25 kW gaseous-fueled standby generator with Brushless Wound-Field alternator and PowerBoost excitation. Sized for residential and light commercial backup on natural gas or propane.
The Kohler 25CCL is a 25-kilowatt gaseous standby generator and the entry point of Kohler's CCL series. It features a Brushless Wound-Field alternator with PowerBoost excitation, delivering strong motor-starting performance and sustained short-circuit support up to 300% rated current for 10 seconds. The unit runs on natural gas or LP propane and is EPA certified for stationary emergency use.
Sized for residential whole-house backup and small commercial applications, the 25CCL shares its enclosure platform with the 30CCL and 36CCL, keeping the footprint compact.
The CCL series is common in residential and light commercial installations across our territory. Service patterns are straightforward with the naturally aspirated gaseous engine and wound-field alternator design.
Tell us about the application — kW, voltage, application, install timeline — and we'll respond within one business day with budgetary pricing, lead time, and any sizing notes.
Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.
Estimate runtime on this tank
Fuel demand at 75% load
262,500 BTU/hr≈ 262.5 cf/min @ 1,000 BTU/cf
On utility natural gas the runtime is generally unlimited provided the supply line and meter can deliver this BTU/hr at the engine's required inlet pressure (typically 5–14" WC residential, up to 5 psi commercial). Confirm against the OEM's published fuel-pressure spec.
Service intervals
Manufacturer-recommended intervals for the Kohler 25CCL under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 200 hours or 12 months
Coolant change
Every 2000 hours
Air filter
Every 500 hours
Spark plugs
Every 500 hours
Major overhaul
≈ 6,000 hours
Load bank test
Every 12 months
Common failure modes
What we've seen fail on this platform. Use as a service-planning reference, not a diagnostic — actual failure modes depend heavily on duty cycle and maintenance history.
Component
Symptom
Typical hours
Severity
Spark plugs / ignition
Misfire under load, rough running, cylinder dropout codes
500+
minor
Fuel pressure regulator
Hard starting, unstable idle, gas pressure fault
6,000+
moderate
Battery (starting)
Slow crank, failed exercise, low voltage alarm
8,760+
minor
Frequently Asked Questions
What is the standby power rating of the Kohler 25CCL?
The 25CCL is rated 25 kW standby at 60 Hz. It is the smallest unit in Kohler's CCL gaseous series, sized for whole-house residential backup and small commercial loads.
Does the 25CCL run on natural gas or propane?
Both. Like all CCL-series units, the 25CCL supports natural gas and LP propane with field-selectable fuel switching.
What type of alternator does the 25CCL use?
The 25CCL uses a Brushless Wound-Field alternator. This design provides sustained short-circuit capability up to 300% of rated current for 10 seconds.
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