How This Inverter Works; Protective Features; Rated Versus Actual Current Draw Of Equipment - Stanley PI120PS Instruction Manual

• Do not replace any vehicle fuse with one of a rating higher than recommended by the vehicle manufacturer. This product is
rated to draw 9 amperes from a 12 volt vehicle accessory outlet. Ensure that the electrical system in your vehicle can supply
this without causing the vehicle fuse to open. This can be determined by making sure the fuse in the vehicle that protects the
outlet is rated higher than 9 amperes. Information about the vehicle fuse ratings are typically found in the vehicle operator's
manual.
• If the vehicle fuse opens repeatedly, do not continue to replace it. Discontinue use of the vehicle accessory outlet and locate
the source of the overload. NEVER patch the fuse with tin foil, wire, or the like, as this may cause serious damage elsewhere in
the electrical circuit or cause a fire.
• Do not operate near flammable materials, fumes or gases.
• DO NOT expose to extreme heat or flames.
CAUTION – TO REDUCE THE RISK OF INJURY OR PROPERTY DAMAGE:
• Remove appliance plug from outlet before working on the appliance.
• DO NOT attempt to connect or set up the unit or its components while operating your vehicle. Not paying attention to the
road may result in a serious accident.
• Always use the inverter where there is adequate ventilation. Do not block ventilation slots.
• ALWAYS turn the inverter OFF by disconnecting it from the DC accessory outlet when not in use.
• Make sure the nominal powering voltage is 12 volts DC, center connection positive (+).
• Do not install in engine compartment — install in a well ventilated area.
• Do not use with positive ground electrical systems.* Reverse polarity connection will result in a blown fuse and may cause
permanent damage to the inverter and will void warranty.
*The majority of modern automobiles, RVs and trucks are negative ground.
• Keep in mind that this inverter will not operate high wattage appliances or equipment that produces heat, such as coffee
makers, hair dryers, microwave ovens and toasters.
• Do not open the inverter — there are no user-serviceable parts inside.
• Do not use this inverter with medical devices. It is not tested for medical applications.
• Keep away from children. This is not a toy!
• Install and operate unit only as described in this Instruction Manual.
• Do not use this inverter on a watercraft. It is not qualified for marine applications.
• Check unit periodically for wear and tear. Do not disassemble the unit; return it to the manufacturer when service or repair is
required. Opening the unit may result in a risk of electric shock or fire, and will void warranty.
• Read And Understand This Instruction Manual Before Using This Unit.
SAVE THESE INSTRUCTIONS
WARNING – TO REDUCE THE RISK OF INJURY OR PROPERTY DAMAGE: Follow these instructions and those published by the
manufacturer of any equipment you intend to use with this inverter. Review cautionary markings on these products.
INTRODUCTION
Thank you for purchasing the Stanley 120 Watt Power Inverter with USB Charging Port
®
personal electronics such as: laptop computers, digital/video cameras, MP3 players, cell phones, tablets, and more. It can also be
used to recharge 110/120 volt AC devices that have an appropriate recharging adapter with a standard North American two-
or three-prong plug. Please read this Instruction Manual carefully before use to ensure optimum performance and to avoid
damage to this product.

HOW THIS INVERTER WORKS

This inverter is an electronic device that converts low voltage DC (direct current) electricity from a battery to 120 volts AC
(alternating current) household power. It converts power in two stages. The first stage is a DC-to-DC conversion process that
raises the low voltage DC at the inverter input to 145 volts DC. The second stage is a MOSFET bridge stage that converts the
high voltage DC into 120 volts, 60 Hz AC.
Power Inverter Output Waveform
The AC output waveform of this inverter is known as a modified sine wave. It is a stepped waveform that has characteristics
similar to the sine wave shape of utility power. This type of waveform is suitable for most AC loads, including linear and
switching power supplies used in electronic equipment, transformers, and small motors.
CAUTION – RECHARGEABLE DEVICES
• Certain rechargeable devices are designed to be charged by plugging them directly into an AC receptacle. These devices may
damage the inverter or the charging circuit.
• When using a rechargeable device, monitor its temperature for the initial ten minutes of use to determine if it produces
excessive heat.
• If excessive heat is produced, this indicates the device should not be used with this inverter.
• This problem does not occur with most battery-operated equipment. Most of these devices use a separate charger or
transformer that is plugged into an AC receptacle.
• The inverter is capable of running most chargers and transformers.
PI120PS_ManualENSP_073015.indd 4-5
. This inverter can be used to operate
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CAUTION – INCOMPATIBLE PRODUCTS: Certain products contain power supplies or circuits that are not compatible with an
inverter using a modified sine wave output (such as this inverter) and may be damaged by using this inverter.
Some products must be powered from a pure sine wave power source, such as standard household power, or a "pure sine
wave" inverter in order to function properly. If your product requires pure sine wave AC input power to function properly, the
instruction manual for your product could state this. If in doubt, you should contact your product manufacturer PRIOR TO USE.
Your product could be damaged by this inverter if it contains:
• Microwave ovens;
• Transformerless battery chargers
• Capacitive coupled power supplies
If an incompatible product is used with this inverter:
• The product might not operate at all, with no indication of failure. The product fuse might open as a result of trying to use it
with the inverter.
• The product might exhibit unusual operation (such as, intermittent operation, buzzing, and the like.)
Note: Some laptop computers may not operate with this inverter.
WARNING: If the product does not operate normally, to reduce the risk of injury or property damage, turn the product
off immediately and unplug it from the inverter

PROTECTIVE FEATURES

The inverter monitors the following conditions:
Input Voltage Too Low: This condition is not harmful to the inverter, but could damage the power source, so the inverter will
automatically shut down when input voltage drops below 10.5 ± 0.5 volts DC.
Input Voltage Too High: The inverter will automatically shut down when DC input voltage exceeds 16 ± 0.5 volts, as this can
harm the unit.
Thermal Shutdown Protection: The inverter will automatically shut down when the unit becomes overheated.
Overload/Short Circuit Protection: The inverter will automatically shut down when an overload or short circuit occurs.
Note:
The Power/Fault LED Indicator will light red to indicate a fault condition before automatic shutdown occurs.

RATED VERSUS ACTUAL CURRENT DRAW OF EQUIPMENT

Most electrical tools, appliances, electronic devices and audio/visual equipment have labels that indicate the power consumption
in amps or watts. Be sure that the power consumption of the item to be operated is below 120 watts for 30 minutes and 100
watts continuous or the unit may overheat and shut down. If the power consumption is rated in amps AC, simply multiply by
the AC volts (120) to determine the wattage.
Resistive loads are the easiest for the inverter to run; however, it will not run larger resistive loads (such as electric stoves and
heaters), which require far more wattage than the inverter can deliver. Inductive loads (such as TVs and stereos) require more
current to operate than do resistive loads of the same wattage rating.
For safety reasons, the inverter will simply shut down if it is overloaded. To restart the unit, simply unplug all devices plugged
into the inverter; disconnect the inverter from any 12 volt DC power source; then reconnect the inverter BEFORE plugging the
appliance(s) back in.
OPERATING INSTRUCTIONS
The bi-color power/fault LED indicator lights blue when the Inverter is properly connected to a functioning DC power source.
The AC and USB outlets are ready to use. (If the bi-color power/fault LED indicator lights red, refer to the Troubleshooting
Section of this Instruction Manual.)
To turn the unit off, disconnect it from the 12 volt DC power source.
Note:
This inverter has a pivoting power plug that can be rotated forward and upward to maximum of 180 degrees to adjust the orientation. Do not attempt
to forcibly rotate the power plug beyond its maximum angle.
CAUTION – TO REDUCE THE RISK OF PROPERTY DAMAGE:
• The Power Inverter must be connected only to batteries with a nominal output voltage of 12 volts. The unit will not operate
from a 6 volt battery and will sustain permanent damage if connected to a 24 volt battery.
• Always connect the inverter to the 12 volt DC power source before plugging any devices into the unit.
• The standard North American 120 volt AC and USB outlets allow simultaneous operation of multiple devices.
wattage of all equipment simultaneously plugged into the PI120PS does not exceed 120 watts for 30 minutes or 100 watts
continuous.
Operation of the 120 Volt AC Outlet and USB Charging Port
1. Connect the unit to a vehicle's accessory outlet or other 12 volt DC power source. Make sure there is adequate space for
proper ventilation of the inverter.
2. Rotate the unit slightly to make sure there is good contact.
Ensure that the
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