NOCO Genius GEN5X2: 2-Bank, 10A Onboard Battery Charger - 5A Per Bank, 12V Waterproof Marine Charger with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium Batteries

I installed the NOCO GEN5X2 onboard charger in the engine compartment of my boat, and it has been a fantastic upgrade. Installation was very straightforward. The unit is compact and rugged, and it mounted cleanly in the engine bay without getting in the way of anything. Wiring was simple and well-labeled, so the whole process went smoothly even working around other components. One of the standout features is the LED indicators. I really like being able to quickly check the status of each battery individually at a glance. Whether it’s charging, fully charged, or in maintenance mode, the lights make it easy to know exactly what’s going on without any guesswork. Another huge benefit is how well it maintains the batteries during long periods when the boat isn’t in use. During the off-season, it keeps everything topped off and conditioned, which helps extend the overall life of the batteries. That peace of mind alone makes it worth it. Overall, this charger is reliable, easy to install, and does exactly what it’s supposed to do. If you’re looking for a solid onboard charger that performs well and gives you clear status feedback, this is a great choice.

This is a great charger from a great company but pay attention if you’re hardwiring it! Do not cut the wire before the rubber on the charging leads. That is a temperature sensor that is wired in with (2) 26 AWG wires. The charger won’t work without that. I did make that mistake and was able to splice it back in and shorten the wire as I’d like. Now it’s portable but it’s designed to be mounted and will charge all battery types without fuss. Super easy to use as well.

Super good battery tender. I mounted it in my 1997 F350 7.3 and it keeps the dual batteries charged perfectly. Finding a good place to mount it was rough cause of the length of the leads. Another foot of cable and it would have reach both batteries with no issue but I managed to get it on, it's just a little tough. The lights on it are easy to see and labels easy to understand. It functions how it should and makes long storage easy for the batteries.

Works well for my two lithium batteries on my boat. I've even brought a couple of other batteries back to life before installing on boat .Grateful product.

Easy installation. Works great.

First off, this is my 6th NOCO product and all have been awesome. Great chargers, boosters, etc. Quality and performance has been superb! This GEN 5X2 forced me to have to use their customer service, warranty, etc. which has also been stellar. These GEN 5X2 dual bank chargers seem to have a common issue with one of the banks failing. One bank, mine was the second bank that failed, blinks between the charge bar and the standby lights. No matter the battery, the fuse, the connection, etc. A way to test it is to use a multi-meter to test for continuity between the positive and/or negative battery lead on that bank with the a/c power cord prongs - all disconnected, unplugged, no power, etc. The good bank will have some continuity like 36-37ohms. The bad bank will have nothing, pure open circuit. If it happens within the return with Amazon then use that. Otherwise, if its under the 3yr warranty then use no.co site to contact customer service for a warranty claim. Mine was after the 30 day return window. Initially buying it we only had one battery on our boat, knowing we were getting a second house battery. A couple months later we installed a second house battery on our boat and connecting the second charger bank, it immediately started the dreaded blink between the first charge indicator and the standby light, so that bank never worked. Not sure it is an immediate fail for others but was for ours. NOCO customer service was quick and easy. I reached out late at night with their request a call option on their website. The next day got a couple calls because I didn't have my phone near me, an email with troubleshooting steps, and next steps for a warranty claim. They'll let you ship it in and wait for a return after receiving and testing the failed unit. Or, they'll let you buy a replacement from their website - which was cheaper than here on Amazon - and refund the purchase once they've receive the return faulty unit and test it to verify the unit is faulty. I chose this option for a quicker replacement. 4 stars mainly for the unit failing but definitely love their products and am now a fan of their customer service. I'll follow up with review if the replacement unit fails and drop stars. If all is well, I think 4 is sufficient for an otherwise great product and company but consideration for this mishap.

One bank stopped working Called product support They were very rude and said they couldn't help because it was past warranty date I expected it to last longer than it did

Used this two years now. I maintain two winter stored batteries in my fishing boat. Works great.

Funciona muy bien y es exactamente lo que pedí

Equipamento cumpri o informado, fácil de usar, uso na moto Ducati e Jet-ski See-doo equipamentos que requer um carregador diferenciado para não correr risco de danificar alguma eletrônica

Excellent charger, for your boat very efficient, waterproof and safely maintains your marine batteries. E specially for maintaining dual battery set ups. Very happy with my purchase. Highly recommend.

Excellent product that allowed me to resurrect 2 12v boat batteries that discharged below their minimum voltage. Installed on boat and now used as a charger and maintainer

Fitted this in my boat, (as it has 2 batteries). It's an extremely high quality product that keeps the batteries in tip top shape via the mains. I'll be hooking it up to a solar panel next, so I'll update here when I know the results.