PowerSupply Help Needed.

[wade7575]

I'm looking getting the charger in the link and charging 4S Pack's with it,what I'm not sure on is a 4S Pack is 14.8 Volt's and I have seen PowerSupply's like the one LiPo Power sell's and I can see his put out 12.7 Volt's will the packs reach there rated 14.8 Volt's if I use a PowerSupply like that.

http://www.hobbyking.com/hobbyking/s..._Charger.html4


I was also wondering if someone can tell me if these Balance Board's are the right one's to order as I can see it olny comes with one. and I'll need 3 more.

http://www.hobbyking.com/hobbyking/s..._Adapter_.html

[Rich]

I have charged my 4s packs on a power supply that puts out 13.5 volts and 10 amps. What you have to look at is the wattage the power supply can put out. Since watts is volts x amps, my power supply puts out 13.5v x 10a =135 watts. Now lets say I have a 4s 5000mah pack that when fully charged reaches 16.8 volts. I charge it at 1c which would mean 5 amps. 16.87v x 5a = 84watts. This means that my power supply can handle it. The charger will convert the energy from the power supply as needed. So this would mean you don't have to have a high voltage power supply to charge high voltage lipos. As for the balance boards:
First off, what lipo brand are you going to use? Thunder power uses their balance plug while others use the jst-hx style (which I find to be more common in my opinion).

[wade7575]

I'm using Thunder Power Lipo's.

I have charged my 4s packs on a power supply that puts out 13.5 volts and 10 amps. What you have to look at is the wattage the power supply can put out. Since watts is volts x amps, my power supply puts out 13.5v x 10a =135 watts. Now lets say I have a 4s 5000mah pack that when fully charged reaches 16.8 volts. I charge it at 1c which would mean 5 amps. 16.87v x 5a = 84watts. This means that my power supply can handle it. The charger will convert the energy from the power supply as needed. So this would mean you don't have to have a high voltage power supply to charge high voltage lipos. As for the balance boards:
First off, what lipo brand are you going to use? Thunder power uses their balance plug while others use the jst-hx style (which I find to be more common in my opinion).

[Rich]

That would be the right balance board for it then.

[785boats]

But if you want to use that charger to charge 4 packs at once ( I assume that's why you bought it) then you are going to need a power supply that will deliver 4 x 5A. That's 20A total. Plus you want a bit of extra capacity in the PS to avoid over taxing it, so I would contact Lipo Power here on OSE & see about one of these. Although I don't have one it's a great price for what you get from what I can see.

http://forums.offshoreelectrics.com/...-HP&highlight=

All the best.
Paul.

[BHChieftain]

I use this one with my hyperion duo 3 charger-- supplies 23A

http://www.progressiverc.com/p350-power-supply.html

Chief

[LiPo Power]

20Amps if he would charge them at 5Amp each.
I have this charger and it is capable of charging 10Amp each port on the same time!
That would be 40Amps plus a little margin... And my power supply will juice this charger no problem...
Post # 2
http://forums.offshoreelectrics.com/......&highlight=

But if you want to use that charger to charge 4 packs at once ( I assume that's why you bought it) then you are going to need a power supply that will deliver 4 x 5A. That's 20A total. Plus you want a bit of extra capacity in the PS to avoid over taxing it, so I would contact Lipo Power here on OSE & see about one of these. Although I don't have one it's a great price for what you get from what I can see.

http://forums.offshoreelectrics.com/...-HP&highlight=

All the best.
Paul.

[wade7575]

I was talking to LiPo Power and I think I'm going to go with his HP 47 Amp Power Supply as I plan on hooking 2 charger's up to it and will need around 35 Amp's or so from the PowerSupply.

[oscarel]

But if you want to use that charger to charge 4 packs at once ( I assume that's why you bought it) then you are going to need a power supply that will deliver 4 x 5A. That's 20A total. Plus you want a bit of extra capacity in the PS to avoid over taxing it, so I would contact Lipo Power here on OSE & see about one of these. Although I don't have one it's a great price for what you get from what I can see.

http://forums.offshoreelectrics.com/...-HP&highlight=

All the best.
Paul.

To get 20A on the output side of the charger to 4S (4.2X4=16.8) X 20amps = 336watts/12.5v (power supply) = ~27amps from power supply. Is this correct???

[785boats]

Could be. But I'd contact Lipo Power if I were you. He would be able to advise you better than I. I don't go too deeply into the calcs just the basic amps plus a bit for headroom for me.
But as Robert stated in post #7, his power supply will easily charge 4 x 5000mah packs at 2C (10A each).
All the best.
Paul.