Power Generator

We have fairly frequent power failures, due to trees falling on power lines, and we expect that when there is a large fire in the area we will be without power for days. So we wound up getting a 5.5kw generator which has proved to be great. This page was mostly written when I was trying to decide what to get.

Loading Calculation

Always ON Loads

APPLIANCE	RATED	SURGE
Freezer	375	+200
Fridge	375	+200
Television	375	+100
Lights	100	+0
Heater fan / Cooler fan	750	+300
Computer - Aslan	100	+100
Computer - Merlin	100	+100
Computer - Yoda	200	+0
TOTAL	2200	+300

Intermittent Loads

APPLIANCE	RATED	MAXIMUM
Lights (extras)	200	200
Microwave Oven	1000	1200
Computer - Merlin	50	200
Computer - Yoda	200	200
Kettle	1200	1200
Washing Machine	1000	1200
Toaster	1200	1200

Therefore:
Required base load: 2.2kW continuous, 2.5kW max
Required allowance for intermittent loads: 1200 Watts.

Total sought:
3.4kW continuous
3.7kW maximum

Loading Reference

APPLIANCE	RATED	MAXIMUM
100mm Angle Grinder	850	850
Air Conditioner 2hp	1490	3800
Cd / Radio / Cassette	85	85
Computer	200	200
Deep Freezer	450	670
Fan	350	350
Fast Boil Kettle	1200	1200
Florescent Light	40	40
Hair Dryer	650	1100
Household Water Pump 1hp	745	2235
Incandescent Light	100	100
Iron	1000	1000
Microwave	700	2000
Refrigerator - Small	375	500
Television	375	375
Toaster	1100	1100
Vacuum Cleaner - Medium	1000	1000
Washing Machine � Full Size Auto	1000	3000

Noise Level Reference

Normal Breathing 10dB
Soft whisper (at 5m) 30dB
Normal Conversation 60dB
Busy Traffic 70dB
Average Factory 80dB
Niagra Falls 90dB

Sought Generator

Power	3.5kw continuous, 4kw peak
Run time	4 hours at full load 8 hours at 500W (heating/cooling fan) load
Fuel	ULP
Noise	less than 65db at 7m

Current 1kw Generator

Specs:

• Power 900W continuous
• 1kW peak
• Noise 64dB at 7m

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