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
$129.99
Price: $129.99
(as of Feb 12, 2026 03:58:41 UTC – Details)
The NOCO GEN5X2 is a fully-sealed, waterproof onboard battery charger rated at 10 amps total—5 amps per bank—designed for 12-volt lead-acid and lithium-ion batteries, including flooded, AGM, gel, and LiFePO₄ chemistries. It’s 37% smaller and delivers 43% more power than the previous-generation GENM2, making it our most compact and advanced charger yet. Each bank operates independently, allowing you to precisely charge and maintain two batteries simultaneously, even if they differ in type or condition. Selectable charging modes—12V, AGM, Lithium, and Repair Mode—offer tailored charging for battery health and longevity, while an integrated thermal sensor automatically adjusts charging in hot and cold climates to prevent overcharging or undercharging. For severely discharged batteries, Force Mode lets you manually begin charging from zero volts, a critical advantage for recovering deeply neglected batteries that other chargers can’t detect. Engineered for the harshest marine environments, the GEN5X2 features an IP68 rating and has endured brutal life cycle testing, including thousands of hours underwater. Installation is fast and secure in any orientation—even upside down—thanks to a redesigned mounting system with an integrated anti-vibration backing that isolates shock and noise. The GEN5X2 comes with 72-inch DC cables with 3/8-inch eyelets, a 72-inch Type-B AC cable, two mounting screws, and a user guide. It’s backed by a 3-year warranty, engineered in the USA, and certified to UL1236, ISO 8846, and 33 CFR 183.410 for safety, ignition protection, and marine compliance.
MEET THE GEN5X2 — 37% smaller and 43% more powerful than the GENM2. It’s our most compact and advanced onboard charger yet—engineered for peak performance in the harshest marine environments.
MULTIPLE BANKS — A two-bank onboard battery charger rated at 10 amps total – 5 amps per bank. Independently charge 12V batteries in marine, boat, starter, and deep-cycle systems.
CHARGING MODES — Selectable modes for each bank: 12V, 12V AGM, 12V Lithium, and 12V Repair Mode. Independently charge and maintain all types of lead-acid and lithium-ion batteries with precision.
ENJOY PRECISION CHARGING — An integrated thermal sensor adjusts charging based on ambient temperature, preventing overcharging in heat and undercharging in cold for optimal battery performance.
CHARGE DEAD BATTERIES — Charge batteries from as low as 1 volt, or use Force Mode to manually begin charging batteries down to zero volts to recover deeply discharged or neglected batteries.
REDEFINED MOUNTING — A simplified mounting system allows for fast, secure installation in any orientation – even upside down – with an integrated anti-vibration backing to isolate shock and noise.
DESIGNED FOR WATER — A fully-sealed onboard charger rated IP68 for waterproof protection. Survives brutal life cycle testing, including thousands of hours underwater in the harshest marine conditions.
WHAT’S IN THE BOX — GEN5X2 10A 2-bank onboard charger with 72-inch DC cables and 3/8-inch eyelets, 72-inch AC cable (Type-B), and two mounting screws. Backed by a 3-year warranty and engineered in the USA.
13 reviews for 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
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Ryan Detloff –
Easy install, good quality
Easy to install. Works great and so much easier that taking out boat batteries to charge every time.
Trade Jack –
Great tender.
NOCO is my go to. Have this mounted in a dual battery 2500 diesel. Works great. You may need to purchase post extenders if you have a side post battery like me.
Customer –
Great replacement the old branded battery tender plus
I used these for cars that sit in storage during winter. Compared to the battery tender plus it seems better built and charges faster. Appreciate the agm mode and the on off button. I would just leave it plugged in with the battery tender but this one one can actually turn it off without unplugging. Got it on sale and think it’s a great upgrade
coolj10009 –
On Board Boat Charger
I have other of their charges and they work great. One thing i wish is the leads were a little longer or it was possible to add extensions like their other chargers. When i installed i wasnt able to mount it where i planned as the leads weren’t long enough. When i plugged it in the first time it only went to standby. I had to select the type of battery for it to start. At first i was pissed as i thought i would have to climb on the boat and do this every time. I actually left a 3 star review. After charging the battery going on the lake and then plugging the batteries up the charger came right back on to the same setting and charged without making the selection again. So im changing to 5 stars as im really happy they set this charger up this way as i was planning to purchase and install another charger so i didnt have to go into engine bay to turn on every time.
Amazon Customer –
So far so good. Easy to install.
So far so good. I installed it, had to use velcro to stick it to one of the batteries. It only showed 1 bar, but this morning they were(2) green. Fired up! We’ll see what happens when the temperature drops into the teens?
hollandbr2 –
Potential Issue w/ 1 Bank Failing For Some but Great Warranty
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.
Laura C –
Perfect set up for my 2 battery boat
Works great, takes very little space. Makes life a lot easier for a boat that is not used as regularly as we all would like. So easy to top off you batteries without carrying around a charger! I trust this brand too, due to previous experience with them.
Chico –
Do the research, no disappointments
This technology surpasses 99.9 of the others out there. Works perfectly. excellent quality. Having multiple choices is a huge plus nowadays with the different types of batteries available. very good selling point.
Jorge Alfredo Batarse Bandak –
Funciona muy bien y es exactamente lo que pedí
Toni O –
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.
Remote buyer –
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
Ali Simmons –
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.
Evan R –
Easy to install, works perfect.