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Power supply 12V, 40A, 500W (Hongwei HW-12V-500W) Review



Very good

Revainrating 4.5 out of 5  
Automotive, 🏎️ Performance Car Parts & Accessories, 🛑 Brake System, 🏎️ Performance Car Parts & Accessories

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Description of Power supply 12V, 40A, 500W (Hongwei HW-12V-500W)

Power supply Hongwei 12V, 40A, 500W is a switching power supply. The device converts AC to DC. The pulse conversion circuit provides a high efficiency of 86%, while the unit is compact and lightweight. Output parameters 12 V, 40 A, 500 W allow the unit to be used in areas such as lighting, video surveillance systems, mobile device repair and others. The potentiometer makes it possible to fine-tune the voltage, and the built-in voltage regulator ensures stable operation of the unit. Active and passive cooling systems protect the unit from overheating. Protection against short circuit, overloads, overvoltage is implemented. The unit provides stable power at maximum modes with minimal voltage drop.


Global ratings 12
  • 5
  • 4
  • 3
  • 2
  • 1

Type of review

Revainrating 4 out of 5

As such, there are no disadvantages, it is convenient to use.

I only checked the performance, I didn’t load it much (there wasn’t a load at hand). I connected a car lamp 12V 4.3A. The primary current is 0.25A at 220V. Didn't check the setting. The feedback can be considered positive.

  • Delivered quickly, the power supply works.
  • There was a dent on the package from one end, the power supply dangled freely in the package, it was necessary to at least cover it with foam. I shook something chipped out of the block, there is a photo.

Revainrating 5 out of 5

Great value for money, one of the best offers.

I took it to a 180 W compressor pump, which had already "killed" more than one power supply (12V to 200W), but this time I decided to take a power supply with a margin - I attached a 220 plug and a car socket to it. It works well, the compressor pulls, it shows 12.3V at idle, you can adjust plus or minus a couple of volts by adjusting the unit. If anything - swap the neutral (N) and phase (L) in reverse, it works, since the voltage is simply rectified)

  • It works, for me it gives out a current with a margin. There is a trimming resistor for regulating the output voltage, 14V seems to give out normally without any special drawdown of characteristics.
  • Only the power supply is included - all wires must be purchased separately. But this is more a feature than a drawback.

Revainrating 5 out of 5

A nice option for the money, one of the best deals.

I bought for a Chinese diesel autonomous heater 12 volts for a garage. At 220 appeared not so long ago in stores. Handles great. Later bought another 12 volt heater. I was not sure that the power supply would pull two heaters, but I decided to try it, since a 220-volt heater costs more than a 12-volt + power supply. If it doesn't work I'll buy another power supply. The result did not disappoint, one block pulls two autonomy.

  • Powerful enough
  • Afraid of water, the noise of the cooling fan if it is important to someone.

Revainrating 5 out of 5

A good quality product, I rate this purchase perfectly.

I took it as a source of 12V to the country house, I have not tested it under load yet. The fan is always on, the speed depends on the output voltage, it is quite noisy, but not critical for my purposes. For myself, I immediately decided to “finish” a little: I installed a Chinese digital voltmeter and brought out a voltage adjustment potentiometer. The result is a range of 10.5 - 14.5 V without load. I am satisfied

  • Price, declared power

Revainrating 4 out of 5

I like the product, the quality did not disappoint.

Everything would be fine if not for the fan noise. As the output voltage increases, fan noise increases significantly. Obviously powered by the output voltage. It is necessary to disassemble to put a variable resistor on the fan. Other than that it's good for the price. Analogues are 2 times more expensive. There is no desire to from a PC power supply to get 12v.

The store is excellent, packed soundly, the block itself, instructions and a business card of the store are available. Delivered quickly, courier polite. I connected a screwdriver 14.4 v-1.2A pulls.

  • Power, voltage adjustable from 11 to 15 V. Corresponds to its characteristics, build quality. Who wants to take, I recommend.
  • No

Revainrating 5 out of 5

I didn't expect the quality to be so high.

I turned it on, everything works, the fan is not very noisy either. The voltage is regulated within 9.5 - 14.6 V. I did not find a large load, but up to 3 A, of course, it does not feel. A good thing. And if you add a voltmeter (digital or analog), a potentiometer for adjusting the output voltage, terminals for the output voltage, switches for the fan and 220 V, a 220 V power cord, wires, material for the case (you can also use the case) and every little thing, could have turned out to be a…

  • Dimensions
  • For 1850. - All liked it.

Revainrating 5 out of 5

Best thing for the money, glad I did it.

Pros below: I connected two car amplifiers, it pulls normally and you can still adjust the voltage up to 15 volts. Cons: The cooling fan is buzzing like a steam locomotive I will change to a quieter one

Revainrating 5 out of 5

The best thing Ive ever used, a great item for everyone!

Purchased for a tape 15 meters long and 14 watts per meter. The fan is very noisy and starts immediately with the inclusion of the unit itself, there is no speed control. However, this does not matter, because the power reserve of the block itself is quite sufficient. The fan turned off, from prolonged operation at a load of 220 W, there is practically no heating of the unit. The block itself does not squeak or click! I recommend!

  • well made
  • No

Revainrating 5 out of 5

Best thing I have ever used, highly recommended!

Of course, you can lose the warranty, remove the fan from the terminal and calmly load the power supply unit with 300 watts at peak loads - this way it does not heat up. Which is exactly what I did. Has some pros: The ratio price / quality - on top. The metal is thick and conducts heat well. the hole is enough, the terminals too. Easy to disassemble with two screws. Next, shift the lid (well done designers, they did everything correctly). Fitting parts in microns. Cons below: Noisy fan, speed…