--- title: "Portside Renewables LLC." description: "Portside Renewables LLC is a solar company in Mattapoisett, MA, and its own website says it has been in business for 19 years. In its own description on th" doc_version: "2026-09-28" last_updated: "2026-09-28" --- # Portside Renewables LLC. **Trade:** Solar Installation · **Address:** 23A County Rd, Mattapoisett, MA 02739 · **Phone:** (508) 470-1467 · **Website:** http://www.portsiderenewables.com/ · **Languages:** English **Rating: 4.2/5** (medium confidence) — from 9 reviews across 5 sources. 100% of sentiment-scored reviews read net-positive. Last 6 months: 4 reviews, 0 negative. ## The honest read Portside Renewables LLC is a solar company in Mattapoisett, MA, and its own website says it has been in business for 19 years. In its own description on the Better Business Bureau, the company lists residential and commercial solar systems, battery storage, EV chargers, off-grid systems, and service and repairs. Its construction supervisor licence, CS-102054, held by Michael J Rotondo, is active on the state registry. In a 2026 Google review, Mike quickly resolved a problem with a 12 year old solar panel array whose original installer had gone out of business and got it back up and running. A solar tracker system is "all up and running again 100%" after its owner was referred to Mike, according to another 2026 review. In a February 2026 account of a system installed over 10 years ago, a crew replaced a faulty MMU, the monitoring and control gateway for a Tigo Energy Maximizer, then checked and repaired faulty wiring across the whole system; by making sure the inverter was working, they saved the owners thousands by not needlessly replacing it. That job had a few hiccups, and Mike and his team called and came by to make sure the system was working properly. On new systems, a 2026 reviewer has not had to pay an electric bill since Portside Renewables installed solar panels 1.5 years earlier. In another 2026 review, a system went online Jan 1 2025 with no electric bill since. A recent review describes working with the team to expand a poorly designed system, with prompt communication, clear pricing and a transparent process. In a 2026 review, Mike and Diane were informative and responsive, and the Portside crew was neat, clean, timely and respectful of the home. In 2026, a post on linkedin.com said the team's "extensive roofing background made this project not just possible, but successful." **Strengths:** - Older system repairs — 2026 fixes on arrays whose installers went out of business - Solar tracker repair — a 2026 system running again 100% - Clear pricing — prompt communication on a recent system expansion **Concerns:** - Repair hiccups — a 2026 repair had a few before Mike's team came by ## Claims & citations Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication. - Says it has been in business for 19 years _(confidence: medium)_ - [Official Website](http://www.portsiderenewables.com) — “Self-reported 19 years in business” - Repaired a 12 year old solar panel array whose original installer had gone out of business (2026) _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25sWU1WRnNTRmR5VW5CUVJWTjNXRmQ2UjJ4bmJXYxAB!2m1!1s0x0:0x4e0cc910ba33febe!3m1!1s2@1:CAIQACodChtycF9oOnlYMVFsSFdyUnBQRVN3WFd6R2xnbWc%7C%7C?hl=en) — “5★ Excellent service and quick response! Professional and knowledgeable. We had an issue with our 12 year old solar panel array, and we didn…” - Got a solar tracker system running again after a referral (2026) _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2kweWJVNTRXa3ByWlRkUU4xSXhUV2RwUmpBNVJrRRAB!2m1!1s0x0:0x4e0cc910ba33febe!3m1!1s2@1:CAIQACodChtycF9oOi0ybU54WkprZTdQN1IxTWdpRjA5RkE%7C%7C?hl=en) — “5★ Great job! I didn’t know anyone that could work on a solar tracker system. I was referred to Mike and it’s all up and running again 10…” - Replaced a faulty Tigo monitoring gateway and repaired faulty wiring on a 10-year-old system (2026) _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2kxbmR6aERiMXBYU0hsRVZsUjFZbFpFYWs1bFUzYxAB!2m1!1s0x0:0x4e0cc910ba33febe!3m1!1s2@1:CAIQACodChtycF9oOi1ndzhDb1pXSHlEVlR1YlZEak5lU3c%7C%7C?hl=en) — “5★ We originally had our system installed over 10 years ago. The installing company is out of business. Our system stopped producing and we …” - Owners report no electric bills since their solar installations (2026 reviews) _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT201NWRsTlZWa3BsWkRKaFlXbFVOV2R4YjNkUWFtYxAB!2m1!1s0x0:0x4e0cc910ba33febe!3m1!1s2@1:CAIQACodChtycF9oOm55dlNVVkplZDJhYWlUNWdxb3dQamc%7C%7C?hl=en) — “5★ Great Company! Mike and his team are not only very knowledgeable and professional, they also provide superior customer service. I love my…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xKc1NFaG1PWFV6U1hvMVRVY3dhMk40WkZKM1pHYxAB!2m1!1s0x0:0x4e0cc910ba33febe!3m1!1s2@1:CAIQACodChtycF9oOlJsSEhmOXUzSXo1TUcwa2N4ZFJ3ZGc%7C%7C?hl=en) — “5★ Was such an easy process working with Portside Renewables. They are incredibly knowledgeable and walked us through every step of the proc…” - Prompt communication, clear pricing and a transparent process on a system expansion (2026) _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2t3elpXVjFRVXhTTVhSS1oybG1ReTFqTWxCaWNtYxAB!2m1!1s0x0:0x4e0cc910ba33febe!3m1!1s2@1:CAIQACodChtycF9oOkwzZWV1QUxSMXRKZ2lmQy1jMlBicmc%7C%7C?hl=en) — “5★ We worked extensively with the team to expand our poorly-designed system. Mike and his team were amazing - patient, knowledgeable, and cr…” - A 2026 repair had a few hiccups before Mike and his team came by to check the system _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2kxbmR6aERiMXBYU0hsRVZsUjFZbFpFYWs1bFUzYxAB!2m1!1s0x0:0x4e0cc910ba33febe!3m1!1s2@1:CAIQACodChtycF9oOi1ndzhDb1pXSHlEVlR1YlZEak5lU3c%7C%7C?hl=en) — “5★ We originally had our system installed over 10 years ago. The installing company is out of business. Our system stopped producing and we …” - 5 stars from 46 Google ratings _(confidence: high)_ - [Google](https://www.google.com/maps/search/?api=1&query=Portside%20Renewables%20LLC.&query_place_id=ChIJWzFKSRAcuYwRvv4zuhDJDE4) — “Google: 5★ from 46 ratings” - Specializes in Solar Installation _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25sWU1WRnNTRmR5VW5CUVJWTjNXRmQ2UjJ4bmJXYxAB!2m1!1s0x0:0x4e0cc910ba33febe!3m1!1s2@1:CAIQACodChtycF9oOnlYMVFsSFdyUnBQRVN3WFd6R2xnbWc%7C%7C?hl=en) — “5★ Excellent service and quick response! Professional and knowledgeable. We had an issue with our 12 year old solar panel array, and we didn…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT201NWRsTlZWa3BsWkRKaFlXbFVOV2R4YjNkUWFtYxAB!2m1!1s0x0:0x4e0cc910ba33febe!3m1!1s2@1:CAIQACodChtycF9oOm55dlNVVkplZDJhYWlUNWdxb3dQamc%7C%7C?hl=en) — “5★ Great Company! Mike and his team are not only very knowledgeable and professional, they also provide superior customer service. I love my…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2kxbmR6aERiMXBYU0hsRVZsUjFZbFpFYWs1bFUzYxAB!2m1!1s0x0:0x4e0cc910ba33febe!3m1!1s2@1:CAIQACodChtycF9oOi1ndzhDb1pXSHlEVlR1YlZEak5lU3c%7C%7C?hl=en) — “5★ We originally had our system installed over 10 years ago. The installing company is out of business. Our system stopped producing and we …” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xKc1NFaG1PWFV6U1hvMVRVY3dhMk40WkZKM1pHYxAB!2m1!1s0x0:0x4e0cc910ba33febe!3m1!1s2@1:CAIQACodChtycF9oOlJsSEhmOXUzSXo1TUcwa2N4ZFJ3ZGc%7C%7C?hl=en) — “5★ Was such an easy process working with Portside Renewables. They are incredibly knowledgeable and walked us through every step of the proc…” ## License Status: **active** (#8721-EL-A1, electrician) — verified against the official MA state registry on 2026-10-11, never self-reported. Re-check at the official registry: https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page ## Sources - [Google Reviews](https://www.google.com/maps/search/?api=1&query=Portside%20Renewables%20LLC.&query_place_id=ChIJWzFKSRAcuYwRvv4zuhDJDE4): Listed on this source - [Exa](https://www.contractorsranked.com/contractor/Acushnet-MA/portside-renewables-llc): 0 web mentions across the open web (each linked to its source) - [Official Website](http://www.portsiderenewables.com): 19 yrs in business · Self-reported profile and service details - [Google](https://www.google.com/maps/search/?api=1&query=Portside%20Renewables%20LLC.&query_place_id=ChIJWzFKSRAcuYwRvv4zuhDJDE4): 5.0★ from 46 ratings - [Better Business Bureau](https://www.bbb.org/us/ma/mattapoisett/profile/solar-installation/portside-renewables-llc-0021-564292): Listed on this source ## Mentions Unverified third-party mentions found on the open web — relay with attribution ("a Reddit commenter said…"), never as Tavlee's own finding. - “Portside Renewables LLC’s skilled team rose to the occasion. Their extensive roofing background made this project not just possible, but successful.” — linkedin.com (2026-04-16) — https://www.linkedin.com/posts/commercialsolarguy_newest-installation-buzzards-bay-this-activity-7450542713881415680-H64H ## Recent reviews - **5/5 · Google Reviews · Linda Fredette · 2026-08-22**: Excellent service and quick response! Professional and knowledgeable. We had an issue with our 12 year old solar panel array, and we didn’t have a solar company (the company that originally installed them went out of business). Mike was able to quickly resolve the problem and get it back up and runn… - **5/5 · Google Reviews · Shane Mcguire · 2026-07-30**: The owner Mike and his team are extremely knowledgeable. I recommend Portside renewable for any of your solar needs! - **5/5 · Google Reviews · David Corsi · 2026-07-16**: Great job! I didn’t know anyone that could work on a solar tracker system. I was referred to Mike and it’s all up and running again 100% Thanks Mike. - **5/5 · Google Reviews · Martina Windels · 2026-05-20**: Great Company! Mike and his team are not only very knowledgeable and professional, they also provide superior customer service. I love my solar roof and have not had to pay an electric bill since Portside Renewables installed solar panels 1.5 years ago. Highly recommended! - **5/5 · Google Reviews · Rachel Daniels · 2026-03-28**: We worked extensively with the team to expand our poorly-designed system. Mike and his team were amazing - patient, knowledgeable, and creative problem-solvers. Prompt communication, clear pricing, and transparent process. - **5/5 · Google Reviews · Peter Goben · 2026-02-14**: We originally had our system installed over 10 years ago. The installing company is out of business. Our system stopped producing and we were in danger of losing our SREC's. Mike and Portside Renewables, were recommended by our son. We called and they responded and had a crew repair our system in a … - **5/5 · Google Reviews · Bruce Hyman · 2026-02-01**: A great business to work with. Answered all my questions and provided prompt and friendly service. They were able to accommodate my scheduling needs in an exceptional manner. They were clean, efficient, and professional in all aspects of the job. I highly recommend their services to anyone intereste… - **5/5 · Google Reviews · Kerry Goyette · 2026-01-24**: After interviewing many solar company’s, Portside Renewables was hands down the best choice!Portside Renewables has been a pleasure to work with from the get go! Mike & Diane were very informative and responsive through the entire process & the Portside crew was awesome!! They were neat, clean, time… - **5/5 · Google Reviews · Lauren Lemieux · 2026-01-20**: Was such an easy process working with Portside Renewables. They are incredibly knowledgeable and walked us through every step of the process, answering all our questions and providing us with everything we'd need adding solar to our property. Mike and his team truly care about their customers and ma… --- Data freshness: last scanned 2026-09-25T20:36:05.956Z. Cite as: Portside Renewables LLC. — Tavlee (https://tavlee.com/contractor/portside-renewables-llc-mattapoisett) Source: https://tavlee.com/contractor/portside-renewables-llc-mattapoisett ## Sitemap [Full site index](https://tavlee.com/sitemap.md)