After meeting with several solar installation companies, we chose 603 Solar to install both our solar panels and an Enphase home battery system last Aug/Sept. We have been very happy with our choice. From our first consult visit through installation, the attention to detail, service and communication was exceptional. The Enphase battery initially had a glitch. Zach went above and beyond with Enphase to ensure it was resolved quickly. Zach (and the entire team) have been hands on, helpful and responsive from day one through post installation support. Our first electric bill is down 95% and we have had two short outages since installation, the battery worked seamlessly. We have found 603 Solar to be a company that truly lives up to their mission statement and highly recommend them to anyone considering a home solar project

Quality and workmanship on the install was excellent. Great product and system installed! Very happy with the process and the way the team handled paperwork and approvals.

Start to finish 603 solar has been exceptional. Estimates were straightforward, install was smooth, connection was painless. Jeff worked with us closely throughout the whole project. 10/10 will recommend.

Everything well explained, with fast installation and quick turnaround.

From the sales staff to the installers and the folks in administration and support, everyone was courteous, professional, and helpful. We're thrilled to finally be generating green energy! Understanding how easy the process is, we wished we had done this a long time ago. Update on ROI & Payback Period: Standard payback calculations often miss the full financial picture by focusing strictly on monthly electric bill savings. A realistic solar evaluation should factor in several key dynamics: Property Value & Home Equity: A significant portion of your array's value can be recouped upon selling your home—a trend likely to accelerate with growing EV (electric-powered vehicle) adoption. Furthermore, many NH towns have adopted RSA 72:62, which explicitly exempts the added value of a solar array from local property tax assessments. EV Offsets: Sizing an array to power both your home and an electric vehicle replaces expensive gasoline costs, shortening your overall payback timeline significantly as fuel prices rise. Supplemental Heating Savings: If you use mini-splits to supplement an oil furnace, solar energy lets you run heat pumps cleanly during shoulder months (fall and spring), cutting down on costly heating oil consumption. Generating your own solar power locks in your electricity costs against utility hikes, while powering an electric vehicle at home extends that same price protection to your driving. Once the system is paid off, your marginal cost to generate power drops close to zero.

603 Solar, and Jeff specifically, have been nothing but excellent the whole way through. I had done a good bit of research but Jeff spent multiple phone calls and hours of his time explaining things in detail and sharing knowledge that exceeded what I had read. That was all prior to me committing to any work to be done. I requested specific panels and inverters for our project, Jeff made it happen. I requested a small change after install, Jeff answered and got it sorted out as soon as possible. I am writing this 4 months after install and Jeff still is willing to take my phone calls and ensure I’m very happy with the product I received (not to mention it has been great to produce all of our own power!). 603 Solar is where you will know your solar investment is done right and service doesn’t stop just because your install is complete. Thanks again!

If your thinking about transitioning to a solar system look no further than 603 Solar. From start to fininish prepared to have a professional at every step of the way. Jeff in sales was very knowledgeable and answered all of our question in full detail. The evaluation of the roof and positioning of the panels was completed in fine detail for maximum efficiency. Lastly the install team was terrific. They showed up on time, worked on the roof safely and had years of experience. This led to a great system install that looks amazing and is highly productive. I am going to use 603 again to install whole home batteries. Highly recommend them.

I highly recommend 603 solar. As a person who does most every project for myself, I wanted to say that this has been a very positive experience. In a time when most of us dread the thought of any contractor working on our homes because of poor service, poor schedule and questionable quality, I must say this has been exactly the opposite. The communication leading up to the install was excellent. I always had a very good idea where the process stood and the very few questions I did have were answered very quickly. The salesman, Steve, actually knew his product! The initial tech Keith was a pleasure to work with. The internal staff was great. Your subs were even better. Tyler and Caleb from 603 Electric were excellent. Their communication was great. From the call to ask if they could start a day early to their willingness to start work at 530 am to beat the heat, they were professional and hard working from the instant they arrived till the job was done. The quality of work looks great. They listened and actually routed the wiring where I asked without any objection. They cleaned up any and all evidence they were there, and even moved all the patio furniture back in place. Very thorough, professional and thoughtful crew! From everything I have seen, you run a great organization. Keep up the good work. I look forward to years of service with the system.

STOP - See alert below!!! If you are checking reviews before buying a solar system you have found the right company. 603 Solar is: - Professional - Knowledgeable - Flexible - Zach delivers on his promises and no BS. ... Just like it used to be in the old days. 603 Solar has just installed a high quality system for us using high quality components. UPDATE During the first month, the system produced 3.6 MWh which if billed by Central Maine Power would cost between $880 to $970. In other words it equals a paycheck of approx $1,500 that I would have to earn BEFORE TAXES, ALERT Be on extreme alert if you are talking to "installers" or sales people from companies that are more interested in having you sign a contract than discussing the system. They may offer you a 30% rebate with some convoluted contract or lease agreement. CAUTION. The fine print is NOT presented up front. But it turns out that you only gain a few PERCENT (not 30%), and what happens if you end the lease early? Penalties? Bottom line - BS A solar installer should offer installations not convoluted attorney arrangements. Did this alert help you?

603 Solar is been amazing. They are professional, timely, and great communicators. We were blown away by how seamless and easy the whole process was.