Power Bright ML3500-24 - Manuel (Page 5)

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Making the connection to the Positive terminal may cause a spark as a
result of current flowing to charge capacitors within the inverter. This is
a normal occurrence.
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Because of the possibility of sparking, however, it is extremely important
that both the inverter and the 24 volt battery be positioned far from any
possible source of flammable fumes or gases. Failure to heed this
warning could result in fire or explosion.
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Operating the inverter without correctly grounding the unit may result in
electrical shock.
Getting Started
When a motorized appliance or a tool turns on, there is an initial surge of
power to start. This surge of power is referred to as the "starting load" or
"peak load." Once started, the tool or appliance requires less power to
operate. This is referred to as the "continuous load" in terms of power
requirements. You will need to determine how much power your tool or
appliance requires to start up (starting load) and it's continued running
power requirements (continuous load).
Power consumption is rated in watts, or it can be calculated from
amperes (amps). This information is usually stamped or printed on most
appliances and equipment. If this information is not indicated on the
appliance or equipment, check the owner's manual. For electrically
sensitive equipment, contact the manufacturer to determine if the device
you are using is compatible with modified sine wave AC.
Multiply: AC AMPS X 110 (AC voltage) = WATTS
This formula yields a close approximation of the continuous load of your
appliance.
Multiply: WATTS X 2 = Starting Load for most appliances
This formula yields a close approximation of the starting load of most
appliances. Exceptions are motorized appliances such as pumps,
freezers and air conditioners. These appliances can have startup loads
of up to eight times the rated watts.