Power supply voltage adjustment

[Trex3940]

Hi guys,

I'm now confused about the logic of power supplies and chargers.

I have an efuel 1200 watt 60amp power supply (PSU) and a Powerlab 6 1000 watt 40 amp charger.

1) What is the reason for the voltage adjuster on the PSU between 15-24V?
2) Surely if I select 24V on PSU, my amperage will drop meaning the output power to the PL6 is going to be less?
3) I don't understand the logic of what power is derived from what? Does the PL6 receive the watts volts and amps from PSU and then PL6 outputs it's own power to output amperage for charging the lipo?

Hope this makes sense

J

[rcflyerheli]

It's simple. Power (watts) = voltage x amps. So as you increase the voltage on the power supply, the amount of amps that you need to draw will decrease for given charge power. Remember, the 1200 watts is just the max the PS is designed to deliver. In typical use you will not be loading the charger up that much, so you won't be drawing that much power from the PS.

1200w = 24v x 50a
1200w = 12v x 100a

If your charger is limited to "X" number of amps on its output, then you can get more power out of it by increasing the voltage. It also works the same on the input from your wall plug to the PS. Since you run 240 volts there in England, the amps it will take to give you your 1200 watts will be much lower than they will be here in the US where we run 110 volts.

Hope this helps.