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Intro
Operation
Customer
Assistance
Power Consumption
Installation
Installation
Power Consumption
For each piece of equipment you will be operating from the
Secondary Icons
inverter, you must determine the battery's reserve capacity
(how long the battery can deliver a specific amount of
current – in automotive batteries, usually 25 amperes) or
ampere-hour capacity (a measure of how many amperes
Notice
Caution
a battery can deliver for a specified length of time).
Example – Reserve capacity: a battery with a reserve
capacity of 180 minutes can deliver 25 amperes for
180 minutes before it is completely discharged.
Example – Ampere-hour capacity: a battery with an
ampere-hour capacity of 100 ampere-hours can deliver
5 amperes for 20 hours before it is completely discharged.
To determine the battery ampere-hour
capacity you require:
1. Determine how many watts each piece of equipment
consumes. This can normally be found on the product
label. If only the current draw is given, multiply the
current draw by 115 to get the watt consumption.
2. Estimate the time (in hours) that each piece of equipment
will be running between battery charging cycles.
3. Calculate the total watt-hours of energy consumption
(power x operating time) using the average power
consumption and the total estimated running time
(in hours). Power x Operating Time = Watt-Hours.
Laptop
50 watts x 2 hours
= 100 watt-hours
4. Divide the watt-hours by 10 to determine how many
power supply's (12 volt) ampere-hours will be consumed.
10
Warranty
Notes
Warning
Blender
300 watts x 15 minutes
= 75 watt-hours
Intro
Operation
Operation
Intro
Operation
Turning Your Inverter On or Off
•
Be sure to have your power inverter properly installed before
attempting to turn the unit on (see installation page 5).
Installation
POWER /
FAULT
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On/Off Switch to On
Installation
Main Icons
Secondary Icons
POWER
Main Icons
Intro
Operation
The inverter is now ready to deliver AC power to your loads.
Notice
If several loads are to be operated by the inverter, turn them
on separately, after the inverter has been turned on. This
Main Icons
will ensure that the inverter does not have to deliver the
Intro
Operation
Customer
Installation
starting currents required for all the loads at once.
Assistance
POWER /
FAULT
Secondary Icons
On/Off Switch to Off
Intro
Operation
Customer
Installation
Assistance
POWER
Secondary Icons
NOTE The On/Off Switch turns the control circuit
Installation
in the inverter on and off. It does not disconnect
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power from the inverter.
Notice
Caution
NOTE When the switch is in the off position, the
inverter draws no current from the battery. When
it's in the on position, but no power is being
Notice
Caution
supplied to the load, the inverter draws less than
500 milliamperes from the battery. This is low
current draw. It would take more than a week to
discharge a 100 ampere-hour battery at this rate
depending on the age of the battery.
Power On and Off
Customer
Warranty
Assistance
Customer
Warranty
Assistance
Notes
To turn the power inverter on:
USB
Notes
1. If a DC power supply is being
used as the power source, switch
it on.
2. On the left side panel, switch the
Notice
Caution
Warning
On/Off Switch to on.
Customer
Warranty
Assistance
Caution
Warning
Warranty
Notes
To turn the power inverter off:
USB
1. On the left side panel,
Warranty
switch the On/Off Switch
Notes
to off.
Notice
Caution
Warning
Notes
Warning
Warning
Nothing Comes Close to a Cobra
•
11
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