Generator Service

We are the premier service and repair provider for generators in Wisconsin & Upper Michigan. All of our generator service technicians are factory-certified and equipped with state-of-the-art, four-wheel-drive diesel service vehicles that are capable of reaching almost any customer location in any weather.

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Our field factory-certified technicians are here for your generator service, inspection and repair needs throughout Wisconsin & Upper Michigan. Services offered include:

  • Scheduled Maintenance Plans (monthly, quarterly, annually)
  • Emergency Service
  • Loadbank Testing
  • Fuel Polishing
  • Annual Inspections

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The Best Techs in the Business

Our factory-certified technicians have rigorous training standards to handle any level of maintenance & repair needs.

Fast and Efficient Response Times

Service vehicles are equipped with extensive parts inventory and wireless connects for quick dispatch & field repairs.

All Makes & Models Serviced

We work on every make, model and type of generator or standby power system.

Emergency & After-Hours

Just call 800-634-9010 and we’ll get you taken care of.


  • Only factory-trained technicians work on your equipment 
  • At your location within 1 business day after your call is registered with dispatch
  • You will receive a written estimate within 48 hours
  • We will only perform work after receiving your authorization
  • All minor repairs will be made within 5 business days of your approval (subject to parts availability)
  • All repairs will be covered by our 6 month Parts & Service guarantee
  • All repair work performed by Wolter technicians meet your total satisfaction


Generator Audit

An on-site generator audit allows customers to be proactive around the service, maintenance, and replacement of existing generators. 

Audits Include:

  • Site visit to the generator(s)
  • Assessing the condition of the generator(s)
  • Reporting with findings and recommendations

Scheduled Maintenance

Reduce downtime and lower maintenance costs 

  • Select monthly, quarterly or annual plans

Extended Warranty 

Protect your equipment after the manufacturer’s warranty expires with extended protection plans.


Repairs are made on a first come, first served basis. At this time, generator service and repair area includes Wisconsin and Upper Michigan only; we're sorry for any inconvenience. For emergency, weekend or after hour service please call 800-634-9010.

For emergency service please call 800-634-9010.
Subject to technician availability.
Service area includes Wisconsin and Upper Michigan only.

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