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Generator Supercenter of Maine installs home standby generators. Its website describes turnkey installation of systems from 18kW to 60kW for residential and commercial power demands. On HomeAdvisor, a customer said a Generac inline generator was up and running in a couple of hours. A customer said Sam coordinated everything, including the inspections. A customer who needed electrical work said Jason Grant showed up on time for the estimate and listened. A customer said the installation crew left the area spotless when the Generac install was complete. On Google the company shows 4.8 stars from 62 ratings. A 2025 customer said five workers installed a Generac generator, moving rocks and connecting it to the propane. A 2025 customer said the company secured all permits and inspections. A 2022 customer said the company contacted the gas company to schedule replacement of an old meter. A 2022 customer said the company diagnosed and repaired a generator so it starts and runs well. A HomeAdvisor customer gave two stars, saying the manager was rude, the electricians left the yard a mess and tracked mud through the house, and they had to come back twice to fix a generator that was improperly installed. A New Hampshire electrician licence, 0499C, held by Sanford Enterprises LLC doing business as Generator Supercenter of NH, is active on the state registry.
Very efficient and friendly. Did a great job in terrible weather. Cleaned up after themselves and made sure I was comfortable with everything. Highly recommend
Manager was extremely rude, electricians did very sloppy work, left yard a mess and trash left in house as well as tracking mud through my house. Very unprofessional. Had to come back twice to fix the generator after improperly installed.
Excellent service! Highly recommend!! I needed electrical work done quickly and professionally. Jason was on it! He showed up on-time for the estimate and listened to me. His crew was knowledgeable, friendly and did an excellent job. It’s refreshing to be able to trust that the work will get done correctly and safely. Thanks, Jason Grant, and Generator Supercenter of Maine!
Great service/install, super efficient, clean and smart team. Also they beat competitor pricing significantly. Very happy with Generator SuperCenter of Maine!
Right from the first meeting with Bjorn S, we were comfortable with GSM. Bjorn was professional, helpful, without any sales pressure. Paperwork was easy and understandable, Sam was prompt and patient with questions and follow up. Installation crew was careful and efficient, everything went smooth. Very satisfied and would highly recommend this company.
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1 change recorded — last scanned Oct 4, 2026.
Typical Maine range for this kind of work, from regional averages — not a quote from Generator Supercenter of Maine. Use it to sanity-check bids, then get the real number in writing.
Standard receptacle swaps — a new dedicated circuit is a bigger job ($350–$750).
Flush mounts, pendants, chandeliers — hung on existing boxes.
Estimated range
$500 – $1,050
Typical electrical project around $780
Day-of emergency electrical calls3.9
Faulty wiring brought up to code4.3
Same-week visit after a first email4.3
33 years in businessNot yet rated
Power outage call solved by Matt3.2
42 years in businessNot yet rated
