Kohler 12RESV-QS8 (12kW) product details and specifications:

Generator Ratings 

• Model: 12RESV 

• Voltage: 120/240 

• Phase: 1 

• Frequency: 60 Hz 

• Alternator: 2F4 

• Natural Gas Standby Rating: 12 kW/kVA, 50 Amps 

• LPG Standby Rating: 12 kW/kVA, 50 Amps 

Alternator Specifications 

• Manufacturer: Kohler 

• Output reconnectable: 120/240 

• Type: 2-Pole, Rotating Field 

• Leads, quantity: 4 

• Voltage regulator: Digital 

• Insulation material: Class H 

• Temperature rise: Class H 

• Bearing: 1, Sealed Ball 

• Coupling: Direct 

• Amortisseur windings: Full 

• Voltage regulation, no-load to full-load (RMS): ±1.0% 

• One-step load acceptance: 100% of Rating 

• Peak motor starting kVA (240V, 2F4, 60Hz): 20.3 

Engine Specifications 

• Manufacturer: Kohler 

• Engine model, type: KT725 

• Cylinder arrangement: V-2 

• Displacement: 725 cm³ (44 cu. in.) 

• Bore and stroke: 83 x 67 mm (3.3 x 2.6 in.) 

• Compression ratio: 9.0:1 

• Main bearings: 2, Parent Material 

• Rated RPM (60 Hz): 3600 

• Max. engine power, LPG (60 Hz): 16 kW (21.4 HP) 

• Max. engine power, Natural Gas (60 Hz): 13.4 kW (18 HP) 

• Cylinder head material: Aluminum 

• Valve material: Steel/Stellite 

• Piston type and material: Aluminum Alloy 

• Crankshaft material: Heat Treated, Ductile Iron 

• Governor type: Electronic 

• Frequency regulation, no load to full load: Isochronous 

• Frequency regulation, steady state: 1.0% 

• Air cleaner type: Dry 

Exhaust System 

• Exhaust temperature exiting enclosure at rated kW, dry: 106°C (224°F) 

Engine Electrical System 

• Ignition system: Electronic, Capacitive Discharge 

• Starter motor rated voltage (DC): 12 

• Battery ground: Negative 

• Battery voltage (DC): 12 

• Battery quantity: 1 

• Recommended cold cranking amps (CCA) at -18°C (0°F): 500 

• Group size: 51 

Lubrication System 

• Type: Full Pressure 

• Oil capacity (with filter): 1.9 L (2.0 qt.) 

• Oil filter: 1, Cartridge 

Fuel Requirements 

• Fuel types: Natural Gas or LPG 

• Fuel supply inlet: 1/2 NPT 

• Natural gas supply pressure: 0.87–2.7 kPa (3.5–11 in. H2O) 

• LP supply pressure: 1.7–2.7 kPa (7–11 in. H2O) 

• Minimum gas pipe size (8 ft, Natural Gas/LPG): 3/4 in. NPT 

Fuel Consumption (12RESV) 

• Natural Gas — 100% load: 6.1 m³/hr (216 cfh) 

• Natural Gas — 75% load: 4.5 m³/hr (160 cfh) 

• Natural Gas — 50% load: 3.6 m³/hr (128 cfh) 

• Natural Gas — 25% load: 2.8 m³/hr (99 cfh) 

• Natural Gas — exercise: 2.1 m³/hr (74 cfh) 

• LPG — 100% load: 2.9 m³/hr (103 cfh) 

• LPG — 75% load: 2.2 m³/hr (76 cfh) 

• LPG — 50% load: 1.6 m³/hr (57 cfh) 

• LPG — 25% load: 1.2 m³/hr (42 cfh) 

• LPG — exercise: 0.8 m³/hr (30 cfh) 

Sound Data 

• 8-point logarithmic average, weekly exercise: 67 dB(A) 

• 8-point logarithmic average, full-speed diagnostics/normal operation: 71 dB(A) 

• Lowest point sound level, weekly exercise: 64 dB(A) 

• Lowest point sound level, full-speed operation: 69 dB(A) 

• Measured at 7 meters with no load 

Controller 

• Controller: RDC2 

• Controller voltage: 240 V 

• Controller frequency: 60.0 Hz 

• Two-line, 16-character backlit LCD display 

• Digital isochronous governor 

• Digital voltage regulation: ±1.0% RMS no-load to full-load 

• Built-in 2.5 amp battery charger 

• Integral Ethernet connector for Kohler OnCue® Plus 

• Front-access mini USB connector 

Standard Features 

• Battery cables 

• Critical silencer 

• EPA certified fuel system 

• Field-connection terminal block 

• Fuel solenoid valve and secondary regulator 

• Line circuit breaker: 60 amps (12RESV) 

• Multi-fuel system, LPG/natural gas, field-convertible 

• Oil drain extension with shutoff valve 

• OnCue® Plus Generator Management System 

• RDC2 generator set/ATS controller 

• Rodent-resistant construction 

• Sound enclosure with sound-deadening, flame-retardant foam per UL 94, class HF-1 

• 5-year limited warranty 

Certifications and Standards 

• Meets U.S. EPA 40 CFR 60 stationary source emission standards (LPG and natural gas) 

• UL 2200 listed (60 Hz model) 

• Accepted by the Massachusetts Board of Registration of Plumbers and Gas Fitters 

• Meets 181 mph wind rating 

• CSA Approval (60 Hz only) 

Dimensions and Weight 

• Overall size (L x W x H): 30.6 x 28 x 32.4 in. 

• Shipping weight (12RESV): 433 lb. 

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