M.J. Carr Electrical Services, LLC
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About M.J. Carr Electrical Services, LLC
M.J. Carr Electrical Services, LLC delivers electrical solutions across Marshfield and the broader South Shore region. The company maintains a perfect 5.0-star rating drawn from 174 client reviews, reflecting consistent service quality in both residential and commercial settings. Their service menu spans the full range from fixture installations to complete electrical service upgrades, with particular depth in generator systems and EV charging infrastructure.
The company holds authorization as a Lutron installer, positioning them uniquely for advanced lighting control projects in the region. Their service offerings include specialized work for hot tubs and RV electrical setups, areas that require specific expertise beyond standard residential electrical contracts. They advertise free estimates, providing transparency for homeowners evaluating larger projects.
Customer reviews highlight specific technicians including Tim and Pat, who handled oversized lighting installations with thorough cleanup. Another reviewer detailed a 200-amp service upgrade including underground service lateral, coordination with the utility provider, and installation of a generator interlock for selective circuit backup during outages. The team communicated progress updates throughout the project and coordinated municipal inspection.
What Customers Say
All 174 reviews carry 5-star ratings, with multiple reviewers specifically naming technicians Tim, Pat, and Matt while describing generator coordination, furnace repairs during extreme weather, and service upgrades.
Working Hours
| SundayToday | Closed |
| Monday | 7:30 AM–5:30 PM |
| Tuesday | 7:30 AM–5:30 PM |
| Wednesday | 7:30 AM–5:30 PM |
| Thursday | 7:30 AM–5:30 PM |
| Friday | 7:30 AM–5:30 PM |
| Saturday | 7:30 AM–12 PM |
Services
Electrical Service Upgrades
Panel upgrades to 200-amp service including underground service lateral coordination with utilities and municipal inspection.
Generator Installation
Complete generator setup with fire alarm integration, startup instructions, and interlock installation for selective circuit backup.
EV & Tesla Charging Installation
Electric vehicle charger and Tesla Wall Connector installation for residential charging needs.
Lighting Installation
Recessed lighting, decorative lighting, and oversized fixture installation with post-job cleanup.
Hot Tub & RV Electrical
Specialized electrical setup for hot tubs and RV outlets including dedicated circuits and proper grounding.
Ceiling Fan Services
Ceiling fan wiring and repair covering new installations and existing unit diagnostics.
Surge Protection & GFCI
Whole-home surge protector installation and GFCI outlet upgrades for kitchen and bathroom safety compliance.