under the monitored battery power for about 2 weeks. Buy
charging the unit by day and running the distress signal by
night, it should be able to run indefinately.
Navagate to this screen in the programable
options mode to turn this option ON and OFF.
The state of this option is stored in the
systems permanent memory.
As discussed later in greater detail, the system has a real time
battery monitor that will try to prevent deep discharges on the
batteries. Although these deep discharges are permisable, they
will eventually damage the batteries and shoud be avoided in
normal operation.
The default condition is to have this monitor
turned on. Navagate to this screen in the
programable options mode to turn this option
ON and OFF. The state of this option is stored in the systems
permanent memory.
O
PERATION
Operation of the unit is simple. Use the three load switches to
separately turn ON or off the AC, DC or LED light devices.
Keeping the unused loads OFF will extend battery power by
lowering power drain.
Use the STBY/ON switch to turn on the enabled loads. This
switch will also always enable the USB power plug.
When using either the AUTOon or SLEEP modes, whatever loads
are enabled will turn on under the pre-programmed conditions.
The LED light can be turned on and off via its control switch,
and is useful as an emergency flashlight in situation such as
power outages. Another good use is to set the unit on a window
sill and use the AUTOon mode to turn on the light. So as the
sun goes down, your light comes on automatically.
The back-light on the LCD panel will time out after a few
seconds of non use. When this happens, the LED above the
STBY switch will also go into a flash mode.This will save battery
power and any activity on the switches will turn the lights back
on. If the lights are off, the first tap of the MENU button will
have no effect other to turn the lights back on.
It is important to realize that any power used from the batteries
needs to be replaced by recharging. For each amp of current
out, at least one amp of current must be put back in for the
same period. For example: If the AC out is used for a 60 watt
light bulb for an hour, that's about 5 amps for an hour or 5 AH.
When plugged in, about 2 amps of current is
available for recharging, in this case it will
take about 8 hours to fully recharge. This
screen shows the unit recharging from the AC plug with the
batteries at 13.4V, this voltage will increase to about 14.5V as
the batteries complete their charge.
If recharging with the solar panel, about
750mA is available, it could take up to 24
hours of direct sunlight for a full recharge
from a low battery state. This screen shows the unit recharging
from the solar panel with 415mA going into the batteries. The
unit can be moved and positioned toward the sun to maximze
the recharge current.
Maintaining full power with the solar panel requires a good
sunny day and continual reposition of the unit to face the sun.
This is true of any solar panel system and shows why it is
important to conserve power while using the system. Use the
LCD display to help you see how much power you are using.
The LED light uses about 350mA and can run for over 50 hours
on the batteries. Following is a chart that demonstrates how
battery life decreases as power drain increases.
M
AINTENANCE
• Before using this product, charge built-in battery under the
direct sunlight through solar panel or AC line cord.
• Keep in a dry environment.
• Keep away from Children.
• When not in use, the unit should be fully charged before
storage and the BATTERY switch put in the OFF position.
This will maximize storage time.
• The unit should be recharged twice a year, even if not used.
This will ensure that power is always available in an
emergency and provide maintenance to maiximize batery life.
• Although the unit needs to be placed in the sun, arrange it as
to minimize the heat around the unit. For example, place the
unit on a table or a box rather than on hot blacktop. Do not
keep the system in high temperature environment for
extended periods.
• Clean the unit with a soft cloth. Use window cleaner by
spraying first onto the cloth then wiping down the unit. Pay
special attention to keeping the solar cell clean
• DO NOT SPRAY LIQUID DIRECTLY ONTO THE UNIT.
• The Solar Panel is covered with a sheet of glass. IT WILL
BREAK IF STRUCK.
O
THER
I
TEMS
There is a regular type 5X20 mm cartridge fuse that will blow
instantly and prevent currents higher than 16 Amps on the
internal parts. This protects the wires, switches and others parts
from excessive current and heat.
On newer units, the BATTERY switch has been replaced by a
circuit breaker type switch. This has the added benifits of being
able to be reset without opening the unit. In addition, the circuit
breaker will add additional protection duniting the install/replace
batteries processes.
The AC inverter also has protection that will prevent more than
150 watts being drawn on it. This is approximately 12.5 Amps.
The DC circuit has a PTC type resettable fuse that is set for 8
Amps. This is a very slow type fuse, but if higher currents are
drawn fo a period of time, this fuse will trip. It will not effect the
other circuits and will self reset after a few minutes.
There is also a software based monitor that will automatically
remove loads should the current exceed about 13 Amps. This
monitor is provided to prevent the internal fuse from being
blown but it is not a fail safe like the internal fuse. High currents
cannot be drawn from the AC and DC circuits simultaneously. If
the unit drops to STBY, remove some of the power load and
then simply turn the STBY switch OFF and then ON again.
The system also monitors the battery voltage for low volts. The
AC inverter has its own protection and will switch off at about
10.5 volts. In this case it turns itself off.
There is also a software based battery monitor. This monitor will
measure voltage in relation to current to determine if the unit
should shut down. Using this battery monitor will ensure the
longest usable battery life. However, should you need to use
whatever power is available, such as in an emergency, this
monitor can be disabled in the programable mode menu as
detailed in the section titled NAVIGATING above.
8
Summary of Contents for OTG 15W
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