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-   -   Recommend a power supply. (https://www.rctech.net/forum/radio-electronics/796087-recommend-power-supply.html)

1967Typhoon 02-26-2014 01:42 PM


Originally Posted by King DORK (Post 13045951)
Thanks for the info guys. I have no intention of using the Ofna ps with this charger. Hoese, what differences do you see between the Fantom ps and the Maxamps? They're both 575watt/47amp, so other than the 2 sets of bullet plugs are there any other significant differences? Price is neither here nor there between the two. I do like Fantom stuff.

They are both the same supply underneath the skin. They are both made by the same third-party supplier from what I know.

Pick which sticker you like and go for it. :nod:

King DORK 02-26-2014 02:37 PM


Originally Posted by 1967Typhoon (Post 13045963)
Pick which sticker you like and go for it. :nod:

Haha! That's what I thought it would come down to. Thanks again for all of your help guys. You went above and beyond a simple "just get this" answer. I feel confident making a decision now.

Dave H 02-26-2014 03:17 PM


Originally Posted by 1967Typhoon (Post 13045882)
Right. But you also need to calculate total WATTAGE. Total wattage with both his big batteries at 2C would be:

Channel 1 - 14.4amps x 8.4v= 120.96 watts
Channel 2 - 14.4amps x 8.4v= 120.96 watts
TOTAL WATTS= 241.92

Then you add in some overhead for the charger, and also for safety. So in total he needs a power supply capable of sustaining a load that is about 15 amps and 260-270 watts at 12V or greater. I don't think his Ofna will put out 260-270 watts. Maybe 200. Maybe.

Perhaps a typo, but it takes more than 15 amps at 12V to get 270 watts. More like 22.5A or better. I'd second having a little more even, assuming 90 to 93% charger efficiency is cutting it fairly tight.

Dave H 02-26-2014 03:24 PM


Originally Posted by Hoese37 (Post 13045864)
Wouldn't be a total of 28.8A coming from the PS tho. The charger is getting 14v pumped in, and is only pushing out half. Youre really only using half that, so 14.4A total.

A 2S will be a fair bit above half of even 14V (with the Ofna turned up, something I didn't see clearly mentioned) for virtually all of the charge time. And as Typhoon points out doesn't account for the power the charger needs to operate. 14.4A isn't nearly enough.

Seether 02-26-2014 11:08 PM

http://www.ebay.com/itm/Power-Supply...=item4aca145a5

$40 shipped all you need will charge 4 4s 5000mac at 1c

I own 3 same as max amps for 1/3 price

King DORK 02-27-2014 05:06 AM


Originally Posted by Seether (Post 13047400)
http://www.ebay.com/itm/Power-Supply...=item4aca145a5

$40 shipped all you need will charge 4 4s 5000mac at 1c

I own 3 same as max amps for 1/3 price

Thanks. I'll be scanning eBay later. I am somewhat artistic and wouldn't mind making one all sexy :sneaky:.

jnslprd 02-27-2014 09:34 AM

http://rivergatedist.com/bulldog_45_amp.htm

Old school champ,last one you will ever buy.

My 10 year old 30 amp runs stuff that makes the protek 40 amp struggle.

Great price also in the link above, pretty sure I paid more for my used 30 amp.

Kbmoss 02-27-2014 05:53 PM


Originally Posted by Seether (Post 13047400)
http://www.ebay.com/itm/Power-Supply...=item4aca145a5

$40 shipped all you need will charge 4 4s 5000mac at 1c

I own 3 same as max amps for 1/3 price

The server power supplies are the way to go. I made one a few years back. It wasn't hard to do but just paying a bit extra for someone else to do it is better. I use mine with a quad charger as well and the supply doesn't even blink an eye to max out the charger charging 4 lipos at 6 amps each.

Fegbri46 02-27-2014 06:30 PM

If u are spending that much I would go with a power lab 6!! I got one with the MPA and this psu
http://www.solidhobby.com/Power12-12...upply_p_9.html

It has switch to turn on and off instead of just plugging in. And u get $30 off if u order the set. Do your research and this is one of the best out there!!

http://www.solidhobby.com/Cellpro-Po...UIM3_p_25.html

It does EVERYTHING you will ever want to.

mbykerman 02-27-2014 08:00 PM

I have the Hitec charger and a psu power supply 750 watts. I have charge 2 7200 mah batteries at 20amps and run my tire warmer at the same time with no problem. Each side of charger was pulling 20 amps per the led screen and tire warmer was keeping tires at a nice 70°f.

King DORK 02-28-2014 11:49 AM

Thanks for everyone's suggestions and knowledge. I ended up getting one of the 575watt/47amp supplies off of someone on ebay. Should be here in the next day or two, along with my charger. Thanks again.

xps800doo 10-13-2015 04:34 PM

Time to revive this!
 
I am going to be running 4 of these http://www.buddyrc.com/sky-rc-ultimate-400w-20a-balance-charger.html

I need a power supply I like the 12v fantom but will that be enough? Otherwise also like the Chargery s1500 http://www.buddyrc.com/chargery-s1500-1500w-dc10-25v-power-supply.html

I am charging 2s and 1s batteries most I ever charge at it 2c! I run 7800mah 1s, 6400mah 2s.

I have 2 chargers set up for 2s and 2 for 1s I only ever charge 1 battery per charger at the track...

Thoughts on the two options?

Dave H 10-13-2015 05:26 PM


Originally Posted by xps800doo (Post 14222222)
I am going to be running 4 of these http://www.buddyrc.com/sky-rc-ultima...e-charger.html

I need a power supply I like the 12v fantom but will that be enough? Otherwise also like the Chargery s1500 http://www.buddyrc.com/chargery-s150...er-supply.html

I am charging 2s and 1s batteries most I ever charge at it 2c! I run 7800mah 1s, 6400mah 2s.

I have 2 chargers set up for 2s and 2 for 1s I only ever charge 1 battery per charger at the track...

Thoughts on the two options?

The Fantom should be just about right for what you are asking of it. Assuming a mildly conservative 80% charger efficiency around 36 amps is needed from a 12V supply with all 4 chargers going as described. Leaving a little more than 20% of power supply headroom.

If you do consider the Chargery unit in case of future needs etc, be sure to not turn it up past 18 volts with those chargers.

tsair 10-18-2015 11:28 PM

Dumb question, but when you guys plug these chargers in at home and are drawing 30 or 40amps, you have to make sure the house circuit that is providing the juice from the panel also has a 30 or 40amp breaker on it, right?

wingracer 10-19-2015 03:19 AM

No. With 120V, you will pull a lot less amps.


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