SUNation Energy

SUNation Energy handles solar work out of Greer. They design and install residential and commercial solar panel systems along with battery storage, EV charging, and roofing services. The company also manages financing options and handles permits along with utility coordination. Reviewers note the business covers full projects that combine roof replacement with new solar setups and add-ons like Tesla Powerwall or Enphase systems.

Customers report jobs that include removing old panels and roofs before fitting new ones with 25 or 33 panels in a single day. Teams led by names such as Dave LoMonaco, Harry, Scott, and Victor Higgins arrive on time, work efficiently, and leave sites clean. Reviewers describe quick site visits, clear explanations during installation, and follow-up help with apps or production monitoring. Several mention lower utility bills after completion, with one dropping from hundreds of dollars monthly to under twenty.

The company keeps communication steady from first contact through final steps, with sales reps answering questions promptly and crews explaining progress on site. Pricing comes across as straightforward with no added fees, and financing stays fixed without yearly increases. Reviewers note the crews handle cleanup daily and coordinate with outside parties like utilities when needed. Service extends to existing systems, including battery additions or smart panel upgrades for repeat customers.

Google shows a 4.7 rating from 968 reviews, with repeated mentions of professional crews, reliable results, and solid follow-through on permits and service calls. Recurring notes cover clean work, attentive sales support, and noticeable energy savings once systems run. DIRT Score 4.6 from reviews on Finds.

DIRT Score = confidence-weighted rating across verified review platforms. How is this calculated? →

“I had a fantastic experience with SUNation from beginning to end! The entire process was smooth, transparent, and professional. One of the biggest things that stood out was their upfront pricing and financing. Everything was clearly explained, with no hidden fees or surprises. Unlike some competitors, SUNation offers financing without annual payment increases, which was a huge selling point for me. The installation team was extremely professional, and the solar panels look great! The onboarding process and customer service have also been excellent, with great communication every step of the way. SUNation handled all the permits, paperwork, and coordination with PSEG, making the entire experience completely hassle-free. Overall, I couldn't be happier with my decision to go with SUNation. It's refreshing to work with a company that delivers exactly what they promise. I would absolutely recommend them to anyone considering solar!”

“We enjoyed our experience with SuNation. The initial meeting went smoothly. Our representative was prepared for all of our questions. He came equipped with materials to show us areas of our house where solar panels would be most effective. On Installation day, the team of 6 arrived ready to work. The team worked quickly and efficiently to install the 25 panels needed to get our home up and ready to run with solar energy. We had a lengthy demonstration to make sure all of our questions were answered. We're happy we chose SuNation to complete our installation.”

“Tremendous experience with Sunnation Energy and could not recommend them more highly. From the beginning, their entire team has been professional, responsive, knowledgeable, and genuinely committed to making sure we are taken care of. I especially want to recognize Harry, who has been invaluable in helping us manage and navigate everything related to our solar panels. He has consistently gone above and beyond to answer our questions, address any concerns, and make sure everything is running smoothly. Every member of the Sunnation team we have interacted with has been courteous, helpful, and professional. If you are considering solar or need ongoing support with your system, I highly recommend Sunnation. They are simply the best!!”

“The salesperson was very attentive to my concerns and provided me with all the details needed to set my expectations properly. The person who did the site visit was quick and thorough, and the installation crew was polite, clean, and fast. The job was done in one day and I am already generating plenty of power from the sun. The permit process isn’t complete, so I’m not done with Sunnation yet, I am optimistic based on everything that’s occurred so far that everything will be wrapped up in a few weeks and it will go smoothly. If not, I will report back on my review! Otherwise, I recommend this vendor if you’re thinking about solar”

“Dave LoMonaco is a true professional. He is knowledgeable, personable, and genuinely passionate about solar energy. I first reached out to Dave after seeing so many people recommend him online. At the time, I was already working with another SUNation sales representative, but Dave took the time to review my proposal and quickly identified mistakes. He then put together a much better system design that was able to offset approximately 110% of my projected energy usage. From start to finish, Dave was there every step of the way. Even after the installation, he continued to help, including following up while I was waiting for access to the Enphase app. What impressed me most was his responsiveness. No matter how many questions I had, he always replied quickly with clear, honest, and knowledgeable answers. Installing solar is a significant investment, and I spent a lot of time researching before making my decision. It was incredibly reassuring to work with someone who shared my attention to detail and never made me feel rushed or pressured. Dave's expertise, professionalism, and commitment to his customers made the entire experience smooth and stress-free. Thank you, Dave, for all o”

“SUNation Energy really surpassed my expectations! From beginning to end, Dave and the team at SUNation treated my family with the utmost respect and consideration. Dave took the time to explain so many things to me as I was just fairly uneducated on solar but knew it was the right move. As a new homeowner, I felt totally reassured and even now if I have a question he doesn’t hesitate to lend info right away. That’s just great customer appreciation and the hallmark of a good company. The work was done expertly, from speaking and meeting with their roofing contractor Jack (who is just an absolute professional and I would consider working with him outside of this process), all the way through the panel install and the subsequent meet to help me understand how everything should work. They even worked with me to help have a tree removed that impeded the coverage on my roof, solving issues to get the job done! The process is pretty seamless, done quickly, and as the customer and homeowner you really have nothing to worry about. The products are warrantied well, and SUNation really stands behind their work. I would, and I already am, referring SUNation for anyone who is looking to get int”

“The best and most reliable solar company in Long Island for sure. The best prices and deals they have. I got few estimates from other companies and they were charging me 20K and more for trying to install 9 less panels and not installing a new roof which Sunation did. Alexa Papa sale representative, Scott the roof supervisor and Victor Higgins the solar installer were the most knowledgeable and professional people out there 🙏🏼🙏🏼🙏🏼🙏🏼 The whole staff that worked on the roof and solar panels were very professional and extremely helpful with giving me all the instructions and explanations of the work that was being done. For the record I got 33 panels and a new roof as I am extremely happy with all the work. Thank you all that work for SUNation company and I am only highly recommending this company 🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼.”

“We had a 15-year-old solar system removed from the roof. SUNation removed our old roof and installed a completely new roof. They then installed a new solar system. This certainly is an expensive project, but replacing the roof would be expensive one way or another. The SUNation installers were polite, arrived on time, cleaned up all the inevitable mess that was made, and did what appeared to be an excellent job. Time will certainly tell regarding the roof and the solar system. I can say that the app shows we are already producing more power than we ever did before. So far, so good.”

“I had an outstanding experience with SUNation Energy from start to finish. Our salesman, Dave, was exceptional. He was knowledgeable, professional, and took the time to explain every step of the process without ever making me feel pressured. He answered all of my questions honestly and made sure I was comfortable with my decision. Dave’s attention to detail, responsiveness, and genuine commitment to customer satisfaction made the entire experience smooth and stress-free. It’s clear that he truly cares about his customers and takes pride in his work. If you’re considering solar, I highly recommend SUNation Energy, and I especially recommend asking for Dave. Thank you for making what could have been a complicated process so easy and enjoyable”

“Everyone I worked with on my roof/solar project were great. The roof and solar teams both did a great job - their leads kept me informed throughout the day on their progress. Thankfully there were minimal issues, but they provided explaniations to allow me to make informed decisions. Happy with the work, cost, and partnership to get everything aligned. Now looking forward to the savings!”

“I recently had my roof replaced and had a great experience. Compared to other GAF Master Elite and President's Club Award companies their price was very reasonable and their sales process with follow ups was much better than five or six others I also got quotes from. They get your address and email a quote for your review. This makes the sales and quote process extremely convenient so you don't have to meet them for the quote. The scheduling and roofing crew are also great and professional. They show up on time, work really well, and always communicate about the plan for the day as well as what's left for the subsequent days. At the end, everyone was diligent about cleaning everything up and putting it in the on-site dumpster. Alexa on the sales/marketing team and Scott on the roofing crew made me feel like I hit the jackpot with this entire project. Thanks again for an amazing experience!”

“Seamless from sales to install! 3sonsenergy for sales and John B's install team were great!! On time, clean, friendly, knowledgeable. Took all proper safety precautions and really did a great job. Used quality material to keep critters out. Really great work, great value, great people! I would highly recommend these guys to anyone!!”

“Had my solar installed this weekend 11/29/25. Steve and his team arrived on time and worked so efficiently they were done mid afternoon. Every step was explained to me, a checklist at the end ensured everything was completed. You can barely notice the panels on the back of my home! From the first contact to the final install I was kept informed at every step. I highly recommend SUNation Energy if you are considering solar.”

“SUNation did a great job on my solar and battery installation. Communication was good throughout both the application and installation process, but spotty in between, so be ready to make some follow-up calls and wait during the time when the permits from your municipality and approvals from your utility company are being done. Even so, still very happy with the results, which is all that matters now anyway...”

“Very satisfied with the service and results. My sales rep Cameron was always quick to respond to my questions even after the panels were installed. My monthly utilities bill went from $300 to $20 a month. Great professional company to work with!”

“I had a great experience getting solar with SUNation. I highly recommend our salesperson Dave LoMonaco. I had a lot of questions and he answered everything. What I liked most was that he was never pushy and was always patient with us. He provided us with all of the information we needed to make an informed decision. We met with a few companies but Dave really made the difference, he always answered my texts/calls promptly and SUNations pricing was also good compared to other vendors. Installation went great, there's no pipe on my roof like I have noticed with some other systems in the neighborhood. I love checking my solar production on the Enphase app on my phone. My last PSEG bill was $18. It used to be over $300. The whole process from start to finish was smooth. I highly recommend this company if you want solar for your house.”

“I had an excellent experience going solar with Sun Nation, a big part of that was Dave LoMonaco, who oversaw the entire project from start to finish. From day one, Dave went above and beyond what was needed. He was extremely honest, knowledgeable, incredibly friendly, and never pushy at all—just very easy to work with. I had a long road from start to finish, but he made the entire process extremely, extremely easy and stress-free. The installation crew was just as impressive—professional, efficient, and very clean. They worked quickly while paying attention to detail, and left everything neat when the job was done. Communication throughout the project was excellent, and everything was handled smoothly from planning to final setup. You can tell Dave truly cares about his customers and takes pride in his work. I highly recommend Sun Nation and especially Dave LoMonaco if you’re considering solar—you’ll be in great hands.”

“Repeat customer of SUNation from 2017. They have delivered again on the excellent customer experience. I contracted SUNation to add a battery backup system, “Span” smart electric panel, as well as a few other smart home upgrades. Being that I was an existing customer, I spoke with their service advisors who explained the products to me and how they could integrate with my solar panels. Really pleased with everything and for sure have the smartest house on the block, with the added benefits of a backup system fueled by my existing solar panels.”

“Mike K. and the SUNation crew did an amazing job with my home! I got the full package - new roof, solar, Tesla Powerwall, Span panel, and Span EV charger. They paid attention to detail, did a high quality job, and always cleaned up at the end of the day. I couldn't recommend them enough.”

“Had SUNation install my solar electric system 2 years ago. I am very happy with the results and service they provide. Staff and crew were courteous, knowledgeable and neat. My electric bill is $13.42 per month which is the best. SUNation monitors my system and has called me whenever they see an issue which has only happened once. My daughter has had them install on two of her houses. I would highly recommend SUNation to family and friends. Hope”