help with issues on solar systems that are not SIG Solar systems.
What financing options does SIG Solar offer?
It lists solar loans, power purchase agreements and outright purchases. Under a power purchase agreement, the customer pays for power used and has no system ownership or maintenance responsibility; SIG describes this option as having zero upfront cost.