7 min readUpdated June 2026
Generator Sizing & Transfer Switch Guide
New England storms mean generators are one of the most-requested electrical add-ons in MA. The decision comes down to how much of your house you want to keep running and how hands-off you want it to be during an outage.
What's inside
- Interlock kit + portable generator vs. whole-home standby: real trade-offs
- How to size a generator without over-buying (most homeowners buy too much)
- Natural gas vs. LP vs. gasoline — MA fuel supply reality
- Transfer switch types: manual, interlock, automatic
- MA permit + gas fitter coordination for standby installs
- Realistic installed prices: interlock, ATS, and full standby
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