M.J. Carr Electrical Services, LLC

M.J. Carr Electrical Services works out of Marshfield, and the specifics in its reviews cluster around two kinds of jobs: panel upgrades and generator hookups. Reviewers describe 100-to-200-amp service upgrades handled start to finish -- permits pulled, town inspections coordinated, the National Grid cutover scheduled -- rather than a quick swap. On the generator side, a 2026 review says the crew 'sent over a full list of instructions' on starting a generator during a storm, while another describes Tim installing a manual transfer switch for a portable unit. In a 2022 review, a customer wrote the crew 'took the time to walk me through' a new generator, then came back the following year to install recessed lighting and add outdoor hookups. The company also wires EV chargers -- one customer had a charger and a floodlight camera installed in the same visit, another paired a car charger with circuit-breaker work -- and runs dedicated circuits for larger appliances. When something's actually wrong, the diagnostic work reads as careful rather than rushed: in a 2024 review, technician Sawyer traced a 'perplexing' circuit-breaker complaint through several possible causes before ruling the breaker itself fine, and on an earlier visit the same technician arrived with two solutions already worked out. Google shows 174 ratings averaging five stars, and the Better Business Bureau grades the company A. The reviews run from 2021 through this year, with four more landing in just the past six months and none of them negative. In a 2023 review, one customer wrote they'd been using the company 'for many years' and the job was 'always done right', and a handful of others -- Tim, Jeff, Sawyer, Jen in the office -- turn up across multiple projects. The one thing worth flagging: in a 2025 review, a customer called the company 'expensive, but... worth the no worry' -- nobody else raised cost as an issue, so it reads as one person's take on where they sit in the market rather than a pattern. For a panel upgrade, a generator hookup, or an EV charger install, this is a company with a long paper trail of doing exactly that kind of work cleanly; worth pinning down the estimate up front given that one note on price.