CAUTION:
The SI-750HP 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.
4.2 CONNECTION TO POWER SOURCE
The SI-750HP comes equipped with battery clip cables for connection to the
power source:
CAUTION:
Do not use with positive ground electrical systems (the majority
of modern automobiles, RVs, and trucks are negative ground).
To operate at full 750 watts output, either use the battery clip cable (supplied) or
directly wire to the power source with user supplied wire and fuse. Use wire
#4AWG for lengths of four feet or less and #2 AWG for lengths to 12 feet.
CAUTION:
Reverse polarity connection will result in a blown fuse and may
cause permanent damage to the inverter.
Connecting to a Power Source Using Provided Cables:
Use the provided cables to connect the SI-750HP directly to the 12 volt power
source using the following guidelines:
1. Check to be sure the SI-750HP power switch is turned off and that no
flammable fumes are present.
2. Connect the black cable to the black post marked “(-)” on the back of the
inverter. Connect the battery clip to the negative terminal of the battery.
3. Connect the red cable to the red post marked “(+)” on the back of the
inverter. Connect the battery clip to the positive terminal of the battery.
4. Check to be sure that all connections between battery clips and terminals
are secure.
Direct Hardwiring to Power Source:
Use #4 AWG wire if the inverter to power source connection is 4 feet or less. For
wire run of 4-12ft. use #2 AWG wire.
In either case, protect the positive (+)
wire from shorts by installing a 150 to 200 Amp fuse or circuit breaker
close to the DC power source (battery) terminal.
7.
5. OPERATING TIPS
5.1 RATED VERSUS ACTUAL CURRENT DRAW OF EQUIPMENT
Most electrical tools, appliances and audio/video equipment have labels that
indicate the power consumption in amps or watts. Be sure that the power
consumption of the item you wish to operate is rated at 750 watts or less (If
the power consumption is rated in amps AC, simply multiply by the AC volts
(115) to determine the wattage). The inverter has overload protection, so it
is safe to try to operate equipment rated at 750 watts or less. The inverter
will shut down if it is overloaded. The overload must be removed before the
inverter will restart. Resistive loads are the easiest for the SI-750HP to run.
However, larger resistive loads, such as electric stoves or heaters, usually
require more wattage than the SI-750HP can deliver on a continuous basis.
Inductive loads, such as TV’s and stereos, require more current to operate
than do resistive loads of the same wattage rating. Induction motors, as well
as some televisions, may require 2 to 6 times their wattage rating to start
up. The most demanding in this category are those that start under load,
such as compressors and pumps. Testing is the only definitive way to deter-
mine whether a specific load can be started and how long it can run. The unit
will simply shut down if it is overloaded. To restart the unit after a shutdown
due to overloading, remove the overload.
CAUTION:
This inverter will not operate high wattage appliances or equip-
ment that produce heat, such as hair dryers, microwave ovens, and
toasters.
5.2 BATTERY OPERATING TIME
The SI-750HP will draw approx. 75 Amps when delivering its full rated power
of 750 Watts. Multiplying his by the hours of operation will indicate the power
required in Ampere Hours. The battery capacity is normally indicated in
Ampere Hours.
Use a Deep Cycle battery when using this inverter.
The
Ampere Hour Capacity of the battery should be approximately 2 times the
Ampere Hours required by the Inverter. Considering that the full 750 Watts
of power is drawn from the inverter for 2 hours, the power required by the
inverter will be 75A x 2 hours = 150 Ampere Hours. Use a battery with
capacity of 2 x 150 = 300 Ampere Hours.
10.
