NOCO Genius GENM2 Fully-Automatic Smart Marine Battery Charger - 2 Banks, 8 Amps (4 Amps Per Bank)

A.N.: Noco products are my go to. Works perfectly on my boat

Canada on May 03, 2021

Scott: This is the second unit I purchased. The first was on a different boat and I am pretty sure it extended the life of my two batteries by at least a year or more. I just installed it on my new boat with dual batteries and it keeps them topped off at all times. Was easy to hook up and since it has no switches and is waterproof, you just plug it in and it does its thing. I expect a longer life on my new boat's battery using this charger.

United States on Jul 28, 2020

Allen VAllen V: Really like product. Took a bit to figure out how/where to mount under my hood but got it figured out and had to fabricate a bracket. It’s in my Diesel F350 here in northern Alberta. So far so good and keeps my batteries fully charged. A great addition to my truck.

Canada on Dec 05, 2019

Ryan ORyan O: I have never used a battery maintainer before but I now had a deep cycle RV battery and a deep cycle boat battery that were going to be sitting in my garage over winter. I did my research, read the reviews, and decided on the NOCO brand and am not disappointed. I will be looking to purchase individual maintainers for both that I can mount directly to the boat and trailer batteries to keep them in shape during normal use over the summer.

Canada on Oct 11, 2019

Christoph Halverson: First point- If you are considering buying a charger or not buying an onboard charger, stop considering and buy one- imagine a world where you never again have to wonder “hopefully the boat will start today...” by having two batteries and an onboard charger you basically eliminate ever having the possibility for a dead battery again- even if one of your batteries is dead and/or your engine charging system stops working, you have another battery you can switch to so you have plenty of charge to get home... After doing it, it seems like the most obvious investment a boat owner should make and elimates so much heartache- I will never own another boat without it. Specific to this charger, it’s simple to use and install and has worked perfect every time since I purchased it 6 months ago. I cannot say I’ve tried others to compare it to, but I can say this one feels extremely solid and is very easy to use. The only other product I purchased for this is the basic 3 way battery switch- a neighbor who is a retired electrical engineer for a boat manufacturer said the one-way protection fuse stuff they sell is unessisary and I haven’t had any issues. I use...

United States on Sep 08, 2018

Alex Combe: Great product. This was a direct replacement for the same unit. The old unit worked great for 4 years until one of the charging banks failed. Easily charges my trolling motor batteries on by boat overnight from depleted. This unit suffers a lot of abuse and dampness in the front of my boat all fishing season and I can always count on it to charge my batteries fully. Great Amazon price as well.

Canada on May 02, 2018

Troy: Really nice charger, I believe this company really takes pride in what they make. Only used it one boating season so far but have had zero issues and my batteries are always topped up. Even after a night of running off batteries and charger plugged it it keeps up really well to our usage. Now we are not huge users of power in our boat but, lights, stereo and running two cabin fans all night long and I still could start the boat with either battery easily. I will have voltmeters this upcoming season so I may add details later but if you are thinking about a charger I highly recommend

Canada on Feb 08, 2017

RC: I was a little skeptical at first, but went ahead with the purchase based on reviews. After unpacking the item, I was impressed. The enclosure is larger than I expected, but very well built and sealed. The leads are large guage wire and well-insulated. Although description states "on board" charger, the manual cautions against charging when in the vehicle without disconnecting ground lead. I did a bench test where i purposely used a bit of one battery and left the other fully charged. Then connected leads with the two negatives hooked together. As i expected, the charger separately sensed and properly maintained each battery independently.

I also very much liked the fact that the charger includes an electronic relay for charge output - this means when charger is de-energized (not plugged in to AC), there is no connection to the charger circuits. For protection of both charger and alternator, do not attempt to leave the charger plugged in while vehicle is in operation -- although there are protection mechanisms built in and it is very unlikely to cause damage, it is not recommended.

This charger is now installed in my truck which has a dual...

United States on Feb 02, 2017

Ray: This will fix problems in your battery's charge. I had wired 2 batteries in with a switch and used to charge the batteries by turning the switch to parallel and hooking the charger to one battery (basically like hooking positive to positive, negative to negative on the terminal). That worked decently well, but I knew it wasn't ideal. This charger charged one battery in about 2 hours using the smart technology and the other in about 4 days (on the first charge after hooking it up). Now, after a day of boating, I plug it in and the next day I'm good to go.

In short, I love that it has smart charging and works well. No problems

United States on Aug 29, 2016