Charger selection help please

BFL13 wrote:
When you do the input vs output thing, the trick is to state the output with both DC volts and amps because you want the watts. If you do the same output amps at a higher voltage, that will suck more VA input from the 120v source.

So when they say 18 amps input required to do 125 amps out, what is the output voltage at the time? And for VA, what is the "120v" loaded voltage when the charger is running at whatever output watts they used?

MAXIMUM Output voltage during high current draw is determined by the absorption voltage setting. In bulk current is held constant and voltage rises until absorb is hit then current tapers. So worse case is 16v which is the max setting for absorb, which no one does, more like 14.3 such as mine.

14.3 * 125 = 1787.5 W

1787.5 / .87 (87% effcient) = 2054 W

2054 / 18 = 114V minimum

Also some info in their manual:

The MSH-M Series is equipped with a PFC (Power Factor Corrected) and PI (Proportional-Integral)
multi-stage battery charger. The PFC feature controls the amount of power used to charge the
batteries to obtain a power factor as close as possible to 1 (or unity). This causes the battery charger
to look like a resistor to the line (forces the charge current wave shape to mirror the voltage wave
shape). The PI feature allows the charger voltage and current to change independently. These two
features maximize the real power available from the AC power source (i.e., shorepower or generator),
which translates into less power wasted and greater charging capabilities than most chargers today.