Charger

1

1958 greyhound

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May 13, 2017
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How would i charge a 4s80p pack without solar?



--updated--
Can I run a standard 12 volt battery charger thru a solar controller?
This is a no no, solar will limit current and a power supply will just ram max volts and current.
A solar controller is just a on off switch that will pulse to get the needed voltage.
a power supply will burn a cheap controller out and a expensive controller that has current limiting will over work burn the power supply out.
 
No a Lead acid will keep a trickle charge going when it senses full. Get a Li-ion Charger like a Imax B4 or a lipo charger (same voltage) to run off of House power. they are cell selectable for 1-6s usually
 
You could since the battery charger will charge about 14V (4cell * 3.7 = 14.8V)

However, the 12V charger won't charge with the proper charge curve for Lithiums, which need two phases of charging, first CC (Constant Current) then at CV (Constant Voltage). A standard 12V charger will charge at CC/CV rather than switching part way through.

Added: jdeadman, yeah I forgot about the trickle effect. That really kicks this idea out
 
So a lead acid thru a solar controler wont work.

I have a imax b6, but there 6 amps.
Can i use more than 1 in parallel?

Realy looking for 20-60 amps.

I dont need something that will full charge, just to bulk charge them using a generator.
 
Use random DC power supply or get your self for instance an iCharger or other larger RC charger. iCharger can do up to 70A charge ;)
 
I was looking at the 50 amp icharger.
And it still needs a power supply.
Will a battery charger work for the icharger power supply?

I cant find anything good about feeding a solar controler with a dc power supply, the controler will eat the power supply since its not current limiting.

I have a sbm100 and he said i could feed it with a constant current supply but im unable to find anything with big amps.
 
1958greyhound said:
I was looking at the 50 amp icharger.
And it still needs a power supply.
Will a battery charger work for the icharger power supply?

I cant find anything good about feeding a solar controler with a dc power supply, the controler will eat the power supply since its not current limiting.

I have a sbm100 and he said i could feed it with a constant current supply but im unable to find anything with big amps.
Click to expand...

I'd consider a second hand server power supply. 50 amp DC supplies are expensive new generally, but it's fairly easy to get 50a out of a lot of server power supplies for around $50 from ebay.

https://www.rcgroups.com/forums/showthread.php?1292514-How-to-convert-Server-Power-Supplies

edit ... eg of 100a @12v DC supply for $50
http://www.ebay.com/itm/HP-DL580-ML570G3-Redundant-Power-Supply-P-N-348114-B21-/281283013430
 
Normal server supply from a proper server. No ATX or something. They can easily do 50-120A. Many of them can be serie connected to 24v or 48v if you want.

30Euro is normal price for them 2nd hand.
 
1958greyhound said:
Neilmc i just bought one of them and the resistors to slow the fan down, Thanks
Click to expand...

Cool. Yeah a lot of them will run the fan on max by default when started outside of a server. If running at 50a output, slowing the fan should be fine.
 
1985 in terms of solar chargers so yes it is. But they will work against each other and one will shut of earlier than the other or even both at same time premature.

its in many cases adviced to set one charger to shut off a tiny bit earlier than the other one. I run 3 chargers at home to my main bank. (same principle to normal charging in general)
 
So what your saying is i could run 3 chargers, 1 set to 4.1v, next set to 4.05v and the last set to 4.0

And Imean battery chargers like icharge.
 
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