Worth a buy? The $10 44 Volts to 64 Volts 10A Power Supply from Aliexpress

$10 48 Volts 10 Amperes Power Supply from Aliexpress.
The power supply is rated at 48 Volts 10 A.
The output Voltage is adjustable from 44 Volts to 64 Volts.
For a power supply that can be adjusted from 44V to 64V that can do continuous 8A, although it was not able to do its 10A current rating, for the asking price it is not too bad, especially if you can grab it for $10 during a sale, promotion.
Check this Power Supply powering the Wondom TPA3255 2x300W Power Amplifier here • Testing the Wondom TPA...
Output Voltage Set to 50 Volts:
Idle Power Draw - 7.8 Watts
Power Draw by the Electronic Load - 400 Watts
Power Draw from the AC Source - 455 Watts
Efficiency - 88%
Output Voltage Set to 64 Volts:
Idle Power Draw - 10 Watts
Current pulled by the load - 8A
Power Draw by the Electronic Load - 514 Watts
Power Draw from the AC Source - 576 Watts
Efficiency - 89%
Ripple 8A Load - min. 1Vpp
Voltage Regulation @ 8A Load - Very Good Better than 1%
Power Supply Over Current Protection is set to about 8.5A.
Fan is always on.
The power supply has the minimum mains input filtering on.
Primary bridge rectifier GBU810 - Datasheet says this can do 8A @ 100℃.
Primary swithcer 2 x 2sc2625 - Datasheet says this can do 10A.
Secondary Rectifier Diode N-D92-02 - Datasheet says this is rated at 2 x 10A (20A total)
If the specs of these parts is to be believe it will be able to deliver 8A continuous at 220-240 volts input primary voltage even if the parts are derated at 40% but as always it is different with actual test , unfortunately my place is not suitable to test and run parts like this for extended period and just do not have the funds to run the test for days due to electricity cost.
Semiconductors do not like heat and most of these cheap power supplies are rated at 25°C ambient room temperature unless it specifically states otherwise..
Running the power supply at higher ambient room temp of 30 °C+ and the psu is also inside and enclosure is gonna get the temperature of the psu really high and this could shorten the life of the psu if it is also run at full rating.

[@DeadKoby]

Thank you for performing this test.

[@boknoynaruto3824]

Thank you for dropping by.

[@chrisharford2610]

Thank you for the power supply information.

[@boknoynaruto3824]

Thank you for dropping by the channel.

[@NoseyLurker]

The handbook that comes with some of these drives say they can only be used at 70% of rated current of used occationally. and if you use continuously, then only 40%.. Have you tested running this at 8 amps for a long duration, like days? I heard that they burn out completely.

[@boknoynaruto3824]

The primary rectifier of the PSU GBU810 its datasheet says this can do 8A @ 100℃, the 2 primary swithcer 2sc2625 its datasheet says this can do 10A and the Secondary Rectifier Diode N-D92-02 its Datasheet says this is rated at 2 x 10A (20A total).
If the specs of these parts is to be believe it will be able to deliver 8A continuous at 220-240 volts input primary voltage even if the parts are derated at 40% but as always it is different with actual test , unfortunately my place is not suitable to test parts like this for extended period and just do not have the funds to run the test for days due to electricity cost.

[@boknoynaruto3824]

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[@jackipiegg]

Any recommendation for tpa3255 power supply without fan?
My current one has a fan and its noticeable.

[@boknoynaruto3824]

I can only suggest an oversized psu with with a properly temperature controlled fan that way the fan does not turn on when the load is low to medium.That means asking a seller if there psu has a temperature controlled fan.I had a few psu from Ruiding Tech. the one they use for there RD60XX series power supplies though the minimum voltage the psu can be set is only 53Volts but it is still a little bit high for the TPA3255.

[@jackipiegg]

@@boknoynaruto3824
Currently I'm using meanwell lrs-350-48v, the fan is annoying.
I don't need a variable power supply, just 48V will do. Fosi sells 48V5A but it costs 3x the price of meanwell which doesn't make sense to me. Any other hidden gems you found?