Rated 2.71 / 5 from 28 reviews
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Mercury Solar Mercury Solar is an experienced group of solar experts. We specialize in cost-effective solar designs that provide renewable solar energy to residences and businesses in Honolulu and throughout Oahu and the rest of Hawaii. Our team of solar energy professionals has been working in the local solar industry for nearly 35 years, a fact that sets us apart from the competition as being one of the most well-established Honolulu solar panel companies.

We reduce and eliminate the dependence on oil imports used as an energy source, resulting in enormous savings for our residential solar and commercial solar clients.
Business details
  • Year established: 2007
Services
Battery Solutions
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Over the last few years, the solar industry in Hawaii has been encountering more and more roadblocks.
Water Heating
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The history of using the thermal energy of the sun's rays to heat water for residential or commercial purposes dates back hundreds of years to the mid-18th century when a Swiss scientist developed the first incarnation of a solar water heater. More than 100 years later, an American plumbing manufacturer built the first solar water heater to be sold commercially.
Solar Cooling
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We are surrounded by heat; humans generate heat through engines, air conditioners, and other modern conveniences. This heat can be beneficial as wherever there is waste heat, it can be used to heat water or accomplish solar cooling.
Commercial
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With a history of more than 30 years serving residential and commercial customers on Oahu, Mercury Solar is recognized as being among the preeminent Honolulu solar panel companies.
Residential
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Hawaiians pay an average of nearly three times more for their electricity per kilowatt hour than homeowners in the rest of the United States do, which is only one example of the many ways in which the cost of living is higher on the islands than it is on the mainland.
Reviews (28)
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Max Y.
May 28, 2022
Our original water heater panels were installed by Mercury Solar over 30 years ago. My current water heater is leaking and is need of replacement. I emailed Mercury Solar twice and have yet to receive a response of any sort from them. In this time of supporting local businesses, I feel very disrespected that no one at Mercury Solar cares.
Tim D.
Apr 13, 2022
I just wish I could get my solar panels, it's been since May 2020 when we signed the contract and here April 2022 we still don't have and we have been paying the whole time without nothing to show! We're pissed!
Jeri E.
Feb 11, 2022
I have been a Mercury Solar customer since 2016 and I have saved thousands of dollars on my energy bills. The owner Scott and his crew are awesome people and have been so helpful to me over the years. The entire process was handled professionally and my questions were answered every time. I really appreciate the thoughtful help of Ms Sue in the office.

She is the best! Mercury is a company that follows through on their promises and is not afraid to educate you the consumer on how to save money with solar. Cutting edge battery systems are their specialty so don't miss out on the wave of energy savings. Contact Mercury and get started saving today. Jeff E (Kaneohe)
Patricia Costales D.
Jul 03, 2021
My husband and I have been making payments for a year on our system that we don't have yet. We can't even get a straight answer about what is taking so long with the permit. My husband called the permit office and they said that it was canceled. He has tried to talk to Scott about it and still no resolution. They keep offering to send money to off set our electric bill, but we had to claim on taxes. We just want our pv system installed.
Aloha T.
Mar 02, 2021
I have been using Scott at Mercury solar for years. They started great, but as of 2021, they are falling apart. They do not return my calls or deal with my warranty problems. They have been overwhelmed, while a few of their electricians have quit and informed me that they use unlicensed people. I visited their office and it is a disaster area with files and equipment everywhere, almost as if they were about to move, but that's the way it's been for a long time.

I gave these guys a lot of chances, called and emailed dozens of times over a year, waiting for repairs, dealing with problems with my panels and batteries. I have been very patient, but I no longer can recommend them. There are dozens of solar companies out there, so find one that is better organized and more responsive.
Patricia Q.
Feb 20, 2021
Mercury Solar came through when others failed. Sue was the first contact & Scott recommended the array. The Solar Pirate crew did the installation very courteous & professional. They were respectful of our questions & request. Rico came by later to assist me with the internet connection. I would definitely recommend Mercury Solar without hesitation.
Henry Pedrina
Dec 11, 2020
I've tried for well over a month to have them contact me in regards to warranty for my 120V inverter that has been bypassed for over a year. The only status I've received is that they're working with the vendor for a warranty replacement. My 240V inverter is probably being overworked now because I'm woken up in the dark twice in the past week. Have they gone out of business due to the COVID-19 pandemic? I just want a phone call but they don't take the time to do that. Why I keep giving them good reviews I don't know. I won't be doing that much longer that's for sure.
Ray S.
Nov 06, 2020
Been working with Mercury Solar since I first installed the solar panels for the water heater 15 years ago. Added photovoltaic and batteries about 5 years ago. Took a while for Scott to get back to me however, we finally got things worked out. I am awaiting replacement batteries as he honored the warranty on the older batteries that were not charging properly. Installing more panels for the AC installation. He is extremely busy and gets back to you when he can. I will post again after the additional panels are installed.
Micah W.
Sep 04, 2020
Scott and the team were very helpful. It took a while to get the batteries but we were up and running as soon as they arrived. Scott was available to make necessary adjustments as needed and the system has been running great since April 2020. Looking to increase capacity later this year:
Daniel Tauai
Feb 19, 2020
I also give zero stars. They have consistently ignored my property managers' and my phone calls, emails, and messages left at the front desk, to have them conduct repairs that are covered by the warranty (on PV panels they installed). At one point, the main supervisor Rico said he "cannot afford to do non-income producing work right now." I understand businesses can get weighed down, but they have been dragging their feet on this for a whole year now, and I've heard every excuse in the book.

If you're looking for reliable PV/Solar contractors, I do NOT recommend these guys. I will be filing an official complaint. ----------------------------------- Rico, In response to your response: 1) This is a very strange place to talk business. If you returned the phone calls or emails as promptly and as thoroughly as you just did here, I probably wouldn't need to post this review. 2) We are tracking the unpaid invoice, but it literally has nothing but a dollar amount on it.

My property mgrs have requested a "line-item" invoice, with the date of services and an explanation as to why the price exceeded the originally quoted price. And they also need a signed W-9 from your company so they can input you as a vendor and process your payment. You are currently holding up the payment by not sending this info. 3) I'm looking at the warranty, and it says "comprehensive guarantee on all workmanship, and misc. equipment for 10yrs." 4) as for your suggestion to move ahead, the Canadian company that manufactures the parts we need does not ship to Hawaii, however they are willing to pay for the replacement costs.

But they need the serial numbers of those parts so they know what to replace. My property mgr has requested this info from you with no response. Is there anything else that you need from me in order to get the above mentioned info to us, so we can pay you and get the ball rolling? Mahalo, Daniel
Jana E.
Feb 04, 2020
Mercury solar installed a water heater system for one home - no problem. They also installed a water heater and PV battery system for my primary residence. Very disappointed with the service I have received. Spent more than $50k and still not working right since 12/2014. I would honestly say it worked less than 75% since installation. Called numerous times. Changed out batteries, checked inverters.

No calls! Fought with the receptionist in the past, telling me other people who paid more is still waiting to get their system fixed. Unreal! I escalated it to the owner and it was fixed. Months later, back to square 1 again as my system not working again. I also offered to purchase the updated batteries just to get it working. Made more calls, and still waiting for someone to fix! Irritated! Tired waiting. Just gonna make a complaint to Better Business Bureau. Hopefully things are resolved soon.
Ryan G.
Oct 29, 2019
Mercury solar came through when others told me they could not help. So glad I chose them.
Jacob M.
Oct 07, 2019
Best solar you'll ever get. Very experience workers. Can't beat the price. I paid $132,000 10 years ago, now with mercury same unit $10,000, and I can use batteries as back ups if I want, where I am unable to with my unit now. Choose Mercury before Sun Run
Robert N.
Sep 09, 2019
Just an update. It's been over a year since I wrote that review. Still dont have a working battery.
Richard Currie
Aug 21, 2019
Tried for over six months to get a warranty repair for bad workmanship. The owner Scott is rude and could care less about honoring his warranty after he gets paid. STAY AWAY FROM THIS DISHONEST BUNCH OF WEASELS!
Rob Pila-Newville
May 07, 2019
Zero stars ideally. Paid them 46k a year ago. They installed a broken battery and won't return calls or give any time frames about getting it fixed. You cease to be a important the moment you pay them.
Paul K.
Mar 06, 2019
Mercury solar is a great solar company! Their customer service is responsive. Their pricing is extremely competitive and their products are proven to last. After calling other more "well known" companies, I got a quote for a battery back- up system from Mercury. The people were prompt, friendly and the price was literally thousands less than all other competitors.

I also have a solar pv system that Mercury installed over 5 years ago that is still going strong! Why go anywhere else when Mercury has the best of all worlds. Were they perfect? No. Of course not. What company is perfect? If someone claims to be perfect they are either lying or delusional. There were some communication issues in the beginning, but nothing major that couldn't be worked out.

Overall 4.5 stars and would highly recommend to all friends and family. Please give them a call because you have nothing to lose. They give free estimates and are happy to discuss anytime.
Clint Y.
Mar 01, 2019
I recently installed a solar water heater and over 20 PV panels at my home. Scott was very knowledgeable about the system, and his crew worked hard to get the installation done. The only issue was the battery for the system was on back order so that caused a little delay but nothing Mercury could have done since they were waiting for their distributor to send them the batteries. Otherwise, I would have given a 5 star rating.

I called in to get assistance on using the mobile app and Rico was very patient and helpful with me. He helped walked me through learning how to navigate the app as it was new for me. I did research and checked other companies and choose Mercury because of the personal touch added by Scott and being a local company. Scott also helped me understand the what to expect with the federal and state tax credits. Mercury also partners with a bank that helps with excellent financing so no money is required up front for 2 years. That is such a help benefit! I would gladly recommend Mercury to my friends and family.
Margaret N.
Feb 19, 2019
We recently had Mercury Solar install nine additional PV panels at our home, in addition to the existing Net Metering system which they installed on our roof several years ago. They got it done in a short period of time before the end of the year, as we required. We selected Mercury Solar for this installation in large part because of our experience with them.

It started over 20 years ago, when they installed our solar water heater system. The excellent service they provided for that system was a major factor in our decision to have them install our initial PV system, as was the knowledge of their sales representative, a former installation tech. We were pleased with the installation of that PV system as well as its performance.
Sara E.
Sep 27, 2018
We purchased blazing tubes and a hot water tank. The salesman assured us they had cracked the code with permitting, and sure enough the company had the tubes installed within 3-4 weeks. But almost a year later we STILL don't have the new hot water tank installed that we PAID FOR almost A YEAR AGO. Every time we call we get one excuse after the other. My opinion is with all the solar options on the island, this one shouldn't be your first choice.
Judy L.
Jan 31, 2018
After the technician Adam left the company, it appears the company can no longer provide post sale service. I purchased a lot of solar panels from this company, however, after few months, I noticed my electricity bill went extremely high. My guts tell me something must have gone wrong with those solar panels. I called since last September and so far no one came.

They don't even bother to just check. The scheduler Winnie kept telling me there is no one available. This is unbelievable! Once panels are sold, no service anymore even they said at least one year warranty for repair but I guess it was only on paper. You can throw thousands on purchasing the panels from this company but be prepared you won't have any service after installation. It's pain to deal with this company. I learned my lesson. I'm telling everyone not to go with this company.
Arun S.
Jan 19, 2018
I have used Mercury Solar at different homes over the past twenty years. I have been happy with pricing and installations. More important to me than the actual installations is the after sales service. Whenever I have had any issues, they have promptly addressed my concerns. I would recommend them for hot water solar panels and photo voltaic panels.

I was able to take advantage of both the federal and state tax credits. You should check if you can with your tax accountant as it plays an important part in the decision. Any installation on a roof has impact on your roof, so make sure you are happy with the contracts you get
Dan S.
Jun 26, 2017
My experience with Mercury Solar was not as pleasant as advertised. The salesman was clearly good at his job; they oversold a product with average quality and below average customer service. Their financing offers are misleading and complex. The state and federal tax credits they claimed would make this installation affordable never materialized. Thus, I was stuck with a bill nearly twice as expensive as originally quoted.

I was promised installation of my backup battery system in January of 2017. It is now June, and I have yet to see any batteries or even have my panels wired into the grid. They remain useless on my roof. I've tried to work with their team to resolve my situation, but they have been reluctant to communicate with me since I shared my qualms with them months ago.
Venkataraman Balaraman
Oct 25, 2016
We first were introduced to Mercury Solar in 2010 through friends for installation of solar PV panels. Because of finances, at that time we chose to install only 20 Panels instead of a recommended 41. The paperwork process by Mike, the sales person representing Mercury Solar was very efficient. The process of getting the HECO permit done at that time was a little more arduous but we got the whole thing set up for Net metering by early 2011.

Since then, we have been pretty impressed by the near perfect assessment of cost savings on our electrical bill. Now in 2016, after a lot of thoughts, we have embarked on our second installment of solar project to get to a state of minimal dependency on the grid. With continued HECO rate hikes, we feel that we need to be in forefront of being environmentally conscious.

In order to preserve our initial Net Metering agreement with HECO, we are going with Battery storage option. Compared to some of the quotes for installation I received from other vendors, I was again pleasantly surprised by the quote from Mercury Solar which was very reasonable and they worked out an excellent deal to minimize out of pocket expense.

Our solar panels have been installed expeditiously and we await our assessment of the success of this investment as we wait for installation of the batteries - a slower process. At this stage, our family has been impressed with the professional work done by Mercury Solar and we wholeheartedly would recommend Mike and their services to anyone contemplating installation of PV Solar Panels
Imelda Andal White
Jan 26, 2016
Mercury solar saved me a lot of money, from $168.04 went down to $81.58. Thank you very much.
John L.
Dec 28, 2014
When solar was first starting to pop up everywhere, we couldn't it afford it because most companies wanted payment up front. But Mercury Solarvmade it very easy for us to afford PV system. Boy was it worth it. The company had great reviews and is one of the leaders in solar installation in Hawaii. Fast, efficient, trouble free installation. Helpful, knowledgeable. I highly recommend Mercury Solar if your looking for a company to install a system on your home.
Stanislava K.
Dec 11, 2014
Knowledgable team that expertly answered all my questions and concerns about solar energy, future savings on my electric bill, their service and effect for the environment. I was very pleased overall and would recommend to anyone who is looking for a solar company with long lasting leadership, backed by many years in business.
Julie C.
Mar 15, 2014
We used Mercury Solar to install PV panels and it was NOT a good experience. The first red flag was when they showed up to install the panels and the guy installing them was on the phone with his boss telling him how to put the panels in! After the panels were installed the roof started to leak where they had drilled holes in the roof. We complained about it, but they insisted that this was not due to them, when clearly the hole in the roof was due to the panels.

This finally was resolved. The panels appeared to not be working well and there was not much energy created. We called them again and they informed us that the Sunny Boy they installed was too small for the number of panels that were put in! Really! You would think that they would know this! The Sunny Boy was changed to a larger one. Today, panels still not generating much power.

There are 28 panels and the estimate it that they should produce about 500 kWh but it is only producing about 70-200 kWh. I have called them to discuss this issue, but no one calls back. Basically my electric bill went from $300 to now $250. I would NOT recommend this company. They are very eager to sell you expensive panels, but they don't want to follow up with you when there is an issue. Poor customer service!