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    Sustainable Energy Group

    4.2 (34 reviews)
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    Services - Sustainable Energy Group

    Add to existing system

    Add solar panels

    Add solar panels on roof

    6 More Services

    Add solar shingles on roof

    Solar system installation

    Solar rooftop panel installation

    Solar shingle installation

    Solar system maintenance

    Solar system repair

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    6 years ago

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    Harry P.

    I am so glad we were able to help and thank you for the kind review!

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    4 months ago

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    2 months ago

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    5 months ago

    i can't say my opinion my husband has asked me to remove the review until this company makes it right.

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    27 days ago

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    3 years ago

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    Harry P.

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    6 years ago

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    Harry P.

    Thank you!

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    3 years ago

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    3 years ago

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    Harry P.

    Thank you for your kind words!

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    4 years ago

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    Harry P.

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    9 years ago

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    6 years ago

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    5 years ago

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    Harry P.

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    9 years ago

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    6 years ago

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    Ray D.

    Thank you so much Jon! We are here if you need us!

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    8 years ago

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    Harry P.

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    5 years ago

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    Harry P.

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    6 years ago

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    Harry P.

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    11 years ago

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    9 years ago

    Again and again Sustainable has exceeded our expectations. Thank you Ray and your team

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    13 years ago

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    10 years ago

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    8 years ago

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    Ask the Community - Sustainable Energy Group

    Review Highlights - Sustainable Energy Group

    I contacted Ray Darby at Sustainable Energy Group after talking with a friend about her completed solar project.

    Mentioned in 17 reviews

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    California Solar Electric - January 2015

    California Solar Electric

    (16 reviews)

    I highly recommend you get competitive quotes, at least on solar batteries and watch for change…read moreorders if you do business with these folks. This is what happened: 1. I had an original contract. 2. The first contract had to be dropped due to items outside of Cal-Solar's control. (Fair enough). 3. Cal-Solar provided an update battery contract to an installation (solar installation) they sourced, they designed, they permitted, they installed, and they completed. 4. Cal-Solar wanted a change order on a system that had no changes and yet Cal-Solar claims the installed system had unknown items. (Keep in mind they did all the work...ALL of it.) 5. Cal-Solar waited till the last moment to notify of the changes which pushed against a tax-credit deadline. (From my chair seemed to be the goal.) 6. Cal-Solar provide large price increases to perform the work or quit...from 3.5k (to lose half the battery charging ability) or charge another 9k to add another battery. (Tesla charge half for a second battery, btw.) I'm not saying this will happen to you. I'm just saying what happened to me. As to the contract you sign: From my chair the company uses it for your compliance not theirs. (If you want to force compliance, then what do you do: take time, sue them, force an organization to do electrical work on your home to hit a contract??) Go

    We have been extremely happy with our entire experience while doing business with California Solar…read more Everything was explained up front and we didn't feel dumb for asking questions throughout the process, and even a year later when I called about something as simple as how to clean the solar panels. Everyone has always been professional and straightforward. What a difference it has made to our electric bill. Highly recommend!

    Volt Modern Roofing and Solar

    Volt Modern Roofing and Solar

    (107 reviews)

    Thanks Volt! I highly recommend this roofing and solar company. Buck and his team are great: very…read moreknowledgable, hard-working, and have amazing attention to detail. On top of that, they're just good down-to-earth people. We hired them last spring to re-roof our home, replace some rotted eaves and fascia and replace our old solar system (it was inefficient and malfunctioned quite a bit). We are very happy with what we got for the price we paid, it was a good value. It looks so much better than it did before and is consistently producing more energy. I feel like they helped us make the right decisions through the whole process, especially for system size to be able to keep our NEM1 status. The new roof looks great and works really well. I waited almost a year to write this review to make sure there wasn't any water intrusion during the winter storms - not a drop anywhere. They were in the mid-high range in pricing on the bids we got, but I'm happy we spent a little more went with them. Can a roof be sexy? Ours sure is. All in all, if you need a new roof or solar system or home battery, or all of the above, call Volt. They are a competent and professional group of local people who are really f**king good at what they do.

    After much research, we had the top six companies quote us estimates for solar on our Loomis house…read more I noticed that each company explained the process differently; some explanations were good, while others left me more confused. When Buck arrived, he stayed until we were satisfied with our understanding, and I learned so much more from his explanations than from all other companies. Considering they were also roofers and understood the difficulty with our high-pitched roof, we placed more confidence in them than the others. Hence, we chose them after a month of research and estimates. Kristen, their assistant manager, was very communicative throughout the entire project, keeping us informed about what was happening behind the scenes with permits, PG&E approvals, and the team's schedule. That helped us understand the project's time frames. Bucks crew -- Jared, Sean, and the others -- were friendly and professional. They worked quickly and efficiently to finish the job, paying close attention to detail. They went above and beyond, including sharing additional insights about our gutters and attic. I could tell they understood the bigger picture, and I am grateful for their effort. After researching many companies, we are happy we chose Volt Modern and will definitely recommend them to others looking for solar installation and roofing services.

    Fronius Inverter Repair - Easy to service!

    Fronius Inverter Repair

    (9 reviews)

    I cannot say enough about Jim. I first contacted him through Yelp. Out of about a half dozen…read moresolar companies, he was the only one willing to help with my failed inverter. He was out of the state at the time but promised me he would get in touch when he returned -- and he did. He got the inverter installed promptly, but it failed shortly after. He had to make several trips back to my house (25 miles each way) to diagnose and fix the problem. All the while he communicated with me regularly by text messaging and kept me abreast of his progress. Today the inverter is up and running and I am pumping out watts. The experience with the inverter failing could have been a frustrating one, but Jim turned it into a steady process with a successful outcome. I recommend Jim in the highest possible terms. He is a professional in every sense of the word.

    Jim resuscitated our solar system and we are back up and running!!!…read more Our legacy solar went down a few years ago and we called out our solar equipment provider. They sent out their tech who told us our inverter was dead and they told us it was unrepairable and cost prohibitive to fix. Also newer inverters would not be substitutable due to a difference in the solar panel architecture. After evaluating the ROI, we decided that it was almost a net 0 so we chose to fore-gore upgrade and or repair. Fast forward to 2022, I came across Jim's Fronius inverter Repair Website and after a few emails and a phone call Jim came out and diagnosed that the only thing halting our solar was a $9 fuse that had blown. 15 mins and we are back up and running.

    CA Solar Guru - Mountain goat team on a 50 pitch roof!

    CA Solar Guru

    (1 review)

    Straight forward, to the point, and at a fair price! When everyone else said it would be 2-4 weeks…read moreto replace my inverter, they RMA'd my unit in just a few days.

    From the owner: SERVICES - Roof & Ground Mount Specialists…read more- Batteries (New & Add-ons) - Existing System Services - 3rd Party Audit / Diagnosis - 3rd Party Solar Buyouts / Legal Assistance - PV Creative Problem Solving “The Sun Belongs To Us.” - Nick PPAs If you’re looking for solar on a payment plan, I will find a quality install company, make sure the price is fair, oversee the plans and permitting, and a manager will be there the install day to ensure everything goes according to plan. Own Your System Cash is the best investment you can make in getting solar on your house. The way solar companies make money, is if you do a PPA where you pay the solar co. instead of PGE, the solar co. owns your system and they get the 30% fed tax rebate. Home-Owner Builder Permits Nick is a solar specialist who can do consulting for homeowners interested in getting a homeowner-builder permit, acquiring professional plan sets, walking you through the purchasing of materials, and if needed assisting you in the install of solar panels. This will get you, the homeowner, the same solar system at about half the cost. Battery (Add-Ons / New) Our team is battery experts who can really help you understand how they work, the benefits, incentives, and the real way to use batteries to save lots of money. Ground Mounts Nick has done hundreds of ground mounts, using concrete, Earth screws, and also frame w/ anchors. If you’re interested in a ground mounts, Nick is the guy to manage the project.

    Sustainable Energy Group - solarinstallation - Updated May 2026

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