Originally Posted by
Dave H
Your 208B charging a 4S provides a good example of required power supply voltage. Assuming for the moment you and your lipos are OK with going to 11, the charger can output 20 amps into a 4S, peak of 336 watts (20A x 16.8V max).
336 is below the 350W charger rating, but wait, check the chart on the bottom of page 10 in the manual. To achieve the 336W output requires a power supply of just over 15.5V.
On a true 12V power supply the 208B is limited to just over 250W of output, or around 14.9 amps for a 4S. On a typical 13.8V bench supply around 290W, or just over 17 amps.
For 2S the power limits probably wouldn't matter, as you would be current limited by the 20A. But if you had a 8S helicopter, then that extra power would really come in handy.
I would like to have my 3 chargers all operate off the one power supply(2 in series).I know I probably won't need full amperage to all at once,but i want to have headroom just in case.
The kicker is......
my team orion clubman charger ,12-15VDC input
thunder power 11-18VDC input
icharger 4.5-32VDC input
so 24 VDC won't be ok for 2 out of 3
That's why I'm curios about running 12v and 24v off the 2 psu's in series.
or should I just get a 3rd psu for the clubman and thunder (14.8v would be nice)
just a thought!