Winco PSS12H – Standby Generator


Bigger isn’t always better. The Winco PSS12H emergency standby generator is an industrial grade 12kW generator. The three chamber housing design keeps the generator cool while allowing for the smallest footprint in its class. The industrial Honda GX690 engine provides smooth and consistent power that is capable of running essential loads like sump pumps, well pumps, furnaces, refrigerators, TV’s, lights and computers. Since this generator is sized to keep the basics running you will also be able to save money on fuel and maintenance.


Price Includes Freight to a Business Address – The customer is responsible for unloading merchandise upon delivery.


Printable Brochures:

PSS12H Packaged Standby System

ASCO 185 Series Transfer Switch


Asco 185 Series 100 Amp ATS

ASCO 185 Series, 100 Amp, 2-Wire Start, Automatic Transfer Switch

Transfer Switch Enclosure

NEMA 1 Enclosure is Standard – NEMA 3R provides additional weather protection for outdoor use.

Vapor Fuel Filter

Engine Oil Heater

Battery Heater


Group 26 500 CCA

Maintenance Kit 16200-006

Maintenance Kit Includes: Air Filter, Spark Plug, Oil & Oil Filter. 6 Lbs




Honda GX690 Engine - The Honda GX690 is better than ever.  Including improve adaptability, quiet operation, and improved fuel efficiency.

Sure Flow Cooling System - The three cooling intakes provide exceptional air flow and reduced heat soak.

DSE 3110 Digital Controller - Provides detailed operating and diagnostic information through its digital display.

Prime Power Ready - This unit is appropriate for either Emergency Standby or Prime Power applications like powering remote water pumps.

Batter Charger - A Guest 3-Stage battery charger included.

100% Load Tested - No statistical sampling here.  Winco load tests every generator before it leaves their facility.

Galvanealed Steel Weather Enclosure - Industrial galvanealed steel housing with powder-coat paint to withstand the elements.

PSS 8 Generator Specificaitons

Voltage Regulation+/-5%
Total Harmonic Distortion<5%
Temperature Rise125°/40° C
Type2 Pole Rotating Field
Generator Speed3600 RPM
Voltage ControlCapacitor
Rotor2/3 Pitch
Windings100% Copper
Load Acceptance100% Rating/Single Step
Sealed Ball Bearings1
Wave Distortion<1.5%
Telephone Interference<2%
InsulationClass H
Generator Warranty (1)2 Years


Speed3600 rpm
Displacement668 CC/OHV
LubricationForced w/ Spin-on Filter
Regulation+/- 1.8 hz Steady State
ExhaustCritical Grade, Glass-Pack
Low Oil ProtectionStandard
High Oil Temp ProtectionStandard
Recommended Oil10W-30
Oil Capacity1.8 Qts
Engine Warranty3 Yrs


Motor Starting Code (Code G)4 HP
Prime ApplicationsYes
Structural Clearance18 Inches
Carb/EPA ApprovedYes
CSA ApprovedYes
UL2200 ListedYes
Winco Warranty1 Yr / 1000 Hrs



2.1 Gal/Hr
190 Ft³/Hr

194,000 BTU/Hr
190,000 BTU/Hr
60°F (16°C)
32°F (0°C)
0°F (-18°C)
-20°F (-29°C)

150 Gal
250 Gal
500 Gal
1000 Gal
Up to 25'
25' To 100'
Over 100'

3/4" Pipe
1" Pipe
Use a 2 Regulator System
INLET PRESSURE4-6 Oz7"-11"Water Column




Power Specifications

LP Gas:

  • Output - 120/240V 1-PH
  • Watts - 12,000
  • KVA - 12
  • Amps - 50 (Unity (1.0) Power Factor
  • Circuit Breaker - 50 Amps

Natural Gas:

  • Output - 120/240V 1-PH
  • Watts - 10,000
  • KVA - 10
  • Amps - 41 (Unity (1.0) Power Factor
  • Circuit Breaker - 50 Amps

Optional Accessories

Asco 185 Series Auto Transfer Switch - 100 Amp - The ASCO 185 Series automatic transfer switch (ATS) are 2-wire control switches that are compatible with all 2-wire start systems from all manufacturers. The switch monitors incoming utility power. When the utility power fails it starts the generator and transfer the emergency load onto the generator. After the utility power is restored it will transfer the load back to the utility source, cool down the generator and then return to a standby mode. The ATS has an exercise circuit that tests the generator system every week. The automatic test feature can be set under load or under no load.

Note: More transfer switches can be found by searching "Transfer Switches"

Engine Oil Heater -  order to ensure quick starting in the coldest environments WINCO has designed an engine heater kit that is field installed to keep your engine block warm. The kit includes a thermostat that engages the heater at 50 degrees F (internal cabinet temperature) and shuts off at 60 degrees F. The heating probe is produced by Kim Hot Start and is inserted into the oil pan replacing the second drain plug. The kit is powered from the factory installed duplex receptacle. To allow for the battery heater an additional NEMA 5-15 receptacle is included in the kit.

Vapor Fuel Filter -  If contaminants enter the fuel system of generator you will experience reduced power output and decreased reliability.  This device provides a layer of protection to prevent contamination that can enter your fuel system from a variety of sources.  5 Lbs.

Battery - Group 26 550 CCA

Battery Heater - Keeps battery warm for maximum power output at start-up. 5 Lbs.

Two Wire Start Kit - Every automatic standby generator requires safety controls to prevent damage to the equipment. A crank limiter prevents the generator from damaging the start mechanism if the engine won't start. Safety shutdowns like over speed and under speed also detect a problem and shut down the generator to prevent damage. The engine control also opens and closes the fuel solenoid to control fuel flow.

Maintenance Kit - Your generator requires regular maintenance. Our kits provide all of the necessary products to ensure your generator is ready when you need it most.

Additional information

Weight 512 lbs
Dimensions 48 × 38 × 43 in

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