nitro_mt_racer

iTrader: (241)

My math is correct right?

Dave H

Yes, seems right. One more thing, please confirm your supply voltage if you can. Main reason I mention it is many so called '12V' bench supplies (not servers) mimic automotive batteries and are actually 13.6-13.8 volts or so.

nitro_mt_racer

iTrader: (241)

I will but I remember it being around 12.2v when I built it. Mines a converted server supply.

Socket

iTrader: (61)

They're adjustable as well. There is a pot in the supply that you can turn to turn up the output voltage.

DRTMI

iTrader: (27)

Depending on what supply you have.

nitro_mt_racer

iTrader: (241)

I just saw that in a recent article. I wrapped my power supply so I'm not going to worry about it for now. The lower voltage doesn't effect us anyway.

nitro_mt_racer

iTrader: (241)

So here's what I found out just now running these tests:

My ps checks 12.14v on the output but the 308duo shows that it's 12.326v as it's input voltage. Not sure why the difference unless my dvm is off.

Charging 1 4s pack at 30a it showed as high as 17.181v @ 24.73a = 425w

Charging 2 4s packs at 30a it showed 16.66v @ 18.87a & 16.59v @ 18.97a = 314w on each channel

This test doesn't change anything for me personally as we don't charge that high anyway nor do we ever charge 2 4s packs at the same time but it does change my recommendations for power supplies going forward depending on the end users requirements.

Dave H

Your results appear to confirm that charger power scales reasonably well with power supply voltage.

Thanks for taking the time to test and post the results.

Dan.J

iTrader: (21)

So it seems like most of these new high power chargers cut power output a bunch when using a 12V supply even if the 12V supply has plenty of amps. Are they all like this or is there a certain brand that can output more power on a 12V supply? My supply is 12V 75amp 900watt and works great for what I'm using it for but if I step up to a icharger or powerlab it looks like it will only do so much being 12V. Interesting thread.

dawgmeat

iTrader: (9)

Can the channel be programed independently of each other? example I have a SMC 7200 & SMC 6000. I charge my SMC 7200 on 1 channel but the lipo settings always carry over to the other channel, Can I save the different lipo setting for each channel?

freebird

iTrader: (3)

Yes.....

I dont charge my batteries to cutoff at mah. I set my cutoff to V/cl

dawgmeat

iTrader: (9)

Thanks

ISH

I place my order for the 308 duo yesterday. i still have not sorted out what i will do for power supply. I'm not entirely comfortable with the making my own even though it would be cheaper. i also don't like the way those computer supplies look. lol i wouldn't mind seeing some pictures of some of these charging station set ups.

I currently race off road 10th scale and mostly run shorty packs i will probably get a 1/8th scale in the coming months so being able to charge 4s will come into play. as much as i don't like the look of it the shuur speed power supply seems like it would do the job and is pretty inexpensive. is that an accurate assumption?

I know many of you use this charger to its full capacity and have 24v PS to meet that need. i will more than likely never charge above 15A on 4s 5000mah or 6000mah lipos.

thanks for any advise.

nitro_mt_racer

iTrader: (241)

Here's the one I made, just wrapped with a carbon fiber vinyl.

ISH

very nice.

i could live with something like that.