chamaleon PSU

[smiles]

Hi,guys
Have recently purchased a chamaleon isl6-330d charger for charging my flight power 3s 1p 1800mah lipo's and was planning to use my pro-peak 12v PSU to power it but having read the instructions it states that due to the chargers high power demand and the PSU's inadequate output capacity this may cause problems,long term damage and even terminal damage to the PSU and the charger.
Has anyone got this charger working of a PSU without any problems and if so which PSU is it.Also looking to upgrade my zoom 400 to a brushless motor and esc any tried and tested combinations i would be interested in hearing about them.

Best regards Smiles.

[Smoothound]

I run an Orbit and Schulze charger off a MAAS 25A PSU at the same time with no problems. Not the cheapest PSU available but they are reliable and stable

[MartinM]

Your PSU will be Ok to use as long as you don't pull more than the 20 amps, in fact, best to keep under 17 amps to be sure!

Below is a 'working mans guide' to working out the power taken to charge your battery keeping you on the safe side.

You will charge your battery at 1C = 1.8 amps, it is 3 cells so 11.1 volts but more like 12 volts when charging depending on how far you are into the charge so this value we can keep the same as the PSU. Lets say the charger is only 75% efficient, it may be more but keep it safe, 1.8/75*100 = 2.4amps so you are very safe.

If you only ever charge 3 cell packs it is easy to keep up with the power being used, as above BUT say you were charging a 6 cell Li-Po at 1.8 amps...

Call the voltage 24volts @ 1.8 amps = 43.2 watts of power, that makes 57 watts at 75% efficiency, 57/12=4.75 amps (watts /volts=amps)

The new t-Rex battery is 4.6 amp 6 cell, to charge at 4.6 amps it would take 12.5 amps

Just remember that as the cell count gets above 3, the amps just keep going up !!

[smiles]

cheers guys i called flightpower today and he gave me the same calcs so nomore exspense needed there then.

Smiles.