Looking at running power for chargers in my trailer. I have three work stations that I would like to power. Say three DUO dual chargers. Going to mounth the power supply and run the wire to the station thru the walls and mount a plug.

Depending on which Duo models, and what cell size and current you plan on charging, including possible future needs, that could end up taking a substantial power supply.

But it all starts with the charging needs/uses. What Duo models (Hyperions?), and what are you trying to charge, what rates, etc?

I would use a bulldog style dc power supply and mount 4mm jacks at the pit spaces. You must make sure you are appropriately fused! I have seen a trailer wired like this and it works very well keeping the pits tidy

How about just running 110V to the pit spaces and then using individual power supplies? I guess I'd be a little paranoid running all my chargers from 1 power supply. What happens if that supply takes a crap on you? Now all 3 of you are out of luck.

I'm in the process of wiring up my 20' enclosed trailer for the same purpose but I'm just going to run 110v to each of the 5 pit spaces.

Lets just use the EOS 0615i DUO3, this is mostly what we use. There will be some lipo's charged too.

Do you have a link to a bulldog PS?

Trailer is already wired for 110, this will cut down on clutter and make things simple. I will keep the old PS for a backup stored in a cabinet.

If all Hyperion DUOs, I strongly recommend going with a 24 to 28 volt power supply. To reduce current requirements and power losses on the long runs between power supply and chargers, enable full power capability of the Duos, and help them run cool and reliable. Downside is it's not available for any other possible 12-13.8V needs of course.

Also strongly recommend using a supply with Power Factor Correction (PFC or APFC) to avoid excessive current requirements going to the supply. Otherwise at these high power levels the current can quickly become too much for a typical 110-120V circuit, or what otherwise appears to be a sufficiently powered generator. Most big supplies (>=1.5kW or so) will have this feature, as it becomes increasingly important at high power.

Assuming Hyp Duo 3 full power levels (not the higher power 3+), Hyperion specifies at least 450 watts per charger, or 1350W for three. Virtually every power supply manufacturer recommends some extra, typically about 30%, for headroom for reliability, handle surges, etc. Some ~1750 watts. At this level of power a 240V input is generally required for the power supply, again due to the limits of a 110-120V circuit.

Of course if you don't plan on using full charger power, or all channels simultaneously, including in the future, this can be down rated accordingly. Why the exact charging needs are important, unless you want full boogie power and are willing/capable of providing 240V power. Perhaps from a generator? If down rated one needs to remember and work within the limitations of course.

Assuming full power, something like this little puppy should do the trick:

MeanWell RSP-2000 Power Supply

If I understand you correctly, you are going to run 110 to the tables. Are your tables in the trailer going to be tore down at each event or left up? If left up, I would suggest mounting the power supplies to the bottom of each table and then setting up your plugs as needed.

I'm looking to mount one PS and run plugs for the chargers to plug into.. I plan to put a set by each plug in the pic. The wires will be hidden. It's hard to see but there are three outlets running down the left wall.

I couldn't find a price on that meanwell ps that Dave mentioned but I'm sure it's pricey. If money's not an object then I think your plan is great. If you're on a budget, then I'd go back to my original comment and just use the individual power supplies at each pit. The only clutter would be an individual ps at each stall.

here http://www.rivergatedist.com/PowerSupply.htm
I personally carry one of these around with me:
APS55
740 Watt

Cost: $278.40
Cost with IQ4 module internal: $327.90
Warranty: 3 year

Power Supply Features:
- Switching Power Supply
- Full Output at all Times
- Marine Ready
- Only Two Different Case Sizes
- The Professionals Choice Worldwide

Download FAQ Sheet
PART: APS55
Dimensions: 7.5" x 6.5" x 3.5"

http://www.cascadeaudio.com/power_co...converters.htm

I would get 2 of these & mount them under the counter.
http://www.feathermerchantrc.com/

Certainly not inexpensive compared to the typical hobby supply, but 3 units of comparable performance bought new likely won’t be cheap either. Comparable meaning not having excessively high current input requirements at the same overall power level.

Unless one uses recycled server power supplies, and understands and is willing to accept either the power limitations or possible safety concerns involved.

I suspect more technical information on those supplies can be found on the Iota site. Including higher voltage units, and far more detailed technical information. Which indicate quite high input current requirements for the amount of power produced.

Iota Power Supplies


Again, the high current issue can be mitigated to some extent if full charger power is not needed. But if even close to full power is needed/desired, it would be difficult to discount the importance of PFC at these power levels for a successful installation.

My assumption was that since he's currently using these chargers, that he already had individual power supplies so there would be no investment.

Depending on power required it might take more than 2 units. And either accept the DUO power reduction of running them at 12 volts. Or understanding, accepting, and working with the practical and safety considerations of running pairs in series for 24V. Not saying it can’t be done, but there are risks one must understand and deal with.

Good news is I believe they, well at least the 2 larger ones, have the PFC feature I keep rambling on about. Not sure on the smaller one.

That's certainly reasonable of course.