iCharger 308DUO Power Supply Choices
#16
Tech Champion
Volts x Amps = Watts
4S (2 x 16.8V) x 30A charge (15A ea) = 1008W
Charger is good for 800W/channel so np there.
With efficiency losses, a 24V power supply setup is what the OP would need if he wants to have these kind of charge rates. Even then, he's getting close to his limit IMO.
4S (2 x 16.8V) x 30A charge (15A ea) = 1008W
Charger is good for 800W/channel so np there.
With efficiency losses, a 24V power supply setup is what the OP would need if he wants to have these kind of charge rates. Even then, he's getting close to his limit IMO.
#19
Tech Master
iTrader: (17)
And I see the 308Duo is rated for 800W output, so yes, it is capable.
But wouldn't charging 2 of these lipos require a PSU of over 1000W?
If charging one 4S @ 30A consumes 504W needed from the PSU (16.8V x 30 amps),
how could charging 2 of them only required the same wattage?
Or are we talking about 2 different things?
Last edited by Yosh70; 12-25-2014 at 10:28 AM.
#21
Tech Champion
Thats what I thought initially but if one 4S was charged @ 30 amps, 504W is needed (16.8V x 30 amps).....so if you're charging 2 4S lipos, still only 504W is needed?
Don't you have to double the output (60A) to charge both 4S packs @30A or are you talking about a 30A charge which would give each lipo 15A?
Don't you have to double the output (60A) to charge both 4S packs @30A or are you talking about a 30A charge which would give each lipo 15A?
#24
charger
The server power supply you got will work just fine you don't need 24 volts to charge 3 volt cells most of them say right on the box now don't use with 24 volts check the manual or go to progressiverc and watch there video they will explain it don't get caught up in you need this and that. What you got is just fine if you got a 12 volt server power supply at 47 amps . Look at the screen at the bottom while it's charging at 20 amp charge it's only pulling like 12 to 14 amps
Last edited by stevecox1957; 12-26-2014 at 03:00 AM.
#26
R/C Tech Elite Member
iTrader: (40)
Not to split hairs, but 4s packs are 14.8 volts correct?
I still say go with the 24 volt, you can utilize the extra power to run other things using something like this: http://www.tqrcracing.com/shop/produ....asp?p_id=9643
I still say go with the 24 volt, you can utilize the extra power to run other things using something like this: http://www.tqrcracing.com/shop/produ....asp?p_id=9643
#27
Tech Champion
The nominal voltage of a 4S lipo is 14.8 volts, but the majority of the charge cycle will be above that value and will reach a maximum of 16.8 volts. Nominal voltage is an approximation of the voltage during discharge, not so useful for charging calculations.
While extra power is highly desirable for the reliability of the power supply, MeanWell recommends 30% extra for example, how many typical RC accessories can use 24V?
While extra power is highly desirable for the reliability of the power supply, MeanWell recommends 30% extra for example, how many typical RC accessories can use 24V?
#28
power supply
We I guess that sence I had owned almost ever charger that icharger makes and charge my boat battery which are 6 cell and charge them both at the same time on a 12 .6 volt server power supply at 8 amps per pack and have been doing it for well over a year now and never had one problem I must need 24 volts. Now if Yost70 could explain to me the the reason for 24 volt system I would gladly past that on to the number of customers we have that run 24 volts and one guy comes in cussing the charger and has had 5 chargers I would like to get him in touch with you guys I am sure he could learn a great bit of info from this page. I will sure have him to post up and explain just how it works lmao. I have told him before if the charger would not work at 12 6 then why does it say from 10 to 30 on some directions I guess that 10 will not work either and how could you possibly charge 4 or 5 packs on the same plug at 3.7 volt per cell that would be impossible I guess but it's happening ever day . This guy has sent 5 back so far and still cussing the charger he would fit in well here.
#29
Tech Master
iTrader: (17)
We I guess that sence I had owned almost ever charger that icharger makes and charge my boat battery which are 6 cell and charge them both at the same time on a 12 .6 volt server power supply at 8 amps per pack and have been doing it for well over a year now and never had one problem I must need 24 volts. Now if Yost70 could explain to me the the reason for 24 volt system I would gladly past that on to the number of customers we have that run 24 volts and one guy comes in cussing the charger and has had 5 chargers I would like to get him in touch with you guys I am sure he could learn a great bit of info from this page. I will sure have him to post up and explain just how it works lmao. I have told him before if the charger would not work at 12 6 then why does it say from 10 to 30 on some directions I guess that 10 will not work either and how could you possibly charge 4 or 5 packs on the same plug at 3.7 volt per cell that would be impossible I guess but it's happening ever day . This guy has sent 5 back so far and still cussing the charger he would fit in well here.
2 posts on this thread and most of your statements are incoherent, very confusing.
#30
What I am trying to tell you is that almost ever customer we have that uses 24 volt power supply on a I charger has had issues with it and I have yet to see a battery that it will not charge on 12.6 volts does that make sence to you .