Stop Paying PG&E's Rate Hikes.
Go Solar + Storage.
R.O.I. Solar is a family-owned EPC with 3,500+ installs. Serving homeowners across the Central Valley, Sacramento region, and Bay Area — within 100 miles of Lodi. Every system is designed, permitted, and built by our own licensed crew — no subcontractors, no shortcuts.
⚡ Industry Alert: Freedom Solar has filed for bankruptcy. Bright Energy has closed. If your solar company shut down, ROI Solar can inspect, service, and honor the work. Call (209) 600-4433
Why ROI Solar
The Central Valley Deserves a Solar Company It Can Actually Trust
PG&E Rates Are Up 127% Since 2020
California utility rates have more than doubled in five years. With NEM 3.0's battery-first economics, a properly designed solar + storage system locks in your energy cost for 25+ years.
Family-Owned. Founder-Led.
We're not a national franchise or a lead-gen company. We're a local family business that has been building relationships — and solar systems — in the Central Valley since 2008.
100% In-House Crews
Every installation is done by our own licensed electricians and solar technicians. No subcontractors. No day-labor. The same crew that pulls your permit installs your panels.
We'll Be Here in 10 Years
Most solar companies that sold systems in 2018 are gone. We're still here, still honoring our warranties, and still answering the phone. That's the ROI Solar difference.
The Process
From First Call to First Kilowatt — Here's Exactly What Happens
We've installed over 3,500 systems. We've refined our process to be transparent, fast, and completely hassle-free. Most homeowners are generating power within 4–6 weeks of their first call.
Typical Timeline
Free Consultation & Site Assessment
We review your utility bills, roof orientation, and energy goals. No pressure, no obligation. Just a real conversation about what makes sense for your home.
Custom System Design
Our engineers design a system optimized for NEM 3.0 — maximizing self-consumption and battery storage, not just panel count. Every design is specific to your home.
Permit, Install & Inspection
Our in-house licensed crew handles everything: permits, installation, utility interconnection, and final inspection. Typical install takes 1–2 days.
Flip the Switch
Once your utility approves interconnection, you're live. We walk you through your monitoring app and make sure you understand your system before we leave.
California Solar in 2024
NEM 3.0 Changed the Rules. Battery Storage Is Now Essential.
California's Net Energy Metering 3.0 (Net Billing Tariff) dramatically reduced the credit you receive for exporting solar power to the grid — from ~$0.30/kWh down to ~$0.05/kWh during peak hours.
The solution? Use your solar energy yourself. A battery storage system like the Tesla Powerwall charges during the day and powers your home at night — when PG&E rates are highest. This is called self-consumption, and it's how you maximize your ROI under NEM 3.0.
The Bottom Line
A properly designed solar + battery system under NEM 3.0 can still deliver a 7–10 year payback and $40,000–$80,000 in lifetime savings for a typical Central Valley home.
See Your Real Numbers
Enter your average monthly PG&E bill and see exactly what solar would do for your home — based on real Central Valley sun data and current NEM 3.0 rates.
Central Valley Sun Hours
5.5 hrs/day avg
PG&E Rate Tier 2
$0.46/kWh
NEM 3.0 Self-Consumption
Up to 85% w/ Battery
NEM 3.0 Export Rate
~$0.05/kWh
Calculator uses NEM 3.0 / Net Billing Tariff economics effective April 2023 for PG&E customers. Battery storage significantly improves economics under NEM 3.0.
Actual terms vary based on system size, financing, and utility rate. Contact us for a personalized quote.
Our Work
3,500+ Installations Across the Central Valley
Every system is designed, permitted, and installed by our own in-house team.
Tesla Powerwall + Solar — Lodi, CA
In-house crew · CSLB# 1082435
Your Car Can Power Your Home
ROI Solar is a certified Sigenergy Diamond installer, bringing bidirectional V2X technology to Central Valley homeowners. With the SigenStor EV DC charging module, your electric vehicle becomes more than transportation — it becomes a 25kW backup power source for your home.
- Charge your EV directly from your solar panels
- Power your home from your EV battery during outages
- Export energy back to the grid during peak pricing (V2G)
- Integrates seamlessly with your existing SigenStor battery system
V2X functionality requires a compatible EV. Ask your ROI Solar consultant for details.
ROI Solar is one of the first Central Valley installers certified at the Diamond level for Sigenergy's complete energy ecosystem.
R.O.I. Solar Inc.
Founded by Sean Matthews · Lodi, California
Business
Rating
About ROI Solar
Sean Matthews didn't get into solar to sell panels.
He got in because he understood electricity — the way an electrical engineer does. While others were chasing the trend, Sean was running the math.
Sixteen years ago, he started ROI Solar in Lodi with one conviction: solar should pay you back. Not someday. Not eventually. In real numbers, on a real timeline, with no smoke and no hype.
That standard built a team of 20 and a reputation that still travels by word of mouth — because in the Central Valley, people talk.
The logo isn't just a brand mark. It's a tribute to his sister, and to the idea that some things matter more than marketing.
ROI Solar isn't about the pitch. It's about the proof.
- CSLB# 1082435 — C10 Electrical & C46 Solar Contractor
- Tesla Powerwall Certified Installer
- Enphase Platinum Installer
- Sigenergy Diamond Installer
- 20+ trained installation professionals
- 100% in-house crews — never subcontracted
The Team
A Team That Treats Your Home Like Their Own
Today ROI Solar operates with a team of 20+ trained installation professionals serving homeowners and businesses across the Central Valley. Every system is designed in-house, installed in-house, and backed by people whose names you can actually call.
We've watched dozens of out-of-state solar companies come through this valley, make promises, and disappear. We're still here. We still answer our own phones. And we're still honoring warranties on systems we installed 16 years ago.
That's rare in this industry. That's the point.
The Story Behind the Logo
A Reminder of Why This Work Matters Beyond the Kilowatt Hours
"Some things matter more than marketing."
— Sean Matthews, Founder
The ROI Solar logo — a sun with a cord plugging into it — was originally designed by Sean's sister. He kept it. Not because it was the most polished option. Because it meant something. Every system we build carries that same idea: do work that means something, and the results take care of themselves.
Free Estimate
Get Your Free Solar Savings Estimate
Takes 2 minutes. No obligation. We call you within 1 business day.
By submitting, you consent to be contacted by R.O.I. Solar Inc. by phone, email, or text. Privacy Policy · Terms of Service
Free Estimate
Get Your Free Solar Savings Estimate
Takes 2 minutes. No obligation. A real person reviews every submission and calls you within 1 business day.
- CSLB Licensed #1082435 — C10 / C46
- 16 Years in Business Since 2008
- 3,500+ Installs Completed
- 5.0 ★ Google Rating
- 100% In-House Crews — Never Subcontracted
By submitting this form, you consent to be contacted by R.O.I. Solar Inc. by phone, email, or text message. Message and data rates may apply. You may opt out at any time. Privacy Policy · Terms of Service
Schedule Online
Book Your Free Solar Consultation
Pick a time that works for you — no pressure, no obligation. A licensed R.O.I. Solar engineer will walk you through your custom system design.
CSLB Licensed #1082435 · C10/C46 · Licensed & Insured · Serving the Central Valley, Sacramento & Bay Area
Customer Reviews
What Central Valley Homeowners Are Saying
"ROI Solar was incredible from start to finish. They showed up when they said they would, the crew was professional and clean, and my bill went from $380/month to basically nothing. Best investment I've made in this house."
"We got quotes from three companies. ROI Solar was the only one that actually looked at our bills and designed a system around our usage. The others just gave us a generic 20-panel quote. Sean's team knows what they're doing."
"I was skeptical about solar after hearing horror stories from neighbors who used out-of-state companies. ROI Solar is local, they're licensed, and they actually answer the phone. My Powerwall kept my house running during the last outage."
"The installation was done in one day. ONE DAY. The crew was respectful of our property, cleaned up everything, and walked us through the monitoring app before they left. 5 stars isn't enough."
"16 years in business and it shows. These guys know the Central Valley grid, they know PG&E's rules, and they designed my system to maximize savings under NEM 3.0. My neighbor's system from a national company is already underperforming."
"ROI Solar handled everything — permits, PG&E interconnection, inspection. I didn't have to make a single call. Six months later, I'm producing more than they projected. Couldn't be happier."
Reviews sourced from Google. Verified homeowners only.
Serving homeowners across the Central Valley, Sacramento region, and Bay Area — within 100 miles of Lodi.
FAQ
Common Questions About Going Solar in California
We've answered thousands of questions over 16 years. Here are the ones we hear most from Central Valley homeowners.
Yes — but the system design matters more than ever. Under NEM 3.0 (Net Billing Tariff), the credit for exporting power to the grid dropped significantly. The key is maximizing self-consumption: using your solar energy directly and storing the rest in a battery. A properly designed system with battery storage can still deliver a 7–10 year payback and $40,000–$80,000 in lifetime savings for a typical Central Valley home.
Now Hiring · Central Valley
Joining the ROI Family
In-house crews. Real careers. Built in Lodi since 2008.
We've never subcontracted a job — every install is done by our own people, and that's the whole point. 3,500+ systems, 16 years, and a crew that mostly came here by word of mouth. If you take pride in doing it right the first time, there's a seat for you.
- Paid training — no solar experience required
- Steady, year-round work in the Central Valley
- Company vehicles and tools on install crews
- In-house crews only — we never subcontract you out
- Room to move up: helper to crew lead to foreman
Open Roles
- Solar Installers
- Licensed Electricians
- Crew Leads
- Warehouse & Logistics
- Solar Sales
- Office & Admin
Don't see your role? Apply anyway — we hire good people first and place them second.
Apply to Join the Crew
Takes about 3 minutes. A real person on our team reads every application and reaches out within 2 business days to set up an interview. Prefer to send a resume by email? Send it to info@roisolarpower.com.
By submitting this application you consent to R.O.I. Solar Inc. storing your information and contacting you by phone, email, or text about employment. You may request deletion at any time by emailing info@roisolarpower.com. Privacy Policy · Terms of Service
Next Step · Your Interview
Tell Us When You're Free — We'll Lock In the Time
The application asks for your best days and times (all times Pacific). We call qualified applicants within 2 business days to confirm your interview — in person at our Lodi shop or by phone, your call.
Call to Schedule NowR.O.I. Solar Inc. is an equal opportunity employer. CSLB Licensed #1082435 · C10/C46 · Lodi, CA
Ready to Stop Renting Your Power?
Your Free Consultation Takes 30 Minutes.
The Savings Last 25 Years.
No sales pressure. No obligation. Just a real conversation about your energy usage and a custom system design from our in-house engineers.