FINDING THE RIGHT STANLEY GENERATOR FOR YOU

Why choose a STANLEY generator?

STANLEY'S® versatile utility & inverter generators provide portable electric power to support activities ranging from recreational to industrial; from camping to DIY.

From the light compact ST1000i to the commercial grade SU6500e producing up to 6600 watts of power, STANLEY generators are designed for practicality, reliability and ease of use.

 

How to choose your STANLEY generator

The first step is to determine what type/style of generator is required. The choice is between the traditional utility generators and the newer “silent” inverter generators.

The determining factor tends to be the purpose for which the generator is required. In most cases they will want one either for recreational activities such as camping, caravanning, etc. or for work, usually in construction related activities. Although both types of generator can fulfil most needs, inverter generators tend to be preferred for recreational activities because they are quieter (a must on camping sites), lighter and more compact and they can safely operate the sensitive equipment, which enhances recreational activities (TV’s, computers, mobile phones, etc.). The louder, tougher and usually less expensive utility generators on the other hand, are well suited to robust conditions found on worksites.

Once the type of generator required has been identified we need to know what output (i.e. power in Watts or kVA) is required.

The ideal generator size is one that is correctly matched to the power required by all the equipment needed to be to run at the same time. If it is too powerful, not only will it be more expensive to purchase, but it will also cost more to run. If it is too small, some equipment may not be able to run effectively or at all and overloading the generator will reduce its lifespan.

 

How to determine the output required

Add up all the ‘Average Watts’ for every appliance or motor that is going to be run at any one time (if there are going to be more than one combination, choose the combination which has the biggest load) and add the single highest starting Watts. The correct sized generator will be one which has a maximum or peak output wattage:-

  • slightly greater than the total watts required (using our example below, this would mean greater than 6390 watts); and
  • about 20% greater than the calculated total Average Watts required.
  • To find the power requirements of the tools or appliances which are intended to be powered by the generator, look at their rating plate:- all electrical appliances and electric motors, should have an electrical rating plate stating their power and electrical requirements, including running and starting power requirements.

    However, because different appliances may use different units of measure (these can be expressed in Watts, kW or HP), you may need to convert all the power requirements to a common unit of measure e.g. Watts. To convert to Watts, if the appliance has a rating plate showing:

    kW - multiply x 1000 to convert to Watts

    HP - multiply x 746 = Watts

    Amps - Volts (eg: 240) x amps = Watts










    Example of a calculation to determine the required power

    APPLIANCE/POWER TOOLRUNNING WATTSSTARTING WATTS
    5 x 100 watt lights5000
    Kettle18000
    Toaster6000
    550 Watt motor7402200
    Refrigerator5501350
    Running Watts+ Highest Starting Watts= Total Watts Required
    TOTAL419022006390

    Please note: a generator should never be operated at its maximum output for more than 30 minutes. If it is necessary to operate a generator for more than 30 minutes at its maximum output, it is advisable to use a more powerful generator so that the total continuous demand is no more than 80% of the maximum wattage.

    Please bear in mind that appliances using electric motors require significantly more power to start up than to run:- a rule of thumb is 4 times the ordinary running power required.

     

    Generalised power demands of typical appliances

    Please note:- the table contains estimates and has been simplified to generally cover typical requirements. For the actual wattage requirements please check the specific power tool or appliance. Because of the varying nature of many electric motor driven devices, you should check the rating plate and contact the manufacturer if there is no rating plate.

     Appliance

    Rated Watts
    (Appliances)

     kVA required to
    operate appliance

    kVA required to
    start appliance

     Air Conditioner (Rev-cycle)

    200-2500

    0.25-3.13

    1-12.5

     Clothes Dryer

    2400

    3

    3

     Coffee Percolator

    550

    0.69

    0.69

     Can Opener

    100

    0.13

    0.52

     Deep Freezer

    500

    0.63

    2.52

     Disposal Unit

    650

    0.81

    3.24

     Domestic Water Pumps

    275-1000

    0.34-1.25

    1.36-5

     Exhaust Fan

    40

    0.05

    0.2

     Food Processor

    500

    0.63

    2.52

     Frypan

    1400

    1.75

    1.75

     Hair Dryer

    1500

    1.88

    1.88

     Hot water Service

    2500-3000

    3.13-3.75

    3-13-3.75

     Iron

    800-1500

    1-1.88

    1-1.88

     Kettle or jug

    1600-3000

    2-3.75

    2-3.75

     Lights

    25-200

    0.03-0.25

    0.03-0.25

     Microwave

    1500

    1.88

    1.88

     Radio

    60

    0.08

    0.08

     Radiator

    1000-2500

    1.25-3.13

    115-3.13

     Refrigerator (home)

    300

    0.38

    1.52

     Sewing Machine

    60

    0.08

    0.32

     Television

    75-200

    0.09-0.25

    0.09-0.25

     Toaster

    250-1250

    0.3-1.56

    0.3-1.56

     Washing Machine

    500-3000

    0.63-3.75

    2.52-15