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Serving New Hampshire, Vermont & Massachusetts Since 1994

Generator Installation & Service Across New England

Powers Guaranteed Services proudly provides residential and commercial generator installation, maintenance, and repair throughout New Hampshire, Vermont, and Massachusetts. Headquartered in Swanzey, NH, our team of 70+ professionals serves homeowners and businesses across the region.

Powers Guaranteed service area map covering New Hampshire, Vermont, Massachusetts, and Connecticut

New Hampshire

Our home state and primary service area. From the Monadnock Region to the Seacoast, we cover communities across the Granite State with fast response times and local expertise, including the Portsmouth area.

Vermont

From Burlington to Brattleboro, we help Vermont homeowners and businesses stay powered through harsh winters and storm seasons with dependable generator systems.

Massachusetts

We install and service generators throughout all of Massachusetts, from Boston and Worcester to Springfield and the Berkshires.

Connecticut & Rhode Island

We provide generator maintenance and repair services for customers in Connecticut & Rhode Island. Please note that installation is not currently available in Connecticut & Rhode Island.

Don't See Your Town?

We serve many communities beyond those listed above. If you are located in New Hampshire, Vermont, or Massachusetts, give us a call at 800-853-7202 or request a free quote to find out if we cover your area.

Service Areas

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At a glance

Powers Guaranteed Services has completed 50 jobs in NH in October 2026.

The most recent job was on October 13, 2026.

Recent work covers Bristol, Nashua, Winchester, New London and Richmond.

Job Locations and Reviews

Troy, NH - Preformed semiannual preventative maintenance on this Generac Guardian 14kW
Scott R.
Scott R. Checked in
Preformed semiannual preventative maintenance on this Generac Guardian 14kW
Troy, NH 03465
Gilford, NH - Startup and remote monitoring installation on a Kohler 38RCL
Jeffrey O.
Jeffrey O. Checked in
Startup and remote monitoring installation on a Kohler 38RCL
Gilford, NH 03249
Jaffrey, NH - Preformed annual preventative maintenance on this Kohler 18RES
Scott R.
Scott R. Checked in
Preformed annual preventative maintenance on this Kohler 18RES
Jaffrey, NH 03452
Weare, NH - Preformed semiannual preventative maintenance on this Kohler 20RCA
Scott R.
Scott R. Checked in
Preformed semiannual preventative maintenance on this Kohler 20RCA
Weare, NH 03281
Bedford, NH - Preformed annual preventative maintenance on this Kohler 14RESAL
Scott R.
Scott R. Checked in
Preformed annual preventative maintenance on this Kohler 14RESAL
Bedford, NH 03110
Merrimack, NH - Preformed annual preventative maintenance on this Kohler 11RMY
Scott R.
Scott R. Checked in
Preformed annual preventative maintenance on this Kohler 11RMY
Merrimack, NH 03054
Scott R.
Scott R. Checked in
Preformed annual preventative maintenance on this Briggs and Stratton 20kW Fortress
Swanzey, NH 03446
Winchester, NH - Preformed annual preventative maintenance on this Kohler 14RCA
Scott R.
Scott R. Checked in
Preformed annual preventative maintenance on this Kohler 14RCA
Winchester, NH 03470
Winchester, NH - Troubleshoot for an exercise issues, on this Generac Guardian 18kW, got the issue resolved and now generator is ready to provide power
Scott R.
Scott R. Checked in
Troubleshoot for an exercise issues, on this Generac Guardian 18kW, got the issue resolved and now generator is ready to provide power
Winchester, NH 03470
Roxbury, NH - Preformed annual preventative maintenance on this Kohler 11RMY
Scott R.
Scott R. Checked in
Preformed annual preventative maintenance on this Kohler 11RMY
Roxbury, NH 03431
Nashua, NH - I perform the major service on this generator to prepare for the following year
Sean F.
Sean F. Checked in
I perform the major service on this generator to prepare for the following year
Nashua, NH 03064
Nashua, NH - Performed the major service on this Olympian 30kw generator
Sean F.
Sean F. Checked in
Performed the major service on this Olympian 30kw generator
Nashua, NH 03064
Bristol, NH - Routine two hour load bank on Kohler 38kw generator
Jeffrey O.
Jeffrey O. Checked in
Routine two hour load bank on Kohler 38kw generator
Bristol, NH 03222
New London, NH - Preformed semiannual preventative maintenance on this Kohler 48RCLA
Scott R.
Scott R. Checked in
Preformed semiannual preventative maintenance on this Kohler 48RCLA
New London, NH 03257
Nashua, NH - Performed a service for a brand new customer today and got the generator looking as new as it did out of the box
Sean F.
Sean F. Checked in
Performed a service for a brand new customer today and got the generator looking as new as it did out of the box
Nashua, NH 03063
Bristol, NH - Preformed a routine two hour load bank on a Kohler 20RESD
Jeffrey O.
Jeffrey O. Checked in
Preformed a routine two hour load bank on a Kohler 20RESD
Bristol, NH 03222
New London, NH - Preformed annual preventative maintenance on this Generac 16kW generator
Scott R.
Scott R. Checked in
Preformed annual preventative maintenance on this Generac 16kW generator
New London, NH 03257
Nashua, NH - Performed a Major service on this GE generator
Sean F.
Sean F. Checked in
Performed a Major service on this GE generator
Nashua, NH 03060
New London, NH - Preformed annual preventative maintenance on this Briggs and Stratton 12kW
Scott R.
Scott R. Checked in
Preformed annual preventative maintenance on this Briggs and Stratton 12kW
New London, NH 03257
Swanzey, NH - Completed a full inspection of this generator that is in a garage to keep it safe for the coming year
Sean F.
Sean F. Checked in
Completed a full inspection of this generator that is in a garage to keep it safe for the coming year
Swanzey, NH 03446
Lyndeborough, NH - Preformed annual preventative maintenance on this Kohler 12RES
Scott R.
Scott R. Checked in
Preformed annual preventative maintenance on this Kohler 12RES
Lyndeborough, NH 03082
Concord, NH - Troubleshoot on a Briggs and Stratton 7KW vertical for low oil pressure
Jeffrey O.
Jeffrey O. Checked in
Troubleshoot on a Briggs and Stratton 7KW vertical for low oil pressure
Concord, NH 03301
Lyndeborough, NH - Preformed annual preventative maintenance on this 7kW Generac Powerpact
Scott R.
Scott R. Checked in
Preformed annual preventative maintenance on this 7kW Generac Powerpact
Lyndeborough, NH 03082
Keene, NH - Performed a Major service on this Generac 5 Light Generator
Sean F.
Sean F. Checked in
Performed a Major service on this Generac 5 Light Generator
Keene, NH 03431
Preformed a major service on a Kohler 20RESD unit was a little dusty but cleaned up well and is ready for a outage
Preformed a major service on a Kohler 20RESD unit was a little dusty but cleaned up well and is ready for a outage
Jeffrey O.
Jeffrey O. Checked in
Preformed a major service on a Kohler 20RESD unit was a little dusty but cleaned up well and is ready for a outage
Bristol, NH 03222
Goffstown, NH - Troubleshoot on this Kohler 18RESL for a blank controller, found a dead battery with a failed battery charger, replaced both of them and now the generator is back online ready to provide power
Scott R.
Scott R. Checked in
Troubleshoot on this Kohler 18RESL for a blank controller, found a dead battery with a failed battery charger, replaced both of them and now the generator is back online ready to provide power
Goffstown, NH 03045
Peterborough, NH - Completed the yearly maintenance on this Kohler 26RCA
Sean F.
Sean F. Checked in
Completed the yearly maintenance on this Kohler 26RCA
Peterborough, NH 03458
Wilton, NH - Preformed annual preventative maintenance on this Briggs and Stratton 7kW
Scott R.
Scott R. Checked in
Preformed annual preventative maintenance on this Briggs and Stratton 7kW
Wilton, NH 03086
Bristol, NH - Major service on a Kohler 38RCLB propane generator
Jeffrey O.
Jeffrey O. Checked in
Major service on a Kohler 38RCLB propane generator
Bristol, NH 03222
Woodstock, VT - Preformed annual preventative maintenance on this 15kW Generac
Scott R.
Scott R. Checked in
Preformed annual preventative maintenance on this 15kW Generac
Woodstock, VT 05071
Weathersfield, VT - Performed annual preventative maintenance on this 20kW Briggs and Stratton
Scott R.
Scott R. Checked in
Performed annual preventative maintenance on this 20kW Briggs and Stratton
Weathersfield, VT 05151
Rye, NH - Performed the yearly maintenance on this Winco generator to get it prepared for the winter
Sean F.
Sean F. Checked in
Performed the yearly maintenance on this Winco generator to get it prepared for the winter
Rye, NH 03870
Cavendish, VT - Performed semiannual preventative maintenance on this Kohler 30RCL
Scott R.
Scott R. Checked in
Performed semiannual preventative maintenance on this Kohler 30RCL
Cavendish, VT 05153
North Hampton, NH - Performed the requested 6 month check up on this Sentry Pro generator
Sean F.
Sean F. Checked in
Performed the requested 6 month check up on this Sentry Pro generator
North Hampton, NH 03862
Killington, VT - Performed semiannual preventative maintenance on this Kohler 20RESA
Scott R.
Scott R. Checked in
Performed semiannual preventative maintenance on this Kohler 20RESA
Killington, VT 05751
Rye, NH - Performed the Major service on this Kohler for the winter ahead
Sean F.
Sean F. Checked in
Performed the Major service on this Kohler for the winter ahead
Rye, NH 03870
Pittsford, VT - Performed annual preventative maintenance on this Kohler 14RESAL
Scott R.
Scott R. Checked in
Performed annual preventative maintenance on this Kohler 14RESAL
Pittsford, VT 05763
Chesterfield, NH - Performed the yearly maintenance on this brand new Kohler 26RCA to get it ready for the winter
Sean F.
Sean F. Checked in
Performed the yearly maintenance on this brand new Kohler 26RCA to get it ready for the winter
Chesterfield, NH 03443
Chesterfield, NH - Performed annual preventative maintenance on this Generac Guardian 10kW
Scott R.
Scott R. Checked in
Performed annual preventative maintenance on this Generac Guardian 10kW
Chesterfield, NH 03466
Gilsum, NH - Maintenance for the year ahead was completed
Sean F.
Sean F. Checked in
Maintenance for the year ahead was completed
Gilsum, NH 03448
Londonderry, VT - Performed a major service on unit along with a repair got the unit online and operating as it should be
Jeffrey O.
Jeffrey O. Checked in
Performed a major service on unit along with a repair got the unit online and operating as it should be
Londonderry, VT 05148
Nelson, NH - Performed annual preventative maintenance on this Generac Guardian
Scott R.
Scott R. Checked in
Performed annual preventative maintenance on this Generac Guardian
Nelson, NH 03457
Richmond, NH - Performed a minor check up on a generator for the winter ahead
Sean F.
Sean F. Checked in
Performed a minor check up on a generator for the winter ahead
Richmond, NH 03470
Richmond, NH - Performed a Major service on this Briggs and Stratton
Sean F.
Sean F. Checked in
Performed a Major service on this Briggs and Stratton
Richmond, NH 03470
Richmond, NH - Performed a Major service on this Kohler and replaced the battery
Sean F.
Sean F. Checked in
Performed a Major service on this Kohler and replaced the battery
Richmond, NH 03470
Rindge, NH - Performed annual preventative maintenance on this Generac Guardian 20kW
Scott R.
Scott R. Checked in
Performed annual preventative maintenance on this Generac Guardian 20kW
Rindge, NH 03461
Fuel line replacement on an aging Generac 15KW ECOGEN. Old lines were dry rotted and cracking. New lines are installed and unit is online and ready for the next outage..
Fuel line replacement on an aging Generac 15KW ECOGEN. Old lines were dry rotted and cracking. New lines are installed and unit is online and ready for the next outage..
Jeffrey O.
Jeffrey O. Checked in
Fuel line replacement on an aging Generac 15KW ECOGEN. Old lines were dry rotted and cracking. New lines are installed and unit is online and ready for the next outage..
Dublin, NH 03444
Jaffrey, NH - Troubleshoot for rough running conditions on a Kohler 10 RESV. Installed new spark plugs to resolve the issue.
Jeffrey O.
Jeffrey O. Checked in
Troubleshoot for rough running conditions on a Kohler 10 RESV. Installed new spark plugs to resolve the issue.
Jaffrey, NH 03452
Winchester, NH - Performed annual preventative maintenance on this 10kW Briggs and Stratton Fortress
Scott R.
Scott R. Checked in
Performed annual preventative maintenance on this 10kW Briggs and Stratton Fortress
Winchester, NH 03470
Winchester, NH - Performed annual preventative maintenance on this 10kW Briggs and Stratton Fortress
Scott R.
Scott R. Checked in
Performed annual preventative maintenance on this 10kW Briggs and Stratton Fortress
Winchester, NH 03470
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