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The Briggs & Stratton 40305b - home standby generator (20kw lp- 18kw natural gas) has been discontinued and is not available for purchase at this time.

Briggs & Stratton 40305B - Home Standby Generator (20kW LP- 18kW Natural Gas)

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Airooled Standby Generators
18 kW
Rated Watts
4-Year Limited Warranty
Covers both parts and labor

Briggs & Stratton V-Twin Commercial Engine
Provides years of long lasting, reliable standby power

Sound Shield™ Technology
Ensures ultra-quiet, neighbor-friendly operation (Only 68 dB)

Patented Central Air Technology When Using ACCM-II Transfer Panel
Manages demands of up to two 5-ton central air conditioners

CoastGuard™ All-Climate Enclosure
Automotive rust proofing paint process reduces corrosion

Turnkey Extras
Automatic battery charger
Polymer installation pad
Synthetic oil
Hour meter
LP and Natural Gas configured
  Model Number:40305B
 Manufacturer:Briggs & Stratton
 Made in USA:Yes
 Brand:Briggs & Stratton Vanguard
 HP/CC:993 cc
 Consumer Engine Warranty:4 Years
 Commercial Engine Warranty:Not Available
 Engine RPM:3600 RPM
 Low Oil Alert/Shutdown:Yes
Product Specs
 Voltage120/240 Single-Phase
 Frequency:60 Hertz
 Cooling SystemAir Cooled
 Fuel TypeLP/Natural Gas
 NG Power Capacity18,000 Watts
 LP Power Capacity20,000 Watts
 NG Consumption (50% Load)160 ft³/hr (BTU: 160,000 BTU/HR)
 LP Consumption (50% Load)1.95 gallons/hr (BTU: 176,963 BTU/HR)
 Rated Amps:75 Amps @ 240 Volts (Single Phase)
 Decibel Rating @ 7m:68 db(A)
 A/C Ton Rating5-Tons
 Mounting PadComposite (Included)
 Transfer Switch:Automatic (Not Included)
 Battery:Not Included
 UL ListedYes
 Weight:600 Lbs. (272.16 kilograms)
 Dimensions:48L x 33W x 30.5H
(121.92 x 83.82 x 77.47 cm)
 Consumer Warranty:4 Years
 Commercial Warranty:Not Available

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Briggs and Stratton 50/50 Referral Rebate
  1 Question
Q: I'm going to build a house in the spring of 2013 and I want to have a standby generator installed when the house is built.

What would be the best size generator? I plan on having a geothermal heating/ac system and the house will be all electric.

by Dan from Kansas on August 06, 2012

A: Thank you for visiting Electric Generators Direct. In regards to your question, the generator size is determined by the starting amperage load of the equipment you are planning on powering when you lose power.

The starting amperage load will be much larger than the running load and proper calculations need to be done to properly size a unit.

We recommend having a certified electrician do your wattage calculations as every home is different.

The electrician would calculate with the following formula to properly size the generator which should be sized at 80% of its running capacity to allow enough flexibility to handle large intermittent loads and still keep voltage output at proper levels.

(Starting Amps x Volts = Watts)

Note: Geo-Thermal systems can require a tremendous amount of starting current and all calculations should be done onsite professionally.

by Mike, Product Expert

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