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8.2.3 Charging Depleted Batteries
The Power Pak is capable of starting up with depleted batteries.
For the 24VDC model, as long as the battery voltage does not drop below 20V, the Power Pak will be able to
charge the battery once qualified AC or DC inputs are present. This will only occur if the following conditions
are met once the battery voltage goes below 20 V:
● The Power Pak Switch on the front of the product is always kept in the "ON" position
● The Power Pak is always connected with the battery
Before the battery voltage goes below 18VDC, charging can be activated by turning the Power Pak Switch to
“Off”, then to “ON”. Once the voltage goes below 18VDC, if the switch is turned to OFF or the battery is
disconnected from the Power Pak, the Power Pak will not be able to charge the battery once again, because
the CPU loses memory during this process. To resume using the battery with the Power Pak, the voltage will
need to be brought back above 18VDC by other means, for example using a car charger.
8.2.4 Charging Current & Tips for Charging from a Generator
The charging power will peak around 3 seconds after charging begins. If charging from a generator, this may
cause the generator’s frequency to drop and cause the Power Pak to transfer to Inverter Mode, where power is
drawn from the batteries rather than the generator.
It is suggested to gradually ramp up the charging load when charging from a generator, by gradually
switching the Charge Current Control Switch, located next to the LEDs on the front of the Power Pak, from
min to max. Together with the Power Pak’s built-in 15s switch delay, this will give the generator enough time
to spin up. This will depend on the size of the generator and rate of charge.
The maximum charging current can be adjusted from 0% - 100% via a liner switch to the right of the Battery
Type Selector. Reducing the charging current may be helpful when charging a small capacity battery bank.
The liner switch can effectively reduce the max charging current to 20% of its peak.
Table 8.2.4
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