Cllena DC 40V-90V to 12V Converter Voltage Regulator Reducer 48V 60V 72V Step Down to 12V 20A 240W Converter Waterproof Buck Transformer Power Supply for Golf Cart Club Car LED Light

I decided to power a few electronic devices on my boat with 12 volts as opposed to using the wall wart power chords that depended on 110 volt AC. A lot of devices, like my router, mini pc, disk drive enclosure, etc. use 12 volts.The one issue with using the boat's 12 volt system to power these devices is that the actual voltage can get well over 14 volts when the boat's batteries are being charged. Im not sure the electronic devices can tolerate this higher voltage.This device takes in the voltage of the boat's 12 volt (nominal) DC system and outputs 12 volts.It arrived promptly, was easy to install and works fine.

Work well to provide stable voltage.

Repurposing an old Verizon FiOS battery backup power supply sounded good, not so much when I measured the output voltage! To my surprise, the labeled 12 VDC output voltage measured over 15 VDC! My search to find a converter to drop the 15 VDC to a stable... regulated 12 VDC found this one!The pros:+ Reasonable price of $14.24, with free Amazon Prime 2nd day delivery!+ Good customer product reviews for the 12 VDC - 3 A converter & regulator.+ I like not having to adjust the output voltage, it's preset & not adjustable!The cons:- Made in China, for those that prefer to but product made in the USA.- The wire leads are on the thick side, which made crimping on Molex .062 connectors tricky, but doable!Closing remarks:▪ With 15.28 VDC in from the old Verizon FiOS battery backup power supply, the output was a stable, regulated 12.28 VDC... perfect! ◄ see my attached picture!▪ To my surprise, the "huge" heat sink stays cool to the touch!▪ I didn't want to drill holes, so I opted to use foam double sided tape to attach the heat sink. ◄ see my attached picture!▪ The Cllena 8-40 VDC >to> 12 VDC - 3 A, down converter & regulator is used to power the auto shutdown control valve on our RO - reverse osmosis water filtration system. ◄ see my attached picture.▪ I ordered 2 more of these for a couple other projects I have on the "to do" list!

It was easy to install and the inputs and outputs were clearly marked. I liked the ACC connection which turns the converter off when the keys off.

I bought this for my 48 volt electric golf cart. The guy that refurbished it hooked the light kit to two of the batteries. That meant that whenever I was using the lights, two of the batteries were getting used more than the other 4. I did not like that, so I bought this converter along with a fuse box to hook the lights to. I hooked mine up with a relay and used the voltage from the ignition key to trip the relay so that this device was only powered when the key is on. This saves on battery power being used when you are not using the cart. It was a fairly straight forward install and I had no trouble. Works as it should and I recommend it so far.

I used this to step down the voltage from my solar panels which could get up to 15v to 12v. At first I had problems with the refrigerator because it was getting down to 10v supply while my battery was at 13v (40w refrigerator, only thing running so no way I was over 10 amps) so I had to move the fridge to direct battery power. Then even my maxxfan wasn't wasn't getting the minimum 11v when it was the only thing on. Voltage seemed to decrease over time.Maybe mine was defective but it sure wasted a lot of time and effort to install and then uninstall all for nothing.

Great product

I am using this between a 100W solar panel that puts out 17-18V in full sun, and this regulator puts out a nice 12.6-12.8V that I then run to a 12V vehicle fan to exhaust heat out of my shop when it is sunny out. When clouds come over the solar, this unit will put out what it can get from the solar panel, I have tested 4.4V output from the panel and regulator, and that was enough to keep my fan running. The regulator won't just cut off when it drops below the input and output specified voltage, so that may be something you need to worry about if your application requires a consent voltage. In the photo, you can see the regulator sharing the solar input with a charge controller. I went with this regulator so I could run the fan from the solar with no batteries attached.