$50 Dollar 2000 Watt 24V DIY Power Supply. (2Kw)
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- Опубліковано 27 вер 2018
- HP DPS-800GB Power Supply - j35.us/PowerSupply
Connectors - j35.us/XT-90
Sticky Carboard - j35.us/2y5bfOX
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A. Batteries work better at this time, caps are rare and expensive devices that are very good at doing things not needed for storage systems typically.
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I love watching you in your play ground. It is obvious you love doing your projects.😁
I love watching!!! I love the way you think!!! I love the way you explain things!!!
The safety code #21 is from the power supply having too much noise. As said in the manual, "it is quite
common that everything operates fine until a high-current charge is performed and then the communication link is
lost as the current is ramping up to a high-current charge."
Whenever connecting independent DC supplies either in parallel OR in series, it is ESSENTIAL that FULL electrical connectivity is checked for proper isolation AND equivalent voltage (parallel) and current (series) capability. In the case of series connection it is ALSO ESSENTIAL to ensure that a) BOTH cases are grounded properly and b) that the DC grounds are NOT connected to the Earth ground or when connected in parallel BOTH supplies will end up being shorted!
In a parallel setup, what generally happens if one PSU is turned off or fails? ... my intuition tells me that I really don't want power being sent into the wrong side of a PSU : O
Can't that large stepdown transformer become a really nasty step-up? Or, does the design of modern power supplies typically preclude this. I guess there's some nice power diodes in there - but surely they don't expect to encounter the full force of the PSU in reverse polarity. I worry that the protection just wouldn't be beefy enough for such unforeseen abuses : /
Does it all just get stopped at the rectifier stage, no heat, no worry ? I guess if it can't pass the rectifier at all - then the output smoothing stage with those big ol' caps maybe doesn't actually have to handle anything. But what if there's some path there (in the output smoothing) that can break down and cause current to flow : O
For the record, I'm not about to try any of this... but I am curious as to why it works.
Love your video. As I'm just getting back into my electronics I'm in need of more detail of all the wiring and grounding for this project. Thanks
Your channel is superb mr Garcia . Every time I watch something you are proving to be a great master of your craft and I learn so much with the information you deliver . And your a master of a human too with endless quality . Thankyou for your content and existence 🙏
Bravo for making this video.
I was just realizing my limitations with my current overpriced 15V powersupply and was thinking about something in the 24V range.
Thank you!
Or get some ATX supplies and do the same...Cost about nothing 2nd hand.
Good video! Since I don't have time to watch your Live-Stream videos, I appreciate it when you take the time to create real useful videos. Keep up the good work.
nice! when you first said Kapton tape I thought you said "Captain tape" and got kind of excited for a new character/person to the Jehu youtube channel, and their secret electrical insulation powers.
You can also add a resistive divider across the input pins and bring them
Up to about 13.5v before they start to over voltage. If you add a resistor across a pot inside you can bring them to over 14v. You should stack 4 of them and get a 48v-56v supply! I use the HP 1200w ps all the time for amateur radio stuff. They work great!
Hi, do you have information about this mod? im a amateur radio operation and this is a very handy power supply for my radios if they can provide 13.8v
Im looking for a SM power supply to charge my fiat batteries with. I only want to charge to 4.0v/cell 14s so i would need about 56v. 4 stacked can get me there? I wasnt sure if they where adjustable.
i would like more info as a felow ham please
Woah woah woah, you are putting a server power supply load on a resistive divider???
Vortechnology no, internally you can set the output voltage from the reference via a divider. If you want more then 13.5v you have to modify another divider to trick the over voltage limit. Your not going to put 100a through a divider :)
Series connection of switching power supply will upset the internal control loop of the individual units due to each power supply have slightly different internal impedance. Try drive the unit you have created at 90% of the rated capacity and show us what happens.
For your power and ground cables look up crimp supply welder cable. Priced great and pure copper.. and can take a lot of power without getting hot!
Amen on the fine strand stuff, up to SLMR (but that has fiberglass insulation and is a hellish thing to work with, locomotive cable essentially)
Only problem with welding cable is that damned rubber insulation and it's relatively short lifespan. I had my starboard engine aboard my Chris Craft wired with it and that stuff just all either fell off or was left as green muck filled tubing as the copper was mutated into greenish gooey paste. Best all around wire for this to me would be a tinned copper fine strand, with Teflon inner cover and a PVC outer jacket similar to tray cable in the plants. Expensive stuff but when you start comparing ampacities to the regular THHN building wire and it's complete lack of flexibility, it's often worth it.
Wow, I never thought of this. Great idea.
Take care is not so good. He is floating one of the power supply. That mean if something go wrong in that PSU you can got shock because not safety ground there. But a good isolation its work.
I know theoretically should work but I was afraid to do that....until I see your video. Thanks a lot!
I have a bunch of old PC PSU's laying around. most are only 300 watt but for how many I have just off-hand this could be a cool experiment
Good job! Btw as long as you left the ground connected to the mains they are still connected together so the cardboard in between is redundant but it is better than having metal on top of metal.
SuperBrainAK the output might not be referenced to the protective earth on these PSUs anyways, so it might not matter. Sometimes the manufacturers just ground the case.
SuperBrainAK worth to check the grounding anyways. (I wouldn't want to short these supplies out :) )
FinTutorials I’m pretty sure there is a CE rule that power supplies over a certain wattage need to be grounded
SuperBrainAK I think so too, but these server supplies might be designed diffirently, atleased the case was grounded.
in the video he shows that he put insulation under where the screws connect the chassis ground to the negative rail isolating the secondary of the psu from ground, so they were grounded all the way through
Great Video! Great Idea and Build !! And thank you for showing your supply links!! Liked!! and Subbed !!
Very good idea with the server power supplies!
You should also flood fill the card edge with solder as the whole of it is meant to transfer power, Not two points...
NOT the right way to proceed. Use the correct edge connector and multiple cable connections to the relevant pins. IF the single cable connection used is of sufficient current capacity on its own then there would be no issue in a single connection. It's not a point connection but a distributed one. Using the relevant, correct pitch edge connector with multiple cables as per its normal expected use would be the best.
Flood soldering will not provide more current capability for the link, and the gold plate on top of copper will STILL carry more current than the solder on its surface.
Connecting (soldering) multiple cables in parallel would work far better than flood soldering. That is a proven, reliable, hard wired technique used for decades in just about every kind of ATX supply.
@@boblewis5558 strip 32mm of insulation off an 8 gauge wire, tin the wire and solder it parallel with the pad's length instead of perpendicular like the XT90 in this video.
12 AWG is good up to 20 Amps continuously, braided cable a bit more.
One of the things I enjoy and respect about this channel is that mistakes get shared. 😊
Thanks for posting!
Really nice setup!!!
Awsome! this may be a great idea for diy electric range motorcycles. Already aware 3,600 watts will give a recharge of about 1.7 miles range per minute @ 30wh per mile. 102 mile per hour charge.
fills up fast a 12kwh pack in less than 3.13 hours with 15% efficiency loss & 80% use of battery capacity. that's 239 miles range in 3 hours , while using 80% of your battery capacity. All we need is instant or fast chargable batteries to get to 2 to 3 miles per minute of charge. Ev's rock.
One thing I learned recently is all these chargers have an input amp rating, and to get the full watts you need to input the max volts they advertise. Looks like this one is 30a. It’s a tricky marketing ploy they use and you’ll never be able to reach the advertised watts in practice.
I just xant get enough of your videos buddy. LOVE YA VIDEOS, SO INTERESTING 👍😉👍😉👍😉
that thing just charged a cell phone in 3 minutes. if it could handle those amps that is. crazy power
You are not supposed to charge a LiOn battery at more than 1/2 it's rated storage capacity. Example, a rated 3000Mah battery should have current limiting of 1500Mah@ no more than 4.2V EVER.
@@DrHarryT i know, thats why i was saying if the phone (intending battery) could handle the current income. I know its completely unreasonable to assume that would work. I just noticed the capacity it was recharging the bank in the video.
Jehu, I use a few Chargers like this, That I hacked, one I did the Floating Mod with Plastic washers and nuts(Nylon). I left mine apart for now, only because I may add them to a bigger Power supply I am making 1K adjustable. I wasn't sure how they might fit together, But Combined and on 220V, I get around 2400w or 200amps(HSTNS-PL11 x 2 ), and on std 120 I get around 1800watts or 150amps. I also made a smaller charger from the same PS and that is 750watts or 63amps (HSTNS-PL18). Both I use with my Reaktor and 1000w Battgo Ballance charger. Great Video!!!
You should be able to set the max input current like you can in the iChargers. Everything on mine is just a menu setting. I’m surprised you didn’t get something that can handle at least 7s! I’m using mine to test charge/discharge a complete PCB.
Jehu, I am a datacenter architect professionally. One issue you may run in to is the fans being PWM controlled from the host server, might not run @ 100% unless you jumper the fans to 100% of their rated voltage or short the PWM feed to the fan +. Maybe worth looking in to? Not sure if you address this in your PSU hack schematics. Thanks for the content, ideas, and videos! Love your stuff.
I believe the other charger blew up because the supply voltage was 12v. Similar to why I blew up the antimatter charger I have. The charger has to work to hard for the higher amp outputs. So supplying higher input voltage should help out the charger a lot! This is what I have noticed at least for the antimatter charger. I did the same mod with same server power supplies lol!👍
Bingo.. The Powerlab 6 and 8 Touch also can go up 48volt input.. really helps out if you go past 6s and high current
So when will you be recieving your nobel prize for your anti-matter charger?
They said its in mail 😆👍
Casually using my antimatter charger, nothing to see here. :D
maybe add another power supply... 36V :D
Jehu !
Very interesting!
Thanks
Thaks for share your knowledge. cuestión, can i use 4 universal 20amp power suply in paralell to get the same result.?
7:15 Hmm I need a bigger battery . . . Hey look a tesla pack, that will do nicely.
looks like a good start
great hack i have the sam ps with a isdt q6plus for my Rc toys
Pretty sure when charger on last video fried its because the Boost converter in charger was trying to boost voltage to 24V from 12V
supply and trying to get More amps than charger could Boost / pass thru - got hot - poof - I use Icharger 4010 Dual to charge 120AH Calb Lifepo4 battery from car alternator - works well - Im putting 2 Tesla S modules in my RV right now - also modded 3000 watt 50 volt server power supply- was not easy to get it to work - almost gave up( 2 weeks) but finally got it to work - 50 volt output power supply is what you my want- its what I need for charging tesla s 2 modules
Cool he found the hobby king forums .... happy for ya mate :).
Nice work 💪 Keep more video's coming 📹
Interesting splice at 5:23. Since the EC-5 female (charger side) is compatible with the XT90 male (PSU side), you can just plug them together.
4:11 Breakers in the UK are 16Amp for the 240V ring main circuit... 3840w through that bad boy before it says bye bye fool :D
Breaker for our main is 200 Amps at 240Volts. Should by load be limited to 160 Amps per code. 38KW but rated for 48KW. Sub panels include 50 Amp breakers for them. And yes , we do have some 50 Amp sockets.
gravelydon I didn't say main breaker, I said ring main breaker, which is the one that will trip if you are plugged in a normal household socket.
Hola! I'd been watching your videos about the DIY Emergency Solar Generators... do you know if there're still families without electricity at Puerto Rico? Thanks, Fede
There was a fairly recent video by Joshua bardwell that explained these chargers. Most of the chargers are limited by their input current not their output. I wonder if that's what's happening here.
RC chargers are very often input current limited, yes, if not always. Mosfets are expensive to oversize enough that you can fully utilize the power at the lowest input voltage.
Simple answer, yes.
Server PSU's are the best to use, they can handle the Continuous abuse :)
You're probably still going to run into the issue that the 0v output rail of the power supply is connected to chassis earth, so if you try and run two in series they're still going to short out via the ground pin on the supply
They didn’t
I wouldn't guarantee that's the case will all server power supplies, or even all HP server power supplies.
I clicked on this solely because i thought i saw you using Server PSUs xD and i was totally right. I work in a server farm and we literally just throw these things out when the customer requests a redux of their units. I never thought they really had a use besides just running Servers, guess whos nabbing a couple of these bad boys next time they roll through xD
Thank you. Big like
I will never buy a brand named power supplies for RC lipos which cost $380 for a 1200watt at 18v. They never last & they run hot! Server psu all the way to the bank. Thanks for sharing.
Just remember to also remove all the ground connections when combining power supplies.
Thermal camera on the wires may been interesting
steve64464 I bet that little xt to ec5 adapter was getting pretty warm
I used to build custom distribution boards. 70-80 °C is considered operating temperature.
Tibor Klein as long as you don’t touch it :)
@@SuperBrainAK and if lifetime is not of any concern
thank you
Think I’m gonna get that charger!
Dude, U need to start using some high current diodes in your projects !
Good job
Im pretty sure it would be easy to find/Convert these PSU to CC and CV, i will buy one and try
I've been scrolling through your videos trying to find the one where you modified the PSU to power up but I can't find it. I've tried this with 2 PSU's so far. One popped and died after pulling 30A from it for 3 minutes. It was a DPS-1200FB. The second, a HSTNS-PL11, worked fine the first time after I modified it, but then after I powered everything off and tried charging again a couple days later, the PSU's green led would blink on/off and the output would go from 12.2V to 0V repeatedly and annoy the chargers. The 3rd was also a DPS-1200FB works fine if I don't load it up much. Even 15A was too much for it as it shut down after 13 minutes.
For both, I was using a resistor between pins 32 and 35. On the DPS-1200FB, I used a 750ohm, on the HSTNS-PL11 I used 2 750ohm in parallel (375ohm), then like I mentioned, it turned on and seemed to work fine the first time only.
I'm just trying to charge my lipo's for my RC trucks. I run 2 chargers off of it, both set to charge at 15A, so probably pulling between 32-35 amps overall.
I believe the charge controller lost its data link to your actual power delivery units because of too much noise from the power supply input. seems to be a safety feature on these Revolectronics products. Maby your homebrew power supply wasnt as stable as predicted
hey, when you said you isolated it from the metal frame, after you pasted the circular pads, did you put the screws back in those holes?
Those ps can be modified to increase the Vout 1 volt at least. That will give you 26v or more. Thanks for share.
www.rcgroups.com/forums/showthread.php?1301679-Hp-DPS-800gb-a-power-supply/page11
This is slightly off topic, I want to charge by Chevy Bolt battery pack (355vdc) from solar panels which is not in the car! What do you recommend for a charge controller for that high of voltage? Than divert it to a string inverter which can take that high of voltage?
Nicely done!
I believe you can't go higher on the amps because the charger is smart and it knows that the battery is almost fully charged. So it won't push too much power into the battery at that point so that is doesn't harm that battery. If you discharge the battery down to about 50%, you should be able to push more amps. That is what I have seen with the smart chargers that I have worked with.
You could discharge it and give it a try. Just my thoughts. Again thank you for what you do, you do a great job!
Also did you ever go any further on your "Hoverboard Wheels" board and where able to get it to go faster with overvolting or re-winding them?
Hi Joshua, my thought exactly. At about 90% SOC the charger switches from constant current to constant voltage charging.
Ooh, a Magic Smoke Release video! Cool. Always fun, Jehu. (Shouldn't that read $100, including smoke release?
Do server psus have overcurrent protection?
I used few modified pc atx power supplies over the years but i need something stronger, at least 60A and server ones seem ok for the price.
That’s awesome
Why do you insulate the inside board from the case ground? If there's a short the current will travel back to the ground wire through the case.
If you were to flip the 1 power supply 180degrees would it help any having the edge connectors closer?
Chance is positive happening, like a chance to win the lottery. Since I assume you don't want to shorten your power supply you should use the word risk.
I know it's a small thing, but just one of those things that really shortens out my brain for a second, even at my native tounge 😜
Would you suggest the power lab 8 for a charger?
Can you put the power supplies in series to bump it up to 24v on the input side to and loose the headroom of wattage output of the power supplies?
Could 4 be used and 2 in series then 2 in parallel for redundancy?
Are server UPS good power inverters?
Interesting!
I found the exact psu x2 the other day . Some dude at the North Pole was chucking a server out of the helicopter into the snow and I said hey wait...lemme have those psus and he was like OK here you go ..." I wiped all the data off them".....and I says pardon? Now I have two shop 12\24 volt bench supplies.
going to build my fist lithium pack 48v 280amh what would you recommend to charge top balance it. also ideas for a bench power supply?
Should I use servo power supply to charge my ev battery pack individually?
Hello, i think i know what your saying on the video, is it really okay to hook two identical inverters in series? I want affirmation before purchasing these server power supply
11:00 input current is limited by voltage. Increase the voltage to 32V to get 40A. You can add other + and - voltages to go above and below 12V by jumping them together. This is why a PC power supply has negative voltages available.
-
TLDR: Jump the +12V +5V +3.3V on one power supply to get your 32V and 40A
Except you will find that the other Voltages will not produce the same Amps. So what you have just done is limited to it to 2 Amps if you don't blow it up first. Bad Idea.
What if you added maxwell supercapacitors or replaced lithium batteries with maxwell supercapacitors?
How did u wire it up?
why do you need to isolate the grounds? is it because you need to put them in series?
How many cells you put in that 5kw Tesla power wall
How do you decide what acid or salt solution tk put in a battery if you are making one?
Don't you restrict your charging to 85% of capacity? For longevity?
@jehugarcia I live in Canada, and have electric heat. Peak usage in winter looks to be about 80kWh a day. Any advice on how to build a powerwall big enough to manage?
So I'm running a 20S LiPo for my electric scooter. I'm going to build about 8 more 20S-4P batteries to replace my lead acid batteries. Right now I'm using a cheap Chenzhen Energy BMS. Any suggestions on a good BMS and charging system? I have a ton of different BMS's I got from Amazon but only the one I'm using had a wiring diagram.
Thank you so much.
Can i use the hp power supply listed below to do the same thing or it has to be the same model,
HP 578322-B21 579229-001 570451-001 1200WPower Supply DPS-1200FB-1 A?
and if i need to use one power supply to feed an inverter with a deep cycle battery is there a way to increase the output voltage from 12 to 13.5?
What will happen if one of the SMPS fails. will it feed 12v to the charger. Will this damage the charger or the charger has low input voltage protection?
Is there a way the same power supply units can be connected in parallel to give 12v 2000w?
hello i have my 2 servers 750w power supply on the way to make the project for charging rc lipos. question the second power supply with earth/ground removed what are the chances of a short and fire?
My only advice is use at least 8 gauge wire from that power supply to the charger and I bet u will be able to ramp it up higher. Even at 600 watts you should be using 8 gauge wire also I would ditch the connectors
come on that is a server power supply of course that must include some thing like over current or over voltage or something like that in order to protect the server itself from blowing up. but still a really nice video.
ditch those powerlab chargers for a Icharger 4010. it's input/output specs exceed the powerlab 8 and your new powerlab 6. you may want to read the manual for that charger. I think you can synchronously charge by connecting both outputs to the one battery like the icharger does. the icharger will output 70a in synchronous mode.
Do you have a link for how you wired them or a diagram ?
how did you isolate them?
If both of them weren't isolated power supply they wolud have blown up. How did you checked are they isolated or non-isolated
can we go as high 72v to charged a battery pack?
nice
Se lam is it possible to charge various types of batteries and from 20a to 150a with this power supply
I have a liteon 56v 1.1kw server PSU, problem is i cant find a Pinout out to get it to turn on :(-
How would you make a battery pack that would fit inside a full size home mechanical sewing machine? Like a singer model 6215 That would last at least 4 hours. Please help !
Do you sell these batteries? I like to use it for solar power
nice.....
If you would use DEANS WET NOODLE WIRE 12 gauge you would be able to not worry about overdriving the wire. Just a suggestion.