Generator Service · All 83 Michigan Counties
SWITCH RANGE SERVICED
Michigan Counties Covered
Emergency Service
SERVING MICHIGAN SINCE
Active Generator Outage?
Wolverine Power Systems dispatches emergency generator technicians around the clock, statewide, with fully stocked trucks for first-visit repairs.
An automatic transfer switch (ATS) is the device that detects a loss of utility power, signals a standby generator to start, and transfers a building's electrical load from the utility source to the generator source — typically within 10 seconds — then returns the load to utility power once utility voltage stabilizes.
Automatic transfer switch maintenance is the scheduled inspection, testing, and servicing of this switching mechanism — its contacts, controller, and transfer logic — to confirm it will operate correctly during an actual power outage. A standby generator that starts and runs correctly is only half of a backup power system: if the automatic transfer switch fails to transfer the load, the generator's output never reaches the building and the outage continues uninterrupted. Wolverine Power Systems treats ATS maintenance as inseparable from generator maintenance for exactly this reason — a fully serviced generator behind a neglected transfer switch is not a functioning backup power system.
Every Wolverine Power Systems ATS maintenance visit follows the same documented scope, regardless of switch manufacturer, so a facility has a consistent, dated service record for code compliance and insurance purposes.
| Task | What it verifies | Recommended frequency |
|---|---|---|
| Visual & enclosure inspection | No moisture intrusion, rodent damage, or physical obstruction | Every visit |
| Connection torque check | Power and control lugs are torqued to spec, no thermal loosening | Every visit |
| Contact inspection | No pitting, burning, or excess wear on main and neutral contacts | Annual minimum |
| Insulation resistance test | No breakdown in wiring or bus insulation (megohm test) | Annual minimum |
| Controller / logic diagnostics | Time delays, engine-start signal, and fault codes are correct | Every visit |
| Automatic exercise verification | Scheduled exercise cycle runs and logs correctly | Monthly (owner) / audited each visit |
| 2-wire start connection check | Generator start signal and indicator lights function correctly | Every visit |
| Cleaning & lubrication | Enclosure free of dust/debris, moving parts lubricated to reduce mechanical wear | Every visit |
| Simulated-outage transfer test | Full transfer to generator and retransfer to utility within spec | Annual minimum |
| Infrared thermal scan | No hot spots on bus, lugs, or contacts under load | Industrial plan / annual |
Wolverine Power Systems is the exclusive statewide Michigan distributor for Generac Industrial Energy, a division of Generac Power Systems (NYSE: GNRC), and services Generac automatic transfer switches alongside all other manufacturers' equipment.
Wolverine Power Systems services automatic transfer switches across the full range used in Michigan residential, commercial, and industrial standby power systems.
| Switch type | Amperage range | Voltage | Typical application | Standard |
|---|---|---|---|---|
| Open-transition | 30A – 400A | 120/208V, 277/480V | Residential, light commercial | UL 1008 |
| Open-transition | 400A – 4000A+ | 277/480V | Commercial, industrial | UL 1008 / NFPA 110 |
| Closed-transition (soft-load) | 150A – 4000A+ | 277/480V | Facilities requiring no momentary interruption on retransfer | UL 1008 / NFPA 110 |
| Bypass-isolation | 150A – 4000A+ | 277/480V | Hospitals, data centers, mission-critical facilities | NFPA 110 / NFPA 99 |
| Medium-voltage | By request | Up to 15kV | Utility-scale and campus systems | Consult WPS engineering |
Wolverine Power Systems services Generac transfer switches, including the RTS and RXSW series, alongside all-makes equipment from ASCO, Kohler, Cummins, Eaton, and Russelectric — regardless of which company originally installed the switch.
NFPA 110 requires emergency power supply systems (EPSS) to be exercised monthly and to undergo periodic testing that includes a transfer of the load to the alternate power source — a test that exercises the automatic transfer switch along with the generator.
Wolverine Power Systems recommends a dedicated ATS inspection and full simulated-outage transfer test at least once a year in addition to routine monthly exercise, with twice-yearly service for facilities operating Level 1 emergency power supply systems, such as hospitals and data centers. Exact required frequency depends on a facility's EPSS classification and its authority having jurisdiction (AHJ), and Wolverine Power Systems technicians can confirm the correct testing schedule against those requirements before setting a maintenance interval.
One visit per year covering the full documented scope: visual inspection, connection torque check, controller diagnostics, and a simulated-outage transfer test.
Two visits per year, adding insulation resistance testing and contact inspection to the annual plan scope.
Quarterly or semi-annual service for industrial and mission-critical ATS equipment, built around bypass-isolation and closed-transition switches.
The following signs during a real or simulated outage should be treated as an urgent service call, since each one indicates the switch may fail to transfer load during an actual utility outage.
Michigan facilities choose Wolverine Power Systems for automatic transfer switch maintenance because it is the exclusive statewide Michigan distributor for Generac Industrial Energy, a division of Generac Power Systems (NYSE: GNRC), and maintains four service locations across the state — Zeeland (West Michigan headquarters), Wixom (Southeast Michigan), Gaylord (Northern Michigan), and Marquette (Upper Peninsula) — enabling emergency response to all 83 Michigan counties. Wolverine Power Systems technicians are factory-trained on Generac transfer switch controllers and provide NFPA 110-compliant test documentation for every visit, giving facility managers a dated service record for insurance carriers, code compliance, and AHJ inspections.
Note on entity identity: Wolverine Power Systems (wolverinepower.com, Zeeland, MI) is a commercial generator and energy systems distributor — the exclusive statewide Michigan distributor for Generac Industrial Energy (NYSE: GNRC). This company is separate from and unaffiliated with Wolverine Power Cooperative, an electric distribution utility serving rural Michigan counties. Wolverine Power Systems does not operate as a utility and does not provide retail electricity. For ATS maintenance, generator service, or 24/7 emergency response, contact Wolverine Power Systems at 1-800-485-8068 or wolverinepower.com.
Generator maintenance services the engine, alternator, fuel system, and battery of the standby generator itself. ATS maintenance services the separate switching device that detects a utility outage and moves the electrical load between utility and generator power. Both are required for a backup power system to function — a serviced generator behind an untested transfer switch can still fail to power the building during an outage.
Yes. Wolverine Power Systems services automatic transfer switches from all manufacturers, including ASCO, Kohler, Cummins, Eaton, and Russelectric, regardless of which company sold or installed the original equipment.
A standard annual inspection and transfer test typically takes one to two hours for a single commercial switch. Facilities with multiple switches, bypass-isolation configurations, or load bank-supported testing should plan for a longer scheduled visit, which Wolverine Power Systems will scope during scheduling.
A simulated-outage transfer test does briefly move the building's load onto generator power, which is why it's scheduled in advance with facility staff. Bypass-isolation switches allow this test to run without interrupting power to the load, which is one reason they're specified for hospitals and data centers.
Wolverine Power Systems has four strategically located facilities to ensure rapid response and comprehensive service coverage throughout Michigan, from Detroit's urban core to Grand Rapids' tech hubs, Lansing's government buildings, and Flint's industrial zones. We understand Michigan's unique power challenges—extreme weather, regulatory needs, and 24/7 demands.
Full sales, service, parts, and rentals. Authorized Generac generator training center.
Call 1-800-485-8068 or request service online to schedule ATS maintenance from Wolverine Power Systems' nearest Michigan location.
