expect an operating time of 2 to 3 hours. It is recommended that you start your vehicle once an hour when using the RPPD1500 for extended periods of time to prevent draining the battery.
WARNING: To prevent personal injury or loss of life, never start or leave your engine running in a poorly ventilated area such as a garage.
Helpful Formulas:
To Convert AMPS to WATTS: AMPS X VOLTS = WATTS
To Convert WATTS to AMPS: WATTS ÷ VOLTS = AMPS
These formulas yield a close approximation of the continuous loads of a product.
To calculate approximate Startup Load: Multiply: WATTS X 2 = Starting Load
This formula yields a close approximation of the starting load of the appliance, although some may require an even greater starting load. NOTE: Induction motors such as air conditioners, refrigerators, freezers and pumps may have a start up surge of 3 to 7 times the continuous rating. Most often the start up load of the appliance or power tool determines whether an inverter has the capability to power it.
For example: You have a freezer with a continuous load of 4 amps, and a start up load of 12 amps:
4 amps x 120 volts = 480 watts continuous, 12 amps x 120 volts = 1440 watts starting load
You would need an inverter with
FORMULA to convert AC Watts to DC Amps: AC Watts divided by 12 x 1.1 = DC Amps
This is the size vehicle alternator you would need to keep up with a specific load; for example, to keep up with a continuous draw of 1000 watts, you would need a 91 amp alternator.
To calculate the total
Multiply the power by the operating time. To determine how many
Example: 150 Watts x 1 Hour = 150 Watt Hours
150 Watt Hours ÷ 10 = 15 12 Volt Amp Hours
