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8ZED Power Inverter
Installation Manual and
Converts 12 Volts DC to 220/230/240 Volts AC
To get the most out of your 8ZED Inverter, proper
installation is critical. Please read the installation and
operating instructions in this manual carefully before
installing and using your 8ZED Inverter. Pay special
attention to the CAUTION: statements in this manual.
CAUTION: statements identify conditions or practices
which could result in damage to your 8ZED Inverter or to
other equipment. Proper procedures not followed could result
in the warranty becoming void.
The power source must provide between 11 and 15 volts
DC and must be able to supply sufficient current to operate
the load. As a rough guide line, divide the power
consumption of the load (in watts) by 10 to obtain the current
(in amperes) that the power source must deliver.
CAUTION: The 8ZED Inverter should not be used while
driving your vehicle using the alligator clips.
CAUTION: The 8ZED Inverter must be connected only to
batteries with a normal output voltage of 12 volts. The 8ZED
Inverter will not operate from a 6 volt battery and will be
damaged if it is connected to a 24 volt battery.
CAUTION: Rechargeable batteries and devices with
rechargeable batteries may not be suitable for use with the
8ZED Inverter. The rechargeable batteries, recharging
transformer and/or the 8ZED Inverter may be damaged when
trying to recharge devices of 10 volts and higher. Refer to the
manufacturers specifications when using these devices.
SUITABLE POWER SOURCE
In order to operate the inverter and supply power to an
appliance a suitable 12V DC power supply is required. This
can be a vehicle, boat or caravan battery, portable power
pack or an independent 12V lead acid battery. For most
applications, a deep cycle battery is recommended for best
BATTERY OPERATING TIME
The typical vehicle battery has a minimum operating time
of 1 to 2 hours, depending on the current use of the load
being driven and the size of the battery. We recommend that
the operator start the vehicle every hour to recharge the
battery system. This will prevent unexpected shut downs of
equipment and will ensure that there is always sufficient
battery capacity to start the engine.
PLACEMENT OF THE INVERTER
For best operating results, the 8ZED inverter should be
placed on a flat surface, such as the floor or seat of the
vehicle. The inverter should only be used in locations that
meet the following requirements:
A.) DRY – Keep away from water. Do not allow water to
drip or splash on the 8ZED Inverter.
B.) COOL – Ideal ambient air temperature should be
between 10 degrees and 33 degrees C (50 degrees and
90 degrees F). Do not place the inverter on or near a
heating vent or any piece of equipment which is
generating heat above room temperature. If avoidable,
do not place the inverter in direct sunlight.
C.) VENTILATED – Allow at least two inches of
clearance around the 8ZED Inverter for air flow. Do
not place anything on or over the inverter during
operation. Make sure that the air is allowed to circulate
freely around the unit.
D.) SAFETY – Do not use the 8ZED Inverter near
flammable materials or in any location which may
accumulate flammable fumes or gases, such as the
battery compartment of your car, truck, RV or boat.
This product is not suitable for use while travelling
using battery clamps. The length of the wire cables and
battery clamps are not designed for this operation. If
you wish to operate the 8ZED inverter while moving,
it must be permanently mounted and wired.
CONNECTING TO THE POWER SOURCE
CAUTION: Before making any connections ensure
inverter is switched off and has no AC appliances plugged
into the AC output sockets.
• Connect the ring terminal on the negative lead (Black)
to the negative (Black) DC terminal on the back of the
• Connect the battery clip (Black) or ring terminal on the
other end of the lead to the negative DC supply or (-)
• Connect the ring terminal on the positive lead (Red) to
the positive (Red) DC terminal on the back of the
• Connect the battery clip (Red) or ring terminal on the
other end of the lead to the positive DC supply or (+)
FIGURE 1- Loosen the caps on the terminals and slide the
lugs between the cap and the base. Then tighten firmly.
FIGURE 2- for the appropriate terminal connections.
“HARD WIRED” CONNECTION
When mounting the inverter in a vehicle, caravan, boat or
cabin it may be preferable to use longer DC battery cables
than those supplied, so that the inverter can be placed in a
more convenient, cooler or more protected location.
If longer cables are required only use suitably insulated
automotive battery cable according to the following table.
(AWG = American Wire Gauge)
It is recommended that a circuit breaker or high current fuse
be placed in the DC positive (+) line close to the battery.
breakers size (+)
(or 2x 150A
2x 200 AMP
2x 250 AMP
It is also recommended that a heavy duty battery switch with
a current rating higher than the fuse (or combined fuses) be
fitted in the DC positive (+) line close to the battery to allow
the supply to the inverter to be switched off, this can also be
achieved by using a circuit breaker which has a trip facility.
Positive and negative cables should be run close together to
reduce cable inductance, and be protected from damage by
The chassis ground lug must be connected to a grounding
point. In a vehicle, connect the chassis ground lug to the
vehicle’s chassis. In a boat connect to the grounding system
of the boat. In a fixed location connect to the ground.
Most electrical tools, appliances and audio/video
equipment have a label indicating power consumption in
amps or watts. Add up the power consumption in those items
you will be using simultaneously, keeping total below the
8ZED Inverter size. If the power consumption is rated in
amps, multiply by the AC volts (220/230/240) to determine
the wattage. For example, a television rated at 0.9 amps will
use approx 99 watts. For more information regarding the
typical wattage draws of many appliances, refer to 8zed.com.
Resistive loads, such as incandescent lights, are the easiest
for the inverter to drive, though larger resistive loads, such as
electric stoves or heaters, require more power. Please make
sure you choose the right 8ZED Inverter to suit the
application you need in order to power the appliance
continuously. Inductive loads, such as TV’s and stereos (any
device with a coil or a transformer in it) require more current
to operate than a resistive load of the same power rating.
Induction motors (motors without brushes), as well as some
televisions, may require 2 to 6 times their power rating to
start up. This condition may require repeated “ON/OFF,
ON/OFF, ON/OFF” switching of the power switch on your
8ZED Inverter in order to get them started. The most
demanding are those that start under load, i.e. compressors
and pumps. Since motor and television characteristics vary
widely, only experimentation will determine if a specific load
can be started and how long it can be run.
There are no standards for “surge power” partly because it
can not be simply represented by a single sample number.
Though our 8ZED Inverters can provide power up to 6000W
(depending on the unit you purchase) for a short period,
experimentation is the only method of determining whether it
can handle the surges generated by a particular load.
IMPORTANT NOTE: The 8ZED 120W to 1200W
Inverters won’t operate most appliances designed to produce
heat such as hair dryers, coffee makers, irons, heaters and
toasters. The current use of most of these exceeds 1200 watts,
far beyond the capacity of the units listed above. The inverter
may be used either while the engine is running or turned off.
However, the inverter may not operate while the engine is
starting, since the battery voltage can drop substantially
during engine cranking. The 8ZED Inverter draws less than
1.3 ampere from the battery when it is not supplying power
to the load. In most cases, the 8ZED Inverter may be left
connected to the battery when it is not in use, since it draws
so little current. If the vehicle will not be used for several
days, disconnect the 8ZED Inverter from the battery.
CONNECTING APPLIANCE &
• Connect the appliance AC plug to the inverter AC
• Switch the inverter “ON”, the Green power light will
illuminate to indicate operation.
• Turn the appliance “ON”, if the appliance is fitted with
an “On/Off” switch always switch the inverter on
before switching the appliance on and always turn the
appliance off before switching the inverter off.
• When not in use turn the inverter off.
LOW BATTERY ALARM
An alarm will sound when the voltage of the battery drops
to 10.5 volts. This indicates that the battery requires
recharging. The user should stop operations at this time,
since the 8ZED Inverter will shut down automatically when
battery voltage drops to 10.0 volts.
If the low battery alarm sounds when the battery is fully
charged, follow these steps for correcting the lack of output
power: Reduce the load on the inverter and keep the voltage
above 11.5 volts to maintain regulation. The alarm will sound
when the inverter is overloaded, or if there is an excessive
voltage drop between the battery and the inverter.
NOTE: The alarm may sound momentarily when the unit is
being connected to, or disconnected from, the power source.
This is normal and does not indicate any problem.
INDICATORS AND CONTROLS
Your 8ZED Inverter circuitry constantly monitors the
following hazardous conditions:
A.) Low Battery Voltage – This condition is not harmful to
the inverter, but could damage the power source. An
audible alarm is sounded when input voltage drops to
10.5 volts. When the condition is corrected (i.e.
alternator charges battery) the unit may be restarted.
B.) Short Circuit - Reverse polarity or short circuit
condition of the load will usually result in opening of
the short circuit protection and blowing the three 35
C.) High Temperature – When the temperature of the
internal heat sinks reaches 66 degrees C (150 degrees
F), the solid state temperature sensor located in the
8ZED Inverter will automatically shut down the unit.
Once it is allowed to cool, it may be restarted.
TROUBLESHOOTING GUIDE / FAQ
Q. The inverter will not run my appliance even though
the listed power is less than the inverter size
A. Electrical appliances can be separated into three loads
by the way they draw energy (current) from their power
supply. These loads are “Resistive”, “Inductive” and
“Capacitive” appliances. Some appliances may draw all three
types of power, in which case all should be considered.
• Resistive Loads such as normal incandescent lights
(wire filament) always draw a constant power (watts)
from the power supply, that is a 100 Watt light will draw
approximately 100 Watts from the power supply at all
times. Resistive loads are the easiest appliances for an
inverter to run.
• Inductive Loads such as a fridge (electric motor) require
a large rush of power (surge current) to start and then
usually draw a more constant power once running.
Inductive loads contain coils of wire (motors,
transformers, ballasts, solenoids). When the power is
first turned on these coils of wire draw a large surge
current which forms the magnetic flux which allows
these appliances to work. The magnetic flux is a kind of
stored energy. Most common inductive appliances are:
fridges, air compressors, transformers, pumps, power
tools & fluorescent lights. These appliances can draw 2-6
times their normal running power to start up. To run a
200 Watt fridge you may need a 600 to 1200 Watt 8ZED
• Capacitive Loads such as TV’s may require a large
surge current to start only when they have not been used
for a while. This is often due to large capacitors in the
power supply that must be quickly charged when the
appliance is turned on. If the appliance is not used for a
few days these capacitors slowly go flat. Resetting the
inverter a couple of times may allow these appliances to
• Some appliances such as large fridges, air conditioners
and other pump driven appliances have extremely high
start up currents, because they have an inductive motor
that must start under load. These appliances are not
recommended for use with an inverter. They should be
powered by an engine driven generator.
Q. Why is it important to make sure that the battery
leads are not connected back to front?
A. The 8ZED inverter uses highly developed electronics to
convert DC battery power to AC mains power. If you
accidentally connect the inverter to the battery incorrectly a
large current will be drawn by the inverter which will blow
the protection fuses, as this occurs some of the high current
could damage the sensitive electronic components. Because
of this risk it is important to always double-check the battery
polarity before making any connections.
Q. Why do some power tools not work properly?
A. Some newer power tools use PWM variable speed
controllers to vary the tool’s speed as the trigger is squeezed.
These power tools switch the power on and off very quickly
in a similar way to how the inverter works. Because of this,
some may not function properly with the inverter’s modified
sine wave output.
Q. Can I connect lights with dimmers to the inverter?
A. Older light dimmers may function fine but most newer
light dimming circuits are designed for household sine wave
AC power, these may not work properly with modified sine
For more inverter FAQ’s, visit 8ZED.com