Help Choosing DC Power Supply

[RustyUs]

I think I've narrowed it down to these two 24v power supplies...

New Version DC 24V 50A 1200W Power Supply​

DIGISHUO DC 24V 50A 1200W Power Supply​

If anyone knows of a better deal, or better 24v power supply, I'd appreciate any info you could pass my way.

TIA

 

[WickedFog]

@Greywolf74 bought a good one off aliexpress.

What charger(s) do you have again?

 

[RustyUs]

@Greywolf74 bought a good one off aliexpress.

What charger(s) do you have again?

Yeah, the thing is, the prices and/or shipping on the aliexpress power supplies will be greater than the power supplies shown above... and some shipping times show possibly April until I could receive some of them .

 

[RustyUs]

@Greywolf74 bought a good one off aliexpress.

What charger(s) do you have again?

Hota H6 Pro, and D6 are my current chargers.

 

[jimdavis577]

I think I've narrowed it down to these two 24v power supplies...

New Version DC 24V 50A 1200W Power Supply​

View attachment 221062

DIGISHUO DC 24V 50A 1200W Power Supply​

View attachment 221063
If anyone knows of a better deal, or better 24v power supply, I'd appreciate any info you could pass my way.

TIA

why not this instead ???

https://rotorron.com/product/75-amp-900-watt-rc-power-supply/

 

[RustyUs]

why not this instead ???

https://rotorron.com/product/75-amp-900-watt-rc-power-supply/

I have one, well, not from Rotorron but $15 and some soldering...

I need a 24V~30-ishV power supply to do what I want to do. The Hota D6 isn't cutting it anymore for charging packs like the 8200mAh shown above... so I'm looking for a new charger to replace the D6. If only Hota made a dual channel H6 Pro, I'd be in love . To take the next step in charging power I'll need a new power supply to better make use of the new charger's capabilities.

 

[RustyUs]

I'm done looking. I spent way too much time on this subject and trying to look for rock bottom price. I just ordered this 24V-50A 1200W power supply from Aliexpress.

 

[RetroThutmose]

I'm done looking. I spent way too much time on this subject and looking for rock bottom price. I just ordered this 24V-50A 1200W power supply from Aliexpress.
View attachment 221159

Is that a standard size power supply? I have a few 3d printed stands that use the standard power supply as a base to clamp onto. But this looks like different dimensions?

 

[Greywolf74]

I'm too late to this convo but for anyone else looking for a DC PSU, you should always buy teh highest voltage your charger will support. in other words, if you charger(s) support 30V input then buy a PSU that is capable of 30V output. Its more efficient and requires less amperage.

In order to figure out how many watts to buy, use the formula:

P = V × I
where:

• P = power in watts (W),
• V = the input voltage required by the charger,
• I = the input current required by the charger.

For example, if your charger requires 48V and 5A input:

48V×5A=240W

Now take the 240W and multiply it by 1.3

(240x1.3=312W)

So your power supply needs to be 48V and at least 312W in the previous example. You could by a 48V 3000W PSU if youd like though if you want to future proof your PSU. The main thing here is use the maximum voltage possible and at least the minimum wattage using the formula above.

 

[WickedFog]

I'm too late to this convo but for anyone else looking for a DC PSU, you should always buy teh highest voltage your charger will support. in other words, if you charger(s) support 30V input then buy a PSU that is capable of 30V output. Its more efficient and requires less amperage.

In order to figure out how many watts to buy, use the formula:

P = V × I
where:

• P = power in watts (W),
• V = the input voltage required by the charger,
• I = the input current required by the charger.

For example, if your charger requires 48V and 5A input:

48V×5A=240W

Now take the 240W and multiply it by 1.3

(240x1.3=312W)

So your power supply needs to be 48V and at least 312W in the previous example. You could by a 48V 3000W PSU if youd like though if you want to future proof your PSU. The main thing here is use the maximum voltage possible and at least the minimum wattage using the formula above.

What's the 1.3? That for discrepancies?

 

[Greywolf74]

What's the 1.3? That for discrepancies?

Oh, my fault. I meant to add that the reason for the 1.3 is because power supplies are not 100% efficient so you have to make sure you leave plenty of headroom to account for inefficiencies. If you're buying some sort of really high end power supply thats rated to be 90% efficient you could reduce that amount a bit but Id leave it at at least 1.2. 1.3 for plenty of breathing room or cheap PSUs.

 

[RustyUs]

I'm too late to this convo but for anyone else looking for a DC PSU, you should always buy teh highest voltage your charger will support. in other words, if you charger(s) support 30V input then buy a PSU that is capable of 30V output. Its more efficient and requires less amperage.

In order to figure out how many watts to buy, use the formula:

P = V × I
where:

• P = power in watts (W),
• V = the input voltage required by the charger,
• I = the input current required by the charger.

For example, if your charger requires 48V and 5A input:

48V×5A=240W

Now take the 240W and multiply it by 1.3

(240x1.3=312W)

So your power supply needs to be 48V and at least 312W in the previous example. You could by a 48V 3000W PSU if youd like though if you want to future proof your PSU. The main thing here is use the maximum voltage possible and at least the minimum wattage using the formula above.

Thanks for that.
This is one charging calc that I use as it calculates 80% efficiency for power supplies... https://scriptasylum.com/rc_speed/chargercalc.html

 

[Greywolf74]

Thanks for that.
This is one charging calc that I use as it calculates 80% efficiency for power supplies... https://scriptasylum.com/rc_speed/chargercalc.html

Thats a good tool. Its a bit of a shame it doesn't go up to 48V.

 

[RustyUs]

Combining Chargers Needs

Thats a good tool. Its a bit of a shame it doesn't go up to 48V.

I'm not an electrician/electronics guru, but is it as simple as adding up my multiple charger's maximum wattage/amperage needs

to figure out how powerful of a power supply that I need?

Edit: The above pic is my charger's I am currently using off of one 24v 1200w 50A power supply. As long as I don't exceed "the numbers", I should be okay. Right?

 

[RustyUs]

Combining Chargers Needs

I'm not an electrician/electronics guru, but is it as simple as adding up my multiple charger's maximum wattage/amperage needs to figure out how powerful of a power supply that I need?

This is totally a worst-case scenario with all the chargers going at once. I'm calling it good. I pretty much maxed out my 2C charging rates needs today and all is well. How long the 24v power supply lasts... I'll get back to you.

 

[Mrgoodwrench35]

I'm sure this will make me sound like a noob but this thread seemed like a good place to ask this question. Why run your chargers on 12v supply instead of AC?

 

[WickedFog]

I'm sure this will make me sound like a noob but this thread seemed like a good place to ask this question. Why run your chargers on 12v supply instead of AC?

I am no electronics guru by any stretch of the imagination, but I have to assume converting from 110v AC down to the DC voltage the charger actually uses by way of a transformer or whatever eats up some of the power the charger can put out

But chargers typically can achieve higher output on DC voltage, especially if you run them at the highest voltage they can take.

 

[Mrgoodwrench35]

That was my assumption as well. But you know what they say about assuming......

 

[RetroThutmose]

That was my assumption as well. But you know what they say about assuming......

Ac chargers max out around 15amp iirc? Dc chargers go higher. I can charge at 35amp if I want to see some fire works

 

[RustyUs]

I'm sure this will make me sound like a noob but this thread seemed like a good place to ask this question. Why run your chargers on 12v supply instead of AC?

Simply, because my Hota D6 (DC only model) charger. It was bought because I had a 12v power supply for my previous chargers. The Hota D6 and D6 Pro chargers will top out at 165~168 watts while on 12 volts... so that lead me to the H6 Pro charger to charge my 4S and 6S LiPo packs. The H6 Pro is only a 200w AC charger. Running the H6 Pro off a 12v power supply, I'm able to max it out at about 320-ish watts.

When I got into heavyweight SCT 4wd platforms, I found I needed another charger that could give me my 2C charge rate amperage that I was looking for (≥16~18A) while charging 2S 8200~9000mAh LiPo packs. Sure, I could have maxed out the Hota D6 at 15 amps and called things good enough. Sure, I could have used my H6 Pro to get the job done, but I wanted a new dual charger to take over where the Hota D6 fell short... this is where the DX6 comes into play.

What you see in picture

is a 24v power supply. If I would have stuck with my old 12v power supply

; using it to power the DX6, I never would have been able to get the wattage I needed.