DROK Boost Buck Converter 9V-36V to 12V 3A 36W Plastic Shell Waterproof Auto Step Up Down Voltage Regulator 12V Volt Transformer for Car Audio Solar Power System LCD Television LED Display Screen

I wanted to connect my 10 amp (20 volt) solar panel to a small 12 volt water pump. The voltage of the solar panel varies between 20 volts down to zero depending on the sunlight and I wasn't sure the that the small pump would take more than 12 volts so I connected this in between the solar panel and the pump. Worked perfectly. In bright sunlight the panel puts out 20 volts and the unit drops the voltage down to 12 volts for the pump. Problem solved! Specs say it will take in up to 36 volts and output 12 volts at a maximum of 5.6 amps. The solar panel puts out about 20 volts at a maximum of 2 amps, this unit drops the voltage down to 12 volts. Works fine.In addition, the unit is well sealed and seems weatherproof, which is important since I have it mounted outside of the water fountain in the weather and exposed to the elements.

This DROK DC Stabilizer is one of 2 main fixes for the dreaded MaxxFan green light beep and failure. The MaxxFan is the Best and Worst RV fan in the industry. When working, it is without a doubt the best RV fan with the most air movement, quietest operation, and low amp draw of the various options out there. But it suffers from 2 manufacturing fatal flaws that have been well documented by many who have suffered the fan failure. The first flaw is the circuit board not being waterproof, and living below a vent cap that can allow outside water onto the board, or inside condensation to drip onto the board. The second flaw is the electronic components used that are extremely sensitive to voltages over 13 volts or so. This is problematic as many RVs see voltages up to 14 to 14.5 volts when receiving charge from a generator, a tow vehicle, or a solar system. So having read numerous accounts of fan failures, and methods to correct the problem, I went in search of a DC voltage regulator. This one received good reviews, was well priced, and was also used by other fixing the same issue with their own MaxxFans. I installed this voltage regulator after having to replace my failed circuit board, in the hope that this permanently solves one of the problems. I bench tested this unit before installing it, as shown in the photo, using a portable lithium battery that provided 13.3 volts output. This Autoutlet regulator held the through voltage to a constant 12.2 volts. After installation, I again tested it once connected to my RV 12 volt system, which on shore power with the battery charger active was showing over 13 volts. This regulator did a great job of holding it to 12.2 volts installed. To protect the circuit board from problem #1 (moisture) I also coated top and bottom with thin coat of GE Silicone Supreme (neutral curing silicone sealant). I'm hoping these two remedies will keep my MaxxFan operating for many more years to come, hopefully with no more flashing-green-lights-of-death. I can't speak to longevity of this voltage regulator yet as it's only been in for a few months of operation, but so far it has helped the fan work flawlessly, thru all 10 speeds, in forward and reverse, as it is meant to operate. If you're looking for a reliable Voltage regulation option, I can highly recommend this Autoutlet device and the company selling it. Check out the attached photos for visuals of how I mounted it, using hot melt glue, into the outer frame of the fan. This caused no problems with clearance even in the low profile roof of our little Coachmen Apex Nano trailer.

El funcionamiento es adecuado, lo utilicé para eliminar el efecto de parpadeo de luces para una motocicleta y funcionó perfecto al rectificar los 12v requeridos

Works OK .. would have been better if it had an in-line fuse as part of the product.

A hassle free stepdown converter, taking 36V from my meanwell power supply and converting to stable 12V without any hassle and without generating any perceptible heat. I'd buy again for other projects.