Centech 200 watt continuous Assembly instructions

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Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual near the assembly diagram (or month and year of purchase if product has no number).
Keep this manual and the receipt in a safe and dry place for future reference.
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright©2009 by Harbor Freight Tools®. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in
any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
REV 15g

Page 2 For technical questions, please call 1-888-866-5797. Item 66967
WARNING SYMBOLS AND DEFINITIONS
This is the safety alert symbol. It is used to alert you to
potential personal injury hazards. Obey all safety messages
that follow this symbol to avoid possible injury or death.
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Addresses practices not related to personal injury.
IMPORTANT SAFETY INFORMATION
Read all safety warnings and instructions.
Failure to follow the warnings and instructions may result in electric shock, fire and/
or serious injury. Save all warnings and instructions for future reference.
General Precautions
1. People with pacemakers should consult
their physician(s) before use.
Electromagnetic fields in close
proximity to heart pacemaker could
cause pacemaker interference
or pacemaker failure.
2. WARNING: The brass components of
this product contain lead, a chemical
known to the State of California to
cause cancer and birth defects or other
reproductive harm. (California Health
& Safety Code § 25249.5, et seq.)
3. WARNING: This product contains
or, when used, produces a chemical
known to the State of California to
cause cancer and birth defects or other
reproductive harm. (California Health
& Safety Code § 25249.5, et seq.)
4. WARNING: The cord of this product
contains lead and/or di (2-ethylhexyl)
phthalate (DEHP), chemicals known
to the State of California to cause
cancer, and birth defects or other
reproductive harm. Wash hands
after handling. (California Health &
Safety Code § 25249.5, et seq.)
5. The warnings, precautions, and
instructions discussed in this instruction
manual cannot cover all possible
conditions and situations that may
occur. It must be understood by the
operator that common sense and
caution are factors which cannot
be built into this product, but must
be supplied by the operator.

Page 3For technical questions, please call 1-888-866-5797.Item 66967
Installation Precautions
1. DO NOT INSTALL THIS INVERTER
INTO A BUILDING’S ELECTRICAL
SYSTEM. This inverter is a vehicular
accessory. It is not designed to be
safely used in a building’s electrical
system and has not been evaluated
to meet building wiring codes.
Improper application may create
a fire or electric shock hazard.
2. To allow proper cooling, install in indoor
well-ventilated area and do not cover
ventilation openings or cooling fins.
Do not install in engine compartment.
Especially avoid placing the Inverter
on carpets and rugs; they are
not only flammable, but they also
obstruct vents underneath it.
3. Keep combustible materials and
gasses away from the inverter.
The inverter produces sparks and heat
during operation and can start a fire.
4. Connect to 12 VDC power supply only.
A power supply with lower voltage will
not operate the Inverter correctly, and
higher voltage could damage the unit.
5. Connect input polarity properly.
Incorrect connection will damage
inverter and void warranty.
6. Do not use in a marine application.
This inverter is not intended to withstand
the highly corrosive conditions in
marine applications and would quickly
be rendered inoperable or unsafe.
7. Keep inverter dry and clean.
Do not expose to rain, snow,
spray, bilge water or dust.
8. Install as close to DC source as
possible, but not in a closed area
with vented lead-acid batteries.
Vented lead-acid batteries release
explosive hydrogen gas that can
be ignited by the inverter.
9. Mount inverter horizontally.
10. Verify that installation surface
has no hidden utility lines before
drilling or driving screws.
11. This product is not a toy.
Keep it away from children.
12. Do not use with positive
ground electrical systems.
(Most automobiles, trucks, and RV’s
have negative ground systems.)
13. The positive (+) battery on the Inverter
must be the last connection made,
and must be connected before the
Inverter is turned on. There may
be a small spark during the final
connection. This is normal.
14. Properly ground the inverter’s case
as explained in this manual.

Page 4 For technical questions, please call 1-888-866-5797. Item 66967
Battery Precautions
1. Wear splash-resistant
ANSI-approved safety goggles
and electrically insulated gloves
while working near batteries.
2. Charge, store, and maintain batteries
according to supplier’s instructions.
3. Locate batteries in a clean,
well-ventilated area, away from ignition
sources and flammable materials.
Vented lead-acid batteries release
explosive hydrogen gas while charging.
4. Only connect similar batteries together.
Do not connect old and new batteries
together, wet and gel cells together, or
batteries of different capacities together.
5. Use only 12 V batteries with this item.
6. Connect batteries in parallel ONLY
(negative terminals together to
one cable; positive terminals
together to the other cable).
7. Install a properly rated fuse on the
positive output of the battery bank.
Operation Precautions
1. Multiple outlet power strips with switches
and circuit breakers only interrupt
power to the “hot” receptacle terminals.
The “neutral” terminals remain powered
with respect to the “ground” terminals.
So strip switch may be off, but part
of appliance may still be powered.
2. Inspect supply connections before
use to ensure they are tight and
that insulation is not damaged.
3. Do not use this inverter to power
sensitive devices such as medical
devices or computers. However, it may
be used to charge a computer battery.
Do not use in ignition protected areas.
4. Some rechargeable tools and
appliances can damage the Inverter.
Check the temperature of the device
several times when it is charging.
If the device becomes extremely hot;
turn the power off, remove the device,
and do not use with the Inverter again.
5. Check for breakage of parts and any
other condition that may affect the
Inverter’s operation. If damaged,
have it repaired before use.
6. Do not attempt to power a device,
or combination of devices, that will
require more than the rated output of
this inverter. This may damage the
inverter or the attached devices.
7. Appliances such as microwave
ovens will normally draw
more than their rated current.
For example: A typical
600 watt microwave oven will draw
approximately 1,000 watts.
8. Do not attach a battery charger if
the charger carries a warning that
dangerous voltages are present
at the battery terminals.
9. Some fluorescent lamps may not
operate properly with this type of
inverter. If the bulb appears to be
too bright, or fails to light, do not
use the lamp with this inverter.
10. Some fans with synchronous motors
may slightly increase in speed when
powered by the inverter. This is not
harmful to the fan or to the inverter.
11. Inverter will consume some power
while on, even without loads attached.
Turn inverter off after use.

Page 5For technical questions, please call 1-888-866-5797.Item 66967
Service Precautions
1. DO NOT OPEN HOUSING.
Contains no user-serviceable
parts. Internal parts may be
electrified, even with unit off and
power disconnected.
2. Maintain labels and nameplates
on the Inverter. These carry
important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
3. Have your Inverter serviced by
a qualified repair person using
only identical replacement parts.
This will ensure that the safety
of the Inverter is maintained.
4. Fuses must be replaced with fuses
of the same type and rating only.
SAVE THESE INSTRUCTIONS.
Symbology
Double Insulated
Canadian Standards Association
Underwriters Laboratories, Inc.
Volts Alternating Current
Alternating Current Supply
Direct Current Supply
AAmperes
Equipment Grounding Conductor

Page 6 For technical questions, please call 1-888-866-5797. Item 66967
Specifications
Input Voltage 12 VDC (nominal)
Output Voltage 115 VAC / 60 Hz
Continuous Power 200 W
Surge Power 400 W
Operating Conditions 32° - 104° F
Receptacles Two 3-prong grounded polarized AC outlets
One 5 VDC 500mA USB outlet
Fuse Type 25 Amp Internal Blade-type Fuse (professional replacement only)
Cables 12 AWG x 23"
Output Waveform
Sine
Wave
Modified
Sine Wave
(MSW)
1. This inverter’s output is a
Modified Sine Wave. Power from
most electric utilities is a Sine Wave.
Note: Only multimeters identified
as “TRUE RMS” will read
Modified Sine Wave voltage accurately.
2. Modified Sine Wave (MSW) power is
suitable for most AC devices and power
supplies used in electronic equipment,
transformers, and motors. Do not use
to power sensitive devices such as
medical equipment or computers. Some
audio equipment may perform poorly
if run on Modified Sine Wave power.
3. Sine Wave inverters provide power
that is identical to, or even better than,
the power supplied by your power
company. Motors start easier and
run cooler under Sine Wave power.
Certain devices, such as laser printers,
variable speed motors and digital
clocks, require sine wave power to
operate properly. Sine wave inverters
are typically more expensive for
their capacity than other inverters.
3069523

Page 7For technical questions, please call 1-888-866-5797.Item 66967
Installation
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the
beginning of this manual including all text under subheadings therein
before set up or use of this product.
CAUTION! This Inverter must only be connected to batteries with an output
voltage of 12 volts DC. Lower voltage will not operate the Inverter properly,
and more voltage could damage the Inverter or the device being powered.
Do not use this Inverter with positive ground electrical systems.
The Inverter is configured to have a number of shut-down points,
for the safety of the operator, the unit, and the devices being used with it.
• If the DC input voltage drops too low,
the alarm on the Inverter will sound.
Should the input voltage drop further,
the Inverter will shut down automatically
to prevent permanent battery damage.
Recharge the battery soon.
• If the DC input voltage exceeds 15.2V
the Inverter will shut down automatically.
• If the output load power rises higher
than the rating power of the Inverter;
the unit may shut down automatically.
• The Inverter may automatically
shut down if its internal
temperature gets too high.
Note: Even though this inverter has built-in mechanisms to minimize damage,
the above situations should be avoided because they can still
damage the inverter, battery, and/or attached device(s).
Functions
AC Outlets USB Outlet
Power Button
Alligator
Clips
Power LEDFault LED Power Terminal
- 1 of 2

Page 8 For technical questions, please call 1-888-866-5797. Item 66967
Operating Instructions
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the
beginning of this manual including all text under subheadings therein
before set up or use of this product.
1. Place the Power Inverter on a flat
surface that has adequate ventilation
and is not in direct sunlight. Locate
the Inverter close enough to the car
battery so that the Cables can easily
reach the Inverter and the car battery.
Position the Inverter so that the Outlets
are easily and safely accessible.
2. To connect the Cable Ring
Terminals to the (Positive) red and
(Negative) black Power Terminals
on the back of the Inverter:
a. Make sure the Inverter’s
Power Button is in the OFF position.
b. Unthread the knobs covering
the Power Terminals.
c. Slide the red Cable’s Ring
Terminal over the post of the red
Power Terminal and the black
Cable’s Ring Terminal over the
post of the black Power Terminal.
d. Replace the knobs and
tighten securely.
WARNING! Use only the included cables
or 4 AWG cables up to 10 feet long.
Thinner/longer cables may cause
overheating and damage the inverter
and/or connected devices.
3. Apply the parking brake to the
vehicle connected to the battery.
Place the transmission in “Park”
for an automatic transmission,
or in “Neutral” for a manual
transmission. Start the car engine.
4. Attach the red Cable’s Alligator Clip
to the Positive (red) terminal on the
battery, then attach the black Cable’s
Alligator Clip to a clean unpainted metal
part of the chassis. If connecting to
a battery not installed in a vehicle,
connect to the Negative (black) terminal.
5. The red Fault LED will light up
momentarily and the alarm will
sound as the Inverter draws power.
Then the alarm and red LED will turn off.
Note: If the alarm continues and
red Fault LED stays lit, check the
Troubleshooting Tips section near
the end of this manual to correct
the issue before continuing.
6. Press the Power Button to
turn on the inverter.
7. To power each device or appliance:
a. With the device or appliance
switched off, plug it into one of the
Power Outlets or the USB Outlet
on the Power Inverter.
b. Turn on the device and/or appliance.
8. After use, turn all connected devices
or appliances off, unplug them, then
turn off the car engine if it is running.
Keep the inverter turned on and remove
the alligator clips from the battery
posts, removing the Negative (black)
clip first, then the Positive (red) clip.
The alarm and red LED light will turn
on as the Inverter powers down.
Turn off the Inverter Power Button.

Page 9For technical questions, please call 1-888-866-5797.Item 66967
Operating Tips
The total wattage of all items plugged into
the Power Inverter must not use more than
200 watts during continuous operation,
otherwise the Inverter may overload.
If an alarm sound is heard, turn
off the appliances and check the
Troubleshooting Tips section to correct
the issue before continuing.
NOTICE: Some rechargeable appliances
may damage the Power Inverter or
the appliance. When first using a
rechargeable device, check the inverter’s
temperature for the first 10 minutes.
If it becomes abnormally hot, do not
use this device with the Inverter.
NOTICE: It is recommended that the vehicle
be running when you first connect the
Power Inverter. Thereafter the engine can
be on or off. If using the Power Inverter with
the engine off start and run the engine every
hour for at least 10 minutes to recharge the
battery. Doing this will help prevent any
unexpected shutdown of the equipment.
This will also help ensure that there will be
enough battery power to start the vehicle.
WARNING! To prevent serious injury
and death from carbon monoxide
inhalation, do not run the vehicle’s
engine within an enclosed area.
Do not use car battery to power the Inverter
for extended periods of time with appliances
requiring high continuous load levels.
The battery may become drained to the
point that it will not be able to start your car.
Deep cycle (marine and RV) batteries
can be charged more times than
a car battery, and are a better choice for
repeated use of the Power Inverter.
Do not discharge your car battery more than
10% of its total capacity, and deep cycle
batteries more than a 50% discharged state.
Typical Appliance Power Consumption
Product Running
Watts
Additional
Start-up Watts
Stereo 200 0
Table Fan 200 200
TV-VCR 250 0
Small Refrigerator 350 700
Hand Drill - 1/2" 600 600
Light Bulb - 100 W 100 0
Microwave - 1000 W 1500 200
AC (5,000 BTU) 700 700
Note: This chart is intended as a general guideline only,
actual appliance wattage requirements will vary.
Some appliances listed above may require a pure sine
wave inverter instead for proper operation.

Page 10 For technical questions, please call 1-888-866-5797. Item 66967
Troubleshooting Tips
• If the alarm sounds, this means that
the input voltage is at or below 10.9 V.
Stop using the Power Inverter
and recharge the battery.
If this is not done, the Inverter will
shut off automatically at 10.5 V.
• If you are unsure if the inverter will
have the proper amount of current to
run your devices, add up the total of
the continuous wattage for the items.
If this figure is under 200 watts, then the
Inverter will be able to run the
items at the same time.
• If your product, such as a television
will not start, it is important to keep in
mind that some appliances (including
many televisions) may require two to
six times their wattage to start up.
• If your audio system buzzes while using
this inverter, it is because some sound
systems can not filter out the modified
sine wave produced by the inverter.
Use a sound system that incorporates
a higher quality power supply.
• This inverter is made to minimize the
interference with TV signals. However,
especially with weak TV signals,
some interference may still be visible.
To correct this, place the inverter as far
away as possible from the television
antenna and it’s cables. Next, adjust
the orientation of the inverter to
the antenna cables and TV power
cord to minimize the interference.
Also use a shielded antenna cable.
• If the low battery alarm is on all the
time, try these corrective measures:
Recharge battery if in poor condition.
Next, check the battery connection.
You may need to clean the connectors.
• If you are getting a low output voltage,
try reducing the load to minimize watts.
You may have overloaded the inverter.
Reduce the number of watts you
are powering. Also, keep input
voltage above 11 volts to maintain
a constant flow of power.
• If you are not getting any power output,
turn the power switch Off and On again.
The devices may draw too much
power to operate them. The
inverter may be in thermal shutdown.
Let it cool down and make sure there is
adequate ventilation around the unit.

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Maintenance and Servicing
Procedures not specifically explained in this manual
must be performed only by a qualified technician.
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION:
Make sure that all loads are disconnected from the Inverter, the Power Button
is in the off-position and the cables are disconnected from power
source before performing any procedure in this section.
TO PREVENT SERIOUS INJURY FROM TOOL FAILURE:
Do not use damaged equipment. If abnormal noise or vibration
occurs, have the problem corrected before further use.
1. BEFORE EACH USE, inspect the
general condition of the tool. Check for:
• loose hardware,
• misalignment or binding
of moving parts,
• damaged cord/electrical wiring,
• cracked or broken parts, and
• any other condition that may
affect its safe operation.
2. AFTER USE, wipe external surfaces
of the tool with clean cloth.
3. Maintain batteries according to
manufacturer’s instructions.
Check electrolyte level on all batteries
after charging and refill as needed.
Charge batteries according to
manufacturer’s recommendations
ONLY; incorrect charging may cause
battery damage or explosion.
WARNING! TO PREVENT
SERIOUS INJURY AND DEATH
FROM ELECTRIC SHOCK:
DO NOT OPEN HOUSING!
Contains no user-serviceable parts.
Internal parts may be electrified, even
with unit off and power disconnected.
4. Internal electronic components must
be disposed of properly or recycled.

Limited 90 Day Warranty
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality
and durability standards, and warrants to the original purchaser that this product is free from
defects in materials and workmanship for the period of 90 days from the date of purchase.
This warranty does not apply to damage due directly or indirectly, to misuse, abuse, negligence
or accidents, repairs or alterations outside our facilities, criminal activity, improper installation,
normal wear and tear, or to lack of maintenance. We shall in no event be liable for death,
injuries to persons or property, or for incidental, contingent, special or consequential damages
arising from the use of our product. Some states do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitation of exclusion may not apply to you.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with transportation
charges prepaid. Proof of purchase date and an explanation of the complaint must accompany
the merchandise. If our inspection verifies the defect, we will either repair or replace
the product at our election or we may elect to refund the purchase price if we cannot readily
and quickly provide you with a replacement. We will return repaired products at our expense,
but if we determine there is no defect, or that the defect resulted from causes not within
the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also
have other rights which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • 1-888-866-5797