Longhorn Solar, Inc.

I bought 12KW solar panels from Longhorn 2.5 years ago, installation was ok. Since that time I have had 2 warranty issues, first was an inverter that went bad, it took almost 6 months of me asking them every week to fix the issue. Second happened almost 13 weeks ago, not sure what is and they won’t respond. I would not use them again

Longhorn Solar installed our panels a few years ago, and while we were still making payments, it was easy to get in touch with someone when we had questions. Unfortunately, that hasn't been the case since the system was paid off. Over the past several weeks, I've sent an email, followed up with another message, and even left a voicemail, but I haven't received a single response. It's disappointing to see such a lack of communication with existing customers. If the company is overwhelmed, it may be worth dedicating someone to manage customer emails and inquiries so customers aren't left waiting indefinitely for a response. I'll gladly update my rating once someone from Longhorn Solar contacts me and addresses my concerns. In the meantime, I would rather everyone know what happens when you pay off your Solar Panels... If this is not suppose to be the experience, then I am dumbfounded by the lack of responses to my inquires recently.

I purchased my solar system from Longhorn Solar in April 2022. Unfortunately, my experience after the installation has been very disappointing. In August 2023, I needed a new roof and paid over $13,000 to have Longhorn Solar remove and reinstall my 37 solar panels. The panels were supposed to be cleaned before being reinstalled, but they were not. They were also reinstalled with the dirty side facing my front porch, which was very noticeable. On top of that, I had to wait approximately four weeks after my roof was completed before the panels were put back on. In May 2025, a connection issue caused my entire system to stop producing power. Because my system uses a single inverter, when one issue occurred, none of the panels worked. It took nearly two months to get the problem resolved, leaving me without solar production during that time. Now, in May 2026, the system has stopped working again. It has been almost three weeks, and I still do not have an appointment scheduled for repairs. It feels like customer service and system maintenance are not a priority once the sale is complete. I purchased 37 panels with the expectation that they would offset approximately 80% of my electric usage. That has never happened. Even when the system is operating, I consistently have electric bills between $180 and $200 per month.

I’d like to share both the good and bad sides of my experience with Longhorn Solar. First, I want to recognize Kathie Millen for doing an excellent job coordinating my roof replacement project. She handled the scheduling for the solar removal and reinstallation, and that entire process went smoothly and professionally. I truly appreciate her effort and communication throughout that portion of the project. Unfortunately, the experience after that has been extremely disappointing. During the installation process, the installers accidentally damaged my motorcycle, causing approximately $1,600 in damage. I was immediately told it would “be taken care of” and that it would not be a problem. However, it has now been over two months, and I have not received a single response from management despite multiple emails being sent to Delisa, Danny, and the main service email address. On top of the repair costs, I had to rent a trailer to transport the motorcycle over 100 miles to San Antonio because very few shops work on that type of bike. I also had Uber expenses to get back and forth. Initially, I wasn’t even planning to ask for reimbursement for those additional costs, but the complete lack of communication and accountability has changed my perspective. What’s most frustrating is the lack of customer care after the damage occurred. Promises were made, but nobody followed through or even responded. At this point, it feels like my only remaining option is to pursue the matter in court, including the additional expenses and lost time. Based on this experience, I would strongly recommend staying away from Longhorn Solar. If damage occurs to your property, don’t expect timely communication or accountability from management. John Christner-Drake

Longhorn Solar installed our panels a decade ago. They've since been through rain, hail, snow, and they continue to run well! Longhorn Solar service has been great, and I don't just mean the initial install. They've been responsive and helpful for all questions and minor issues that have come up over the years.

Excellent Customer Service

Needed to replace a bad converter. Had difficulty getting the part from SolarEdge due to it being on backorder. Jared from Longhorn kept in contact with them and after a few weeks went by, instead of waiting any longer replaced it with a unit they had on hand. Installer showed up when promised, he was quick and professional. It was an all-around great experience. Thank you!

Great Solar Company

We were looking for a reputable company to install 15KW solar system along with 2 Powerwall 3's, and decided to go with Longhorn Solar after weeks of comparing options. Right off the bat, Jameson went above and beyond to explain the process, the design, and financing while being fully transparent unlike some other installers that we spoke with. Jameson was extremely professional and easy to work with and gave us full confidence that we were making the right choice. Once we made the deal, Fhilecya kept us fully informed on the permitting process and efficiently got everything ready to start the install within a month. The install crew was professional and respectful. However, there were some design changes they made I wasn't informed of due to roof air vent location, but Fhilecya and David quickly resolved the issue and addressed any concerns I had. David came back few days later for final inspection to bring the entire system online, and he was very helpful while explaining all the details of Powerwalls and solar system. Lastly, when I noticed few uneven panels and notified David, they sent the install crew back out the next day to fix the issue which was greatly appreciated. The system is working perfectly and producing much more than estimated on the proposal so far. I couldn't be happier how easy the entire process was and how Longhorn Solar handled everything, will definitely be recommending them to neighbors and coming back to them for any future services

Greatly Lacking Customer Service

Very, very difficult to get in touch with a live person. Very confusing email traffic and MANY unanswered voicemails. Warranty is not a thing apparently, they came out on a warranty call and charged me for 2 hours when the guy was at my home LESS than 20 minutes! Then said it wasn't covered under warranty. THEN sent me a bill from another company for $329.88! AFTER I called and complained that the guy was NOT here 2 hours but 20 minutes! They argued that He had to drive here. Hmm, how else do you think he was going to get here? I am not paying him! he doesn't work for me! he works for you! Terrible company! The tech also showed up 2 hours late. Solar Panels (16) AU Optronics Model:PM245P00_250 $4,100.00 Inverters (1)SMA America Model:SB4000TL US-22(240V) $3,650.00 Balance of System $2,100.00 Labor $3,090.00 Sub-Total #1 $12,940.00 Thank you for choosing Longhorn Solar to install your solar photovoltaic (PV) system. You 4.00kW system consists of: 16 – AU Optronics Model: PM245P00_250 The Solar Panels have a 10-year warranty. 1 – SMA America Model: SB4000TL-US-22(240V) The inverter has a 10-year warranty.. The balance of system (fuses, wires, disconnects, etc.). We offer a 10-year warranty on our installation of these components If you have any questions, concerns and/or warranty issues, call us Monday – Friday 8:00am – 5:00pm at 512-837-4800.

No real interest in providing quality service

Extremely poor quality work and supervision. Subcontracting out work to inferior and inept contractors. Would not return phone calls for service / warranty request. Keeps contacting me offering a reward to help them find new customers - like I'm going to do that based on how I have been treated and the poor quality of work they performed.

Solar System Satisfaction

Selected Longhorn Solar because of their detailed sales presentation and initial design. Guided us through selection of equipment / configuration options giving us the detailed pros & cons of each. Wanted to deal with an experienced supplier/installer rather than a broker. Looking for that one accountable company. We got a detailed design, a performance warranty and Longhorn Solar handled all permitting both through CoOp and HOA. System was installed in 29 days less than originally estimated and has been working flawlessly since commissioned in January. Price was competitive, communication was solid. Crews showed up when promised and did a great job of cleaning up debris. Hopefully after sales support will be the same great experience.

They should hire me for project management because I did a lot of the coordination work (they should be doing this!) on the solar project at my home. Frustrating when no one at Longhorn calls back nor emails back (this happens frequently. I eventually get responses but it's because of my constant follow-ups), an appointment resulting in a no show from their tech person, an old part (trash) disposed on my property grounds, technical issue that took awhile to get resolved, etc. All the problems have been post sales installation and post sales service. The best part of the process was the sales. In fact, Longhorn Solar’s salesperson Ron Martin is outstanding. This recommendation is strictly in regards to Ron Martin who demonstrated solar knowledge expertise and excellent customer service … many times above and beyond. He’s friendly and returns calls. Sometimes when a salesperson completes their sale, one never hears back. But Ron has always been reliable in getting answers for me, even after the purchase was made. He has also visited my home to further explain the solar system and walk me through the apps. I recommend Ron Martin wholeheartedly.

Poor customer service

We got our 12kw system about 10 years ago. The first couple of years, they called me regularly to make sure everything was running well. A year ago, I noticed one of my inverters was showing zero amperage. I called to report it. About 2 months later someone finally called, saying they’d check it out and let me know. I never heard back. I’ve called 6-7 more times, and no one calls me back. I called again 5 days ago. A woman called 2 days later saying someone would call me in 48 hours. I’m still waiting! Unacceptable.

Great Install and Even Cleans Up Other Companies' Messes

Longhorn did my initial install in March of 2021 and I have had absolutely no complaints about their work or my solar production. I had one issue with a panel in late 2022 and they sent a tech around to check on it and fix it without any additional cost. Then this past June, SolarEdge, the mfr of my inverter, contacted me letting me know they were shipping a new inverter because there was an issue and it needed to be replaced. An appointment would get made with Longhorn to do the swap. However, SolarEdge contracted with Sunnova instead of my installer to do the work. The guy was barely understandable but told me they didn't have a cellular card to put in the new unit and said he would get one and be back out in a couple of days to install it. I never saw that guy again. After communicating with Sunnova and SolarEdge on several occasions about this issue, it was clear they weren't interested in making it right. So I contacted Longhorn and they made some calls and were able to get SolarEdge to send a new card; as soon as it arrived, Longhorn was at my house doing what Sunnova wouldn't do. All for free. Thank you Jeffrey Jones and Matt S. for all the help and friendly service!

Maintenance

This company’s response to problems with their equipment is terrible-no response to email/texts. 2 weeks of contacts before a real person responds. Our inverters have stopped working at least 3 times since installation.

Jameson Dillon, Sales Manager

My experience Jameson & Longhorn Solar Inc. was great. I would recommend Longhorn Solar to others. I am more than satisfied with there performance and cooperation. I originally had a 42 panel system installed with out batteries in 2017 (based on 80% average usage). Problem was when the grid goes down the panels are useless. System upgrade: Longhorn Solar installed a TESLA (2)battery system last fall and then 8 additional panels this spring. Love the system and on most sunny days I am able to operate 100% self powered! Wow...

10 percent won't buy you time of day

I signed my contract with Longhorn Solar at the end of August 2021. Here it is September 27, 2022 and my system is yet to be installed where it will pass even a simple test of turning off the Grid power and seeing how long we can live on our Sonnen EcoLynx20 battery. Test FAILED at one hour and it powered down the whole house with 86% battery charge showing remaining. Attempted to address this issue with Sonnen, whatever changes they made powered down the battery completely. I was told I could power the battery back up and all should be well. Not a chance, battery will not power up, we are dead in the water as far as battery backup goes. Sonnen said that given it would not power up I needed to talk with my installer to remedy the situation. I contacted them over 10 business days ago and copied in everyone I had an email address for and all I have heard is crickets. Today we heard reports that thousands of folks in Austin are without power, luckily not us, however my wife heard that story and she is not at all happy and called Longhorn today to receive a message that the tech support folks had forgotten that we were down. If you decide to go with this company demand a 40% 30% 30% payment schedule, holding 10% of their final payment is not enough to even get the time of day from them with their standard 20 40 30 10% schedule. So as it stands now they have 90% of my money and I have no battery backup, no solar feeding into the system when the Grid power is turned Off and a very unhappy wife. I'm not very happy either and today my patience has ended also.

Could have been worse, but that's the best I can say

I would love to leave Longhorn a good review, but unfortunately I just can’t. The sales process was clear and smooth, but installation was, frankly, a nightmare. I’ve had many companies work on my house, and Longhorn is by far the least responsive and least reliable company I’ve worked with. I regret selecting them, especially since I’ll need to rely on them to service the system in the future too. I should have canceled my contract at the first sign of trouble. Don’t make my mistake. My install date was pushed back multiple times over two and a half months with little to no communication. I didn’t even know our late May date was canceled until no one showed up on the day the project was scheduled to start, even though I’d called and emailed my project manager multiple times that week to confirm it (she never returned my calls or emails). When installation was finally set to begin, there were issues immediately. Despite claiming they only use in-house teams, a subcontracted company installed my panels. The battery team from Longhorn and the subcontracted panel team were not on the same page, and in fact didn’t even know about each other at first. It took over a month and a half from the panels and batteries beginning installation to finally being completed. During that time, my voicemails and emails were almost never returned. I learned that I had to catch someone in the office if I wanted a response, but that I had to call outside of their daily morning multi-hour all hands meeting, where no one in the office is accessible at all. Even when I was rarely able to catch my project manager on the phone, she was almost never able to tell me anything other than that she’d ask her manager at the next day’s all hands meeting and call me back. Which, of course, regularly didn’t actually happen. When someone would finally be scheduled to come finish installation, usually 1-2 weeks out if I was lucky, they often failed to show up at all or didn’t send enough people to complete the work, meaning things would be pushed out another week or more just to get another appointment scheduled. It took over 3 weeks (and multiple missed or canceled appointments) just to get someone to come back out to commission the batteries when the panels were finally done. When my system failed the QC inspection, I almost cried out of frustration knowing it would take weeks and dozens of calls to get things fixed (which it did). I spent hours every week just trying to reach someone and get on their schedule. Fortunately, Danny became involved in the project towards the end. While he wasn’t able to single-handedly fix all of the issues Longhorn has and things haven’t been smooth even with his help, it was refreshing to be able to reach someone reliably and to be in contact with someone with the ability to get things rolling. I appreciate his efforts. I can’t imagine how much longer my project would have taken to finish without his help. When installation was finally complete, I was told someone would walk me through my system and that I’d receive an owner’s manual. It’s now been over two months and despite several requests, I haven’t received either of these things. With all of these issues, I’ve received a few vague apologies but no other efforts to make things right. As a business owner myself, if a customer had experienced all the issues I had, they’d be looking at a hefty discount at a minimum. Unfortunately, one of my batteries is already broken. It took over a month from reporting the issue to get someone out to work on it, and now a new battery has to be ordered, which will take at least another month. I understand that Longhorn has staffing issues currently. I would hope that a responsible company would adjust their project schedule to only take on the work that they can handle, but it feels to me that Longhorn’s goal is profit first, customer satisfaction dead last. I hired Longhorn for my project despite them being one of the higher quotes I received due to their formerly excellent reputation. I wish I’d gotten what I paid for.

Broken inverter 2 times in 3 months, system still down

Terrible experience with longhorn solar, got an inverter broken 2 times in 3 months. System still down. Total uptime for the system is not even 75% a year, which pretty much renders a 16kw battery useless. When offered them to amend to contract to account for their lack of support/warranty, they rejected it. Worst investment was not solar, when it works is great, worst investment was picking longhorn solar as the installer. Just stay away. Remember, my system is still broken. It was a $37,000 system paid in full in cash. But they don't care about that since I already paid. They claim there are logistics problems, with supply chain issues. However they continue to install new systems while mine is down. So it is not about a supply chain, but about priorities. Again, just stay away from them.

Do not honor warranty

Update: Installer corrected the problem by installing a new inverter, 26 days after reported. I paid a system in full with longhorn solar, the system did not last 1 year, a broken inverter. Longhorn keeps claiming chain supply issues while still getting new businesses, but not repairing mine. Their support system is basically none, one email contact that might or might not reply you in 3 days if you are lucky, and never gives a clear answer. I have a dead system, including a 16kw battery. Lesson learned, Look somewhere else, and force them to put a specific repair time window in your contracts.

7 month installation and still not complete

Longhorn Solar Inc., services San Antonio out of Austin. Signed contract in Aug 2021, panels installed Dec 31,2021 but not hooked up and today is March 31,2022. Lame excuses all over the place as to why the delay. My advice is use company with service people in your city, not serviced remotely. My probable guess is Longhorn has only have 1 certified electrician to service San Antonio, traveling out of Austin. They have missed promised appointments without a phone call . When I call to ask why not showing up? Admin girl says she does not know why and resets. Here is one example of miscue: The onsite certification inspection meeting, final step before solar meter is installed, with CPS, failed because paperwork did not have an stamp. Inspector stated he would lose his job if he approved install without the stamp on documents. Seems like Longhorn is cutting corners. Inspector found other issues and was kind enough to help new electrician know what was missing. I am now glad someone is reviewing Longhorns work because I do not know the codes; 3 weeks later and still no resolution only missed another scheduled meeting.

Professional and Thorough

I was hesitant about getting solar installed from the horror stories I’ve heard. Well I have to say there is a reason Longhorn Solar has been around for as long as they have. They didn’t try up sale me on a system I didn’t need were very thorough every step of the way. Even when through no fault of there own when weather conditions prevented them from installing my system on the scheduled date. They made up for it by coming out the next day with double the crew to install the system. Now I am looking forward to geeking out with monitoring system and watching my system safe me money. Also continued work with Longhorn Solar in the years to come.

Forthright Solar Installer

Longhorn Solar is a local company committed to customer satisfaction rather than growing larger. The sales rep knew her stuff. The original proposal was scaled to our current electric consumption. After we checked out some reviews, people said they wished they had purchased a system to accommodate increased energy needs over time. The Longhorn rep put together a new proposal to cover 120% of our current usage. I am glad we went with the larger system and battery. Everyone we interacted with at Longhorn was trustworthy, professional and personable. It's a process. Things don't always go as planned, but Longhorn kept their promises. The service, expertise, quality and value are there. I would highly recommend Kathie Millen and her team to set you up with the right solar system.

Super helpful to new owners!

We purchased a home a year ago that had panels installed by Longhorn Solar - but we knew very little about whether they were working as they should or what maintenance they might need. We reached out to Longhorn and talked with Jameson, who responded really promptly to my inquiry. He was able to view our panel's performance remotely, and let us know that there were a few components that needed some repair/optimization. (It is an 8 year old system.) Then he informed us that the repairs would be covered under the warranty, which was a big surprise, as warranties don't always transfer to new owners. We are really happy to have panels installed by a company that stands by their equipment and installation no matter who owns the property - and were really grateful for Jameson's excellent customer service!

Great Folks - Ethical and Dependable

Longhorn Solar is an ethical and dependable company and they provide results. They listen and do not over-sell their products. They truly have their customer's best interest in mind !

Overall very happy with Jameson and the installation crew

Easy process and amazing install crew!

I live in Jarrell and Longhorn solar just installed panels on my home. The process was quick and easy and the installation team was very proficient and friendly! Would highly recommend them!

System down 6+ weeks

My system has been down for over 6 weeks. Whatever they tell you, they don't monitor your system for you. I left multiple messages on their service line, over a week, all were ignored. Finally got a hold of someone in person and scheduled a service date (no mention of the previous messages they failed to return). The first available service date they gave me was in three weeks. Three weeks! Three weeks longer to wait until someone can even come out and look at my system. I'm really disappointed in Longhorn solar for misleading me in terms of how they "monitor" my system as well as an utterly unresponsive service team.

Update, 14 months of using our Solar Panel System

Longhorn Solar sized & installed our Solar System 14 months ago. The system is producing per original objective. It is really gratifying that we have not had to pay an electric utility bill over the last several months having accumulated so many credits with our electric provider. We suffered hail damage on our roof during the first quarter of this year. Our panels, all mounted on the carport, were not damaged and continue to produce. Bottom line, we are very happy with the system Longhorn Solar installed for us.

Longhorn Solar is Exceptional!

I decided to write this review because when my husband and I decided to invest in solar panels for our home is was difficult to determine which solar company to use. We met with a group of ten interested neighbors and after studying the reviews and talking with numerous solar company representatives we all voted to go with Longhorn Solar. That was in 2015. Longhorn did an exceptional job for all of us. Everyone was highly satisfied. I am submitting this review now to inform anyone who is thinking about purchasing solar panels that Longhorn Solar not only was the right choice 6 years ago but Longhorn continues to be the right choice today. The Critter Guard under our solar panels came loose and I decided to call Longhorn's customer service to find out how I should go about getting it repaired. James sent out one of their installers to take a look at the problem and then he called us to say that Longhorn would reinstall it at no cost. Once again Longhorn Solar exceeded our expectations. Longhorn Solar is truly a company that stays committed to its customers. I recommend Longhorn Solar to everyone and anyone wholeheartedly!

Solar panels plus battery backup.

We’ve had our system since June of 2020, and we are very pleased. Part of the system included a backup battery that covered about 8 circuits in the house. During the freeze, we were able to keep warm using electric blankets that ran off the battery, even though the panels were covered in snow. Every time the power cycled on during the rotating blackouts, the battery would recharge. That was an unexpected bonus.