Great service, friendly staff, on time deliveries, and always willing to match competitors pricing. Plus not having to drive to Greentech in Chatsworth or Ventura when I need a part same day for a service call is a huge plus. read more

See all

I bought from them when they were Tandem Solar, worked with maybe everyone one at the firm (Sean, Greg, Sarah). I researched every DIY seller on the net, Tandem was by far the most price competitive and comprehensive. I researched the heck out of every aspect of the project, asked a ton of questions, they were very patient and answered all my questions. Bought a 10kw system from Tandem, everything was delivered into my driveway, easy peasy. Tandem arranged for an engineer to provide the calcs and site plan for my permit. I had to buy some cabling separately, and some conduit for the home run to the panel, otherwise everything came from them. I bought the most efficient panels per square inch that they could find due to a space constraint, so the panels were the most expensive they sold, but those same panels were quoted elsewhere at a much higher price. Couldn't be happier. I see they are a new company now, so not sure about their set up. But their pricing still seems competitive. I am considering adding four more panels, not sure if shipping is cost competitive to the Bay, but I am definitely going to give them a chance to quote, they are my first choice for sure. read more

Found this company on the web by chance. Ended up purchasing our entire system from them. Our sales agents Kourtnee and Sean are amazing. Everything was correct. Delivery was fast, amazing pricing read more

Best prices even compared to the Internet stores (ordered PV modules racking stuff). Fast delivery - I've got the parts on the second day after ordering. I highly recommend them. read more

I used Tandems service a couple years ago to replace some aging BP solar panels that were outdated with some more powerful panels. . I also got some new racking and the wiring to accomplish the rooftop installation. I found the folks at Tandem to be very knowledgeable and helpful. They were quick to provide me a quote for all necessary parts. When I ordered, the products arrived quickly and professionally by the solar products delivery vehicle. Everything was correct and complete. In my opinion Tandem is as close as you can get to a reputable, risk free, close to wholesale, source that will stand behind their product. read more

I ordered a single 400w panel for my project. Since I'm in Southern California, shipping was included, and it arrived quickly with a friendly and helpful delivery driver. I'm new to solar projects, and I did a ton of research to find a local vendor. Very happy with Tandem Solar and will definitely source with them again. Thanks "Brother Moose"! Edit: A tip I got from them when ordering online: go into the checkout process to see what actual shipping costs will be. read more

Update Jul 2020: Now I'm extra glad I didn't go with Tandem because Tesla just lowered prices to $1.49/watt. If I had gone with Tandem I would have barely saved any money vs Tesla. Fortunately I found vendors with much better prices from DIY forums, but even then I didn't save that much vs Tesla. At Tandem's prices there's no way DIY makes sense. I love that it's Greg responding to my review because he was the last person I chatted with on the phone at Tandem: Me: "Hey Greg! I'm just calling to follow up on my 3 unanswered emails about those accessories you quoted - any updates?" Greg: "We sent it to our wire guy and we'll get back to you soon!" [I never hear back] So... instead of taking my money (or even just saying no), Greg decides to intentionally mislead me and delay my install while I'm waiting on him. And now Tandem is virtue signaling about COVID in a Yelp response? Wow. Well at least I finally heard back from Greg :). Original Review: If you're looking for a deal on solar, don't bother with Tandem! Not competitive on price, and terrible communication. Tandem solar was friendly until I found a better price with another vendor. Then they were completely unresponsive and refused to honor their quote. I was planning to purchase a 8kw system from Tandem but found a significantly better price at another vendor. There were however a few accessory items that I could only find at Tandem. I worked with Sean Overbeck who was friendly at first, but once it was clear he couldn't get close to the price of the other vendor he stopped responding to calls & emails. Not even enough courtesy to say no! In the end I found a local supplier that was cheaper anyway so I guess it's a blessing in disguise. read more

Extremely satisfied top to bottom with Tandem Solar. Every step of the way the staff at Tandem took care of our needs. Sean and Gregg are true experts in the Solar industry. Highly recommend and would use time and again. read more

See all

I purchased several thousand dollars of enphase micro-inverters and racking. Items were shipped via fedex freight. Unfortunately Fedex lost the rails during shipping, but Fedex paid out the claim. I would do business with Tandem again. But, I would source source the bigger items closer to home. read more

I used Tandem for my solar drawing permit package and equipment purchase for a DIY solar residential project. Now that I'm finally done, I can reflect back on the experience and I'm so pleased I used them. Their selection of products and prices were outstanding for my moderate-high end equipment wish list. I found Sean and the other staff exceptionally helpful, friendly, straightforward, and responsive. Their design services were great, although delayed due to volume. Very much appreciate the quality of service and help. A top quality company and it worked out perfect for me and my DIY project. read more

Brought 18 panels from them but shipped wrong model. They agreed to refund but never happened. Tried to contact them couple times but unresponsive. Not recommend for next purchase. Good luck if you plan to buy from them. Updated: Finally got the refund. Thanks for Sean's help to push refund. read more

I would absolutely NOT recommend Tandem Solar for my next purchase. I selected them for my first time as their prices were better than most. Their staff were friendly. But is is important to receive and item in good condition. Their shipping was an abomination and they should be embarrassed. For context I'm in the process of expanding my current 10kw system. I had a small roof area which only required 6 panels. I ordered the railing, mounting, and hardware along with 6 Enphase Micro inverters from Tandem. Tandem shipping simply threw all hardware and inverts in one box with no packing material. Mounts, L brackets, bolts, and inverters all bouncing around together with no protection at all. I will be amazed if these beat up scratched micro-inverts last there expected life time. This was my first and last purchase from Tandem and shipping was $261. My previous purchases were from Alt-e and Revue. Both of those suppliers packaged my orders appropriately and items arrive in shiny new condition. read more

Sun Supply PV - Solar Installation Near Me - Newbury Park, California

You can do your own solar install! Sean is amazing, has great customer service and the support and pricing were unbeatable. They will even help you get your permit. I would highly recommend Tandem for all solar needs! read more

My goal for 2018 was to install solar. I didnt intend to do it so rushed in January, but thanks to the Trump tariff (sigh..), I had to accelerate the plans. I am a do-it-yourself kind of guy and naturally none of the turn key installers would answer my questions. However, as mentioned in the other reviews here, Greg and Sean were SUPER helpful, Greg spent 1+ hour combined on the phone with me, answering questions, making recommendations, etc etc. Then comes price. Yeah..BEST PRICE on the entire web and they are right in my back yard. Could not get better than that. They are a small business just like myself, and I am happy to support them and send them all the business from friends and family. These folks know what they are talking about, do NOT push into buying things you dont need, AND have excellent pricing. These guys are rockstars of DIY Solar, I am super happy to have come across them. read more

These guys were great. Very friendly, responsive and ultimately delivered on what they promised. Nobody could beat their quoted price, but almost as important, they took the time to understand my project and needs and helped me build a kit that was exactly what I needed. I can't say any more emphatically just how great of an experience it was. read more

AWESOME! I bought 1.5 years ago. Greg was awesome and helped fillin the blank with all the little parts I needed to roof mount. Price was best around. And here is the best part: They sent IQ6 instead of IQ6+. All it took was one phone call to them and they shipped the right ones out that day! I sent the wrong ones back 5 days later. No RMA B.S, or "send them back and we will send right ones after we get them". I needed them They really took care of the mistake and it was like it never happened. If I add more solar, will DEFINITELY buy from them. read more

Unresponsive. Have sent the wrong product twice. Promised to send the right product two weeks ago, never sent it and are now MIA. Go elsewhere and avoid the headache. I had to use zip ties because I ordered two bags of 100 count clips and they sent me just 2 clips while I was on a deadline... I also ordered male Enphase caps and they sent me female caps. They promised to make it right by overnighting the right caps then disappeared. It's been two weeks. They need to charge more and pay someone for QC. read more

Just received my second order, also purchased from them in 2015. Very happy with the quality of the products that they offer and the competitive pricing. The staff is incredibly knowledgable. I worked with Sarah on my last order and she was fantastic, very responsive to e-mails. One of the competitive advantages of buying from Tandem is that they make sure that you get everything you need for your project. Sarah made sure that I had all of the correct roof rack mounting components for my specific order. As an example she provided a detailed inventory of all of the items I needed, this saved me the trouble of looking it up on my own and it also saved me $$ because I didn't have to worry about order unnecessary parts. I'm sure I will order more Solar equipment and the future and I will definitely place my order again with Tandem. read more

I promised I would write a review good or bad and finally getting around to doing it. I did a fair amount of internet shopping for parts and Tandem was the most aggressive I found. So I sent them my city approved plans and they went through the drawings and came up with a punch list for me. That was easy! They then shipped everything out and while I did have a small problem with the shipping company (fedex or ups?) Tandem quickly took care of everything. During installation, we had a couple of newbie questions and Tandem was very patient answering our questions. Lastly I did loose a couple of parts that fell off the roof and they quickly took care of my needed parts, shipped them out the same day. Great pricing, great service...works for me!! read more

Sean from Tandem Solar Systems is a pro at what he does in every sense of the word. he was excellent at evaluating of our solar needs and recommending the companies and products we should use. As we are doing the installation on our own he was a great help. He was always available to answer questions. I received my order as promised quickly and professionally delivered and the prices are the best for sure as I did some serious research. I would recommend Tandem Solar again in a heartbeat! read more

Tandom Solar is the best solar company out there. Sean was incredible to work with. He was very responsive and knowledgeable. I spent months researching this and I can tell you I could not find anyone else that was even close to their price. They were 8% lower than their next competitor. I used the Iron Ridge system with the micro inverters. Everything is extremely well designed and truly was plug and play. I was able to do all the work myself with the exception of placing the panels. I hired a couple of high school kids and it took us 1.5 hours to install 33 panels. If you are going to install solar use Tandom Solar. read more

I called Tandem Solar about 14 305W Canadian solar panels and they sent me an estimate for $2660. For my surprise when I call them to order the panels they told me they have only 310W model which cost me $2930 . I checked their website and they are still selling the 305W model. They also added $85 Credit card fee which was not included in the estimate and the payment was by a debit card. , I called them they said they will refund me and they never did. Also I ordered panels with silver frame and they sent me black frame. read more

Purchased 10 Enphase IQ7 Plus micro inverters and order was canceled because inverters are in short supply and they required the purchase of complete system in order to buy IQ7 plus's. So I looked on ebay and there were some listed for individual sale but when I contacted the seller on ebay it was just Tandem solar price gauging and selling them for more on ebay. Very dishonest, fraudulant, and misleading company. read more

Let's just say outstanding all around. Customer service was 5 star, knowledgeable and went beyond my expectations. Highly recommended.

Tandem is a great place to purchase your solar system. There is no pressure to buy and they do not push you to buy something you do not want. Michael and Gregory were great at putting a system together and Sal did an excellent job shipping it, I had a half sandwich bag of misc parts when I was finished. Cost 1/3 of what an installer wanted, easy install, and looks great. Best of all we're making electricity. Enjoyed the project read more

I had been browsing for a good solar supply company for some time, and luckily I stumbled across Tandem Solar! Sean was happy to help me all the way from the PV system quote to completing the permit process. He was very polite and took the time to answer all of my questions without the normal smug attitude that is all too common in this field. To top it all off, they sold me the highest quality products at an uneatable price. Way to go guys! read more

Sun Supply PV - Solar Installation Near Me - Newbury Park, California

See all

Great prices, good communication, and fast delivery. Order was perfect with nothing missing. A slight miscommunication on the tracking number that was quickly resolved. I was a little nervous about the bank transfer but everything went just fine. If they have it, this is the place to get it! read more

3 reasons that I choose to purchase my PV system through Tamdem: 1. Absolute the lowest prices on every component. 2. Friendly, knowledgable, and easy to reach. 3. Prompt, free (local) shipping. Many thanks to Greg and Sean for the awesome service! read more

Amazing experience all around. Sean answered all of my questions, and went above and beyond, helping me put together the full parts list for the system i wanted. I was on a tight timeline and Tandem Solar worked with me every step of the way, communicating throughout the process. I shopped around, and between the responsiveness, the great prices, and all around great Customer Service, I can't recommend Tandem Solar enough. read more

I've very pleased to have found Tandem Solar as I was shopping for equipment for my rooftop system. They offer very high quality equipment at prices competitive with any other distributor, especially with their local delivery service. Quoting was painless, payment was easy. They were fast, with just 1 week turnaround from order to delivery, and they were responsive to tweaks to the BOM I needed to make after the initial quote was provided. I am confident that if I had needed more help figuring out the system, they have the knowledge and experience to provide it. The order came complete, well packaged, and the only surprises throughout the process were good ones. They will be easy to recommend to friends and neighbors who are considering similar projects. Thank you Sean! read more

Last year, after getting quotes from local solar installers, I decided that I would do my own installation to reduce cost and thus have faster return on investment. I did my research and scoured the web for equipment suppliers. Tandem was, by far, the best deal I could find. I put in a request for a quote for a complete system (racking, modules, SolarEdge inverter) and quickly recieved a PDF with the details, including a very reasonable shipping quote from SoCal to UT. During my permitting process, I made several tweaks to the system. Sean updated the quote several times and offered technical suggestions. When I finally pulled the trigger, the shipment was quick. I received tracking numbers, and in about a week I had two pallets of equipment in my garage for install. I couldn't be happier with the equipment and service! All modules and equipment are installed and now cranking out kilowatts. read more

Bought some micro-inverters online and wait for 3 weeks for shipping process. It didn't try to ship until request the shipping status. I do not want to have the business again. I don't feel happy when get online chat. The shipping process is taking too long and don't have feeling like customer services. read more