Review on 💧 Waterproof 24V to 12V 40A DC/DC Voltage Converter Regulator - Cllena 480W Buck Transformer by Michael Bazen

This is one of the most useful upgrades I've made to my boat. I'm swimming in a remote camp for a week. With long days on the water and not charging every night I sometimes run out of battery on my starter battery due to working fountain, stereo/amp and other things. This device allowed me to connect almost any 12 volt accessory to my 36 volt marine engine battery, so my starter battery was always charged. And it's powered by all three batteries for more even wear compared to connecting accessories directly to individual batteries in the bank. One note: I've read some reviews stating that the unit was shorted out on arrival due to a significant spark being produced when attempting to plug the unit in. . I had the same experience. After emailing Cllena directly (I thought the unit was shorted) I was informed that this is a common thing and got a lot of help from them. I ended up putting a switchable 50 amp switch between the 36V bank and the converter's power input. Because the switch was off, I didn't get any spark when plugging it in. I turned it on and voila! It worked great. So don't think that a big spark is a sign of a short - it's just the result of 36V compared to what some are used to from 12V systems.