Briggs & Stratton PowerProtect 12kW (040666) is a home standby generator from Briggs & Stratton, rated 12,000 running watts on propane and 10,800 W on natural gas, measured at 70 dBA, with 120/240V output.
General
Type
home-standby
Fuel
natural-gas, propane
Power output
Running watts (gas / LP for standby)
12000 W
Running watts (propane)
12000 W
Running watts (natural gas)
10800 W
Performance
Noise level
70 dBA
NG use at half load
117 ft³/h
Propane use at half load
1.7 gal/h
Electrical
Output voltage
120/240V
Automatic transfer switch included
No
Main-line circuit breaker
60 A
Features
Start type
automatic
Engine
Engine
Briggs & Stratton Vanguard M38
Engine displacement
623 cc
Physical
Weight
361 lb
Warranty
Warranty
6 yr
What the numbers mean
At 12,000 running watts
on its best fuel, this unit covers most household circuits through an appropriately sized transfer switch; central air conditioning typically needs load management or a soft starter.
Runs on natural gas, propane — expect lower output on propane (roughly
10%) and natural gas (roughly 20%) than on gasoline; the spec table shows the
published per-fuel ratings.
Estimated fuel cost for 24 h at ~50% load: about $42 on natural gas at
national average prices (assumptions).
Permanently installed unit: sizing, gas-line capacity, placement clearances, and
the transfer switch are a job for licensed installers under local permits.
Compare the Briggs & Stratton PowerProtect 12kW (040666)
What can the Briggs & Stratton PowerProtect 12kW (040666) run during an outage?
With 12,000 running watts on its best fuel, the Briggs & Stratton PowerProtect 12kW (040666) covers most household circuits through an appropriately sized transfer switch; central air conditioning typically needs load management or a soft starter. Add up your actual loads with a sizing worksheet — the bands here are rough guidance, not a load calculation.
What does the Briggs & Stratton PowerProtect 12kW (040666) cost to run for a day?
Roughly $42 for 24 hours of continuous operation at about 50% load on natural gas, at national average fuel prices. The assumptions behind this estimate are documented on the methodology page; your fuel price and load change the figure.
Does the Briggs & Stratton PowerProtect 12kW (040666) start automatically?
Yes — home standby generators monitor utility power and start themselves when it fails; pairing it with an appropriately sized automatic transfer switch (sold separately for some configurations) completes the automatic changeover.
