Hi,
You need to look at what watt (power) the charger can charge at.
From your specs:
Maximum charge power capacity: 300W@input voltage >18V (Per Channel)
Watt (w) = volts (v) x amps (a).
So if you are charging a 2s pack 8.4v at 300w, you would be charging at a rate of 300/8.4 = 35.7a
Or that is the max the charger could charge a 2s pack at.
The supply needed to charge at this rate, would need to supply 300w plus to the charger. Assume the supply is 12v.
So to give 300w the supply would need to give: 300/12 = 25a
So to charge at the max rate of the charger you would need a 25a (or greater to cover the losses in conversion) 12v supply.
That would be needed if you are going to use the charger at it's highest rate.
What would you be charging, ie what is the cell count (2s, 3s etc.) and what is the charge rate in amps you would like to charge at. Let me know and I can give you an idea of what supply you would need.
MiCk B. :-)
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