Originally Posted by spad
O.K., just to muddy the water: since the PL 6 and 8 are far more than chargers, and each will operate with less than 40 amps just fine, you can start with a "cheap" power supply and survey for your needs! Sum: you don't need 1200 watts to use either, just enough watts for your intended use!
Actually, this is exactly why we put what we term Smart Power Management into the PowerLab series. One of the first things we discuss and reference a number of times in the user guide is the importance of setting the input current limit to protect your power supply. Set this number a little lower than the max rating of your PSU, the PL will never draw more than what you tell it, regardless of where the output charge current is set. We knew people would want to use a wide range and quality of power supplies, and we wanted to make it easy for them. Smart Power Management stores profile settings for a power supply as well as an input Pb battery. Then it asks you one time which one your using on startup.