Originally Posted by
J-Force
a few more queries...
what relation/effect has the charger's wattage (180w / port) to the charging?
i'm using Muchmore PS 24A, would you think that is enough for the duo3? i used to charge 2 4s packs at the same time..
also, if the 5400mah 4s 50c pack is being charged at 5.5a but at the rate of 2c instead of 1c, what would be the effect?
thanks so much guys
The 180 Watt power relates to a combination of how fast you could
potentially charge the battery, and how large of a battery. Depends on the settings you use, if you set it at 5 Amps for example the extra power wouldn’t be used or reduce time. But it does allow you to use a higher charge rate if your batteries allow and you have enough supply to it.
Amps x Volts = Watts
Some examples for your case:
1C: 5.4 Amps x 16.8 Volts = 90.72 Watts (16.8V being the full charge for a 4S)
2C: 10.8 Amps x 16.8 Volts = 181.44 Watts (which a Duo can’t quite do with one port, but close)
Assuming the Muchmore supply is the typical 13.8 Volts, it’s capable of about 330 Watts. Need to reduce this to account for charger efficiency and allow some headroom, I’d recommend figuring on about 250 Watts of charge power at most for reliable operation, proportionally lower if it’s really a 12V supply. This needs to be split for the 2 ports of the Duo. So you could charge two 4S at a little over 7 Amps each with this supply.
250 Watts / 2 ports = 125 Watts per port
125 Watts / 16.8 Volts = ~7.4 amps
Perhaps a little over 6 Amps per if it's a 12 Volt supply.