Discussion How to convert Server Power Supplies

Thought it might be useful to gather this in the one place.

The practice of converting computer SERVER power supplies to make a very high quality high power supply at low cost is attractive. It doesn’t normally require any modification to the supply but the hard part is figuring out how to trick them into turning on. Far and away the best way is to find someone who has already done it. I have put down a few references I know about and welcome additions.

This is NOT about converting normal PC power supplies. (The ‘ground the green wire and add a load resistor’ stuff). That is covered extensively elsewhere.

Please, please. This is a REFERENCE thread. Just post a link (with comments) to other posts that show how to do it if you know of one that isn’t here.

IF YOU HAVE AN OPINION OR JUST WANT TO COMMENT please do it somewhere else (like the original threads for example or PM me). Obviously info on sources of supply for these devices is welcome though – please post that if you know it, as well as any errors that need correcting.

Hope this proves useful.


Various threads containing information on converting different supplies.

1) The original IBM Series 235 Supply which started it all.


2) A simple high quality 12Volt 100Amp Power Supply thread starts here


This is my thread on the HP PROLIANT DL580/ML570G3 which is a 12V 1300Watt supply. It's still my favourite for quality, power, small size and having a proper plug for the power cord BUT it's extremely noisy because of the two small high speed cooling fans. Most people will find its vacuum cleaner impression a PIA. Note that you have to take care to identify exactly which supply by the part number. There is a range of DL580 computers with different supplies.

3) The Compaq HP ESP114 Series 12V 55A Power Supply thread starts here


This is earlb's thread on converting these. Probably the most popular and best solution. Decent power but much quieter because they are bigger. Easier to obtain and cheaper as well

The attached picture shows the HP 1300 Watt and ESP114 side by side (thanks earlb). The SMALLER one is the more powerful 1300W supply.

4) Dell A570P-00 570W


5) Compaq Proliant 169286-002 750W

http://www.rcgroups.com/forums/showp...&postcount=128 plus


6) Sony APS-111 12V 33.3A (Used in CISCO gear). Also known as Ascom Energy Systems Galaxy D0009237


7) HP Power Supply DPS-600PB/700CB


8) hp PS-3381-1C1 PSU


Using two supplies in series to get 15 or 24V at high power.

Two of the DL580/ML570G3 supplies for example will supply 2600W at 24V on a 240V supply! Here’s the thread I started on the practice of connecting two supplies in series to get 24 Volts at high current. Becoming more relevant with the growth of 1000Watt chargers. Feathermerchant on the forums sells these already made up if you don't feel you have the knowledge to do it yourself.

9) Using two power supplies for higher voltage/capacity chargers: safety issues


See post 183 in particular for conclusions.

Attached Thumbnails

96.8 KB ยท Views: N/A
View complete forum thread

Related threads

Question Server power supply pin-outs -- how variable?

... going to be getting a charger that can handle more power than any of the converted PC power supplies I have can provide. Just now discovered the idea of server power supplies from e-bay. In comparing the units on e-bay to the threads on the sticky, I find many similar ...

Discussion Help me choose a power supply

... largest battery that I use is a 3s 2200 mAh Lipo. Most are in the 350 - 1000 ... . I really have no future plans of going to larger more power hungry planes. I currently use a Turnigy ... both off of the supply). I do not want to convert another PC power supply. I do not want to use a Server power supply ...

Discussion My converted Dell Power Edge Server power supply

I just finished up my latest server power supply. It is a Power Edge 1800 rated at 675 watts and up to 55 amps. It is very compact for such a powerful unit measuring at about 3" x 3" x 8". The model # is 7000880-000. I haven't had a chance to give is a good ...

Got a 12VDC 13A OP Server Power Supply, but only 5VDC OP?

Hey Everyone, I have just aquired a 12VDC 13A O/P Server Power Supply to supply power to my DC field charger. I can only find + 5VDC O/P on the molex connectors. I'm assuming that something needs to be switch inside the P/S via a short across two of the molex connections? Any ideas? Lex

Can I run Two Chargers off of (1) 12V regulated power supply?

... , I was using an old computer power supply but it is about shot. I have two chargers to charge my Nimh & Lipo battery packs. My question is can I run both chargers (Hobbico QFC MKII & Prolux Lipo charger) of this one 12 Regulated power supply? -Thanks- Mike

Discussion Concise tutorial on PC power supply mods, what an RC modeler needs to know

Here's my tutorial video containing vital information any RC modeler needs to know about using a PC PSU to power their battery charger. I found tutorials about lab power supplies full of good info, but not RC focused. I also found RC focused videos missing ...

Discussion Help with converted pc power supply

So i just finished my conversion on my old power supply using these instructions http://www.wikihow.com/Convert-a-Com...b-Power-Supply used the same resistor for the load, but im only getting around 10v no load. how can i increase the voltage?

Discussion My take on the HP server power supply.

... server power supply. I removed the breakout board, figured ... angle aluminum I had laying around then mounted it on the power supply so that everything looks nice. I also added ... setup for under $25. I'm going to start modifying my second power supply and I'll take pictures and document. ...

Discussion My new server power supplies

Yesterday I found a computer recycler who has a huge amount of old server power supplies. They have two prices. $5 for ones they have not tested and $20 for ones they ... able to get it to turn on and measured 11.9 volts. I need to solder some power leads. It is fairly compact measuring 9x5x4. The pins ...

Discussion Has anyone converted an IBM X345 Server Power Supply???

I have a few power supplies from old IBM X345 servers that I would like to convert to charger power supplies. These are the Artesyn 7000758 models. 514W, 12V, 42A. Has anyone done one of these yet? I just need the pins to jumper to get the DC to fire up. Thanks in advance. Tim.

Using two power supplies for higher voltage/capacity chargers: safety issues

... 183 has my conclusions from the discussion in this thread. With the growth of high capacity battery chargers there has been interest in beefier power supplies capable ... of posts on modifying IBM, Compaq and HP server power supplies to provide 12V at 40-110A and this is ...

Can this power supply be converted for battery...........

charger use? I have heard that folks are converting these power supplies from computers to use on DC battery chargers. I was wondering if thise Dell 90w AC adapter would work. I guess there is some type of modifications.

charger to PC power supply connector

... a server power supply that I am converting to use for RC but I am trying to decide what kind of connector ... output leads. I don't want to modify the charger power source leads ... . My first thought was to use deans between the power supply and charger but then I would need to somehow create an adapter ...

Can a car battery charger be used as a 12V power supply?

... Sears 6/12V 6A car battery charger, it outputs @14.4 V DC. When I hook ... works fine from a 12V battery or car accessory adapter ... , and I want to avoid having to buy an all new AC/DC charger or a power supply, (probably the cheapest option), or a heavy deep cycle battery. I have a separate balancer/watt ...

ATX power supply convert.

I'm converting an 430 watt ATX PC power supply to use for my chargers. I've ... much lower then when discharing durring flight. So a batteries discharge lead would need to be significantly higher ... good enough for most charging applications? My biggest batteries are 2200 which I think a single 18 awg wire ...

field battery recommendation/power supply

... I go fly but I try to get about 10 flights or so. I have a ac/dc hyperion 6s charger and another DC only 12 cell charger I am told If I use my car bat( ... bang for the buck battery and where can I get it. since Im relatively new to electric, why are power supplies needed? I know some guys convert ...

Problem with Converted PC Power Supply

I found all the right wires and got a power supply converted. It successfully charged a HLG battery at 200 MA but when I moved up to my Astro charger, it stopped. I never got a display on the Astro charger. The fan internal to the PS stops. After being disconnected ...

Battery car charger used as a power supply??

... purchase a Dymond Super Turbo charger. I already have a FMA Versapulse ... car battery (full size car) charger (2A to 10A) as a power supply for the Dymond ST? I'm already doing this with a cheap Team Associated charger with no problems. Any suggestions would be appreciated. Thanks.............Sylvain ...

Question Parkzone 1S Charger - Can I use my PC Power Supply?

Hi, Just wondering if I could hook up a PC power supply to power my 1S battery charger. You know, those ones which come stock with ultra micro parkzone planes. My converted power supply has one output of 5.5V 25A. The charger has a label saying: "Input, 6V ...

Discussion Running power supply and charger from 120v outlet in car

I have a Powerlab 6 charger and a Max Amps 12v power supply. My 2011 Buick Regal Turbo has a 120v AC power outlet. I'm assuming I can power the power supply from the 120v outlet? If so, ... power supply from the 120v outlet or or am I better off powering the Powerlab 6 directly from my car battery?

Can I Run 2 Chargers Concurrently On A 20 Amp Power Supply?

I have one of these Powertech 20 Amp 13.8V power supplies: http://www.jaycar.com.au/productView.asp?ID=MP3078 I also have an ... 4S coming next week. What's the max number of chargers I can run off this PS before needing a second one? The largest battery I charge is a 2200mAh 3S ...

Cellpro charger and Laptop power supply - how?

... electric heli forums. I want to upgrade my charger to a good lipo unit, ... the Cellpro is the best. I've seen posts about using a converted PC power supply and also using some converted laptop ... that is rated 16V and 4.5A - is this acceptable to use to power the Cellpro 4s? If so, I assume I need to cut ...

How do I verify the amp output of my dc 12volt line on my converted PC power supply?

... supply for use as a 12volt DC power supply for my battery charger (ElectriFly Peak400). ... additional fan, 1 to the resistors, and 1 to the green power-on line. What I'd like to determin now is what my actual dc amp ... neighborhod of 5amps on the 12v output? My charger only requires 3amps to operate, ...

Computer Power Supply for Charger ?s

I recently purchased a Duratrax ICE charger so I could move toward Lipos and get a better charge on my NiMH and NiCD batteries. However then I found out that my power supply would not put out enough Amps to run it (2.5). So I went to frys and bought ...