Generac · Portable generator · GP5500E COsense 50ST
GP5500E COsense 50ST delivers up to 5,500 running watts and 6,875 starting watts from a portable gasoline system.
Infographic gallery
5,500W rated output
The comparison uses Generac’s published rated and peak, surge, or maximum output figures.
Energy source
Gasoline
Published runtime guidance
10.5 hours at 50% load on the primary listed fuel
172 lb
Listed weight
30 × 27 × 25 in
Dimensions
Charging or integration
Fueling and starting per Generac instructions; manual transfer equipment sold separately
Backup transfer
Not an automatic standby system; approved manual transfer equipment is required for home connection
Noise
No official dBA figure listed on the model page
Official product gallery
The current official image set for GP5500E COsense 50ST includes product views, connection diagrams, feature explanations, and compatible system configurations where Generac publishes them.
Complete specifications
These pages retain Generac's model-specific output, charging, battery, port, continuity, dimensions, environmental, engine, fuel, app-control, and warranty fields where published.
System capability
GP5500E COsense 50ST delivers up to 5,500 running watts and 6,875 starting watts from a portable gasoline system.
Power delivery
GP Series 5500-watt COSENSE® 50ST Portable Generator.
Safety and controls
Always be ready to take your power anywhere.
Runtime and fueling
From recreational use to emergency outages, this GP5500E electric start portable generator (battery included) makes it easy to use with reliable and hassle-free start ups.
Portability detail
Rough or rugged environments won't be an issue thanks to a hardened 1.25-in.
Connection options
steel-tube cradle for increased strength, fold down handle, covered outlets and heavy-duty, never-go-flat wheels.
Ownership note
The GP5500E is equipped with a Fuel Efficient 298cc OHV engine with EFI technology that optimizes fuel efficiency and requires less maintenance, with up to a 10.5-hour runtime at 50% load.
Additional manufacturer note
Onboard COsense® technology offers hazardous carbon monoxide protection, and the low-oil feature automatically shuts down the generator to prevent unit damage.
Best-fit uses
Standout features
Use the independent calculator before choosing a battery system or generator.
Ownership resources
Start with the exact Generac GP5500E COsense 50ST model or item number. Accessory families can look alike while using different connectors, electrical limits, engines, or mounting points.
Compatible accessories
Use a correctly rated cord or professionally selected inlet connection for the intended load.
This model’s published information references parallel operation. Use the manufacturer’s matching kit and pairing rules.
Model-matched filters, spark plugs, batteries, oil supplies, and service parts support scheduled maintenance.
A fitted storage cover protects a cooled, stored generator. A running shelter must be designed for generator operation.
Compatibility note: Links lead to manufacturer or official retailer resources. Confirm the full model or item number, connector type, voltage, amperage, and published compatibility list before buying. Installation involving a home panel, inlet, transfer switch, or fuel plumbing should be handled as required by local code.