M.J. Carr Electrical Services, LLC

M.J. Carr Electrical Services is a Marshfield electrical shop with 174 Google ratings averaging 5 stars, and its customers keep naming the crew: Tim, Pat, Jeff, Sawyer, Harry. The company's site says it was founded by, and is owned and operated by, Master Electrician Matthew Carr, with over 20 years of experience, and describes residential and commercial repair, panel and generator work, lighting and EV charger installation across the South Shore. Matthew J Carr holds Massachusetts electrician licence 21260-EL-A, active on the state registry, and the company holds an A grade from the BBB. Service upgrades come up often. In a May 2025 review, a customer described a relocation and upgrade to 200amp service with the lines buried, coordination with the town for the inspection and with National Grid for the cutover, plus a generator interlock, a floor receptacle and an RV outlet. A March 2025 reviewer said the electricians who upgraded the service to 200 amp were persistent about getting the proper permits and inspections. In a February 2025 review, a Hingham customer said MJ Carr upgraded the house from 100 to 200 amps and installed an EV charger on one visit, then installed and wired a floodlight camera on another. Recent reviews describe quick help. A January 2026 customer said the crew got a furnace running on short notice at the tail end of a huge snow storm, and another January 2026 reviewer said Matt sent a full list of instructions for starting a generator. In an April 2025 review, a customer who pushed the appointment back over a delay of about 2 months said the team stayed accommodating and pulled the permit. On price, a February 2025 reviewer wrote "Yes they are expensive, but it's worth the no worry", while an August 2025 review cites fair pricing.