GUARDIAN provides peace of mind for homeowners with 24/7 automatic power protection from blackouts whether you are home or away. Back up preselected circuits or the whole house within seconds of a power outage. Permanently installed. Runs on LP or natural gas. Includes prewired, prepackaged, 10-circuit automatic transfer switch for easy installation.Engine OHVI Engine Displacement (cc) 1,600 Speed (RPM) 3,600 Rated Watts (kW) 10 Rated Watts LP (kW) 10 Rated Watts NG (kW) 9 Volts 120/245 Amps 41.6 Engine Cooling Air Start Type Automatic Phase 1 Noise Level (dB) 63 Transfer Switch Automatic NEMA 1 Fuel Type LP and natural gas Enclosure Steel Mounting Pad Yes Battery Required Yes Battery Included No Auto Shutdown Yes UL Listed Yes Dimensions L x W x H (in.) 49 x 24 x 28.25 Additional Product Specs * 10 kW liquid propane * 9 kW natural gas * Generac OHVI® 530cc industrial engine for long-run, long-life operation * Handsfree operation: no fueling, no manual starting, no extension cords * True Power™ technology for safe operation of sensitive electronics * Powerful output for greater starting power * Whisper-Test™ ultra-quiet self-test feature * Steel enclosure with tough paint finish for durability * External main circuit breaker * System status LED * Digital control panel * Automatic NEMA 1 transfer switch * 30-ft., 5-ft. and 2-ft. prewired conduits * Flexible fuel line connector * Outdoor connection box * Composite mounting pad * UL listed * 48in.L x 24in.W x 28 1/4in.H