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SW1: Low Battery Trip Voltage
This allows the user to toggle the low battery trip voltage, which will shut down the Power Pak when the
batteries drop to this voltage. Position 0 is intended for a typical deep cycle lead acid battery. Position 1 is
intended for a normal cycle battery, and uses a higher trip voltage to prevent this type of battery from over-
discharging when there is only a small load applied. For Lithium batteries, use Position 1; in many cases the
lithium battery will shut itself down before the trip voltage is reached, especially if it has its own BMS (battery
management system).
SW2: AC Input Range
There are different acceptable AC input ranges for different kinds of loads. For some relatively sensitive
electronic devices, a narrow input range of 184-253VAC for 230VAC nominal (100-135VAC for 120VAC nominal)
is required to protect them. Use Position 0 for this type of load.
For some resistive loads a wide voltage range is acceptable. The input AC range can be toggled to 140-270VAC
(90-135V for 120VAC nominal) to power these types of loads with the most AC input power without frequent
switches to the battery bank. This setting can be useful when using “dirty” power from a generator as an AC
input. Use Position 1 for this case.
SW3: PowerSaver Auto Setting
In PowerSaver Mode, when SW3 is switched to Position 0, the Power Pak’s inverter will stay in standby. No
power from the batteries or solar panels will be supplied to power any AC loads that are connected. If a
qualified AC input is present, it will be used to charge the battery and supply the load at the same time.
When the SW3 is switched to Position 1, the Power Pak’s inverter is initially in standby mode and sends a pulse
to detect the presence of a load every 3 seconds. Each pulse lasts for 250ms. The inverter will remain in
standby mode until a load has been detected. Then it will wake up from standby mode and start to invert
electricity from the battery bank to power the load.
SW4: Output Frequency Setting
The output frequency of the inverter can be set at either 50Hz or 60Hz by SW4. When connected to an AC
input, the Power Pak’s output frequency setting must match the AC input frequency. For reference, 60Hz is
more common in North America and much of Central and South America, while 50Hz is more common in
most of the rest of the world.
SW5: Solar/AC Priority Setting
When Position 0 is selected, power from AC input is prioritized over solar or battery power. The AC input will
power any connected loads as well as charge the battery. Only once the AC input is stable, i.e. after the
generator/source has stabilized for a continuous period of 15 seconds, the Power Pak will start a battery
charging cycle to protect the battery. After 1 normal charging cycle, AC throughput will be restored and the
load will be powered by the AC input.
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