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Genius Onboard Waterproof Marine Battery Charger, 20A, 12Volt, 2Bank (GENPRO10X2)
Engineered by NOCO GENPRO10X2 20 amps total (10 amps per bank) to handle dual-battery systems such as marine boats, starter and deep-cycle batteries.
Compatible with multiple chemistries – including Wet (flooded), Gel, Maintenance-Free (MF), AGM, EFB, Calcium and Lithium (Li-ion / LiFePO₄ with a BMS) – giving you one charger to support all your battery types.
Includes select modes per bank: 12 V Standard, 12 V AGM, 12 V Lithium, and a specialized 12 V Repair mode (for desulfating or reviving idle/stratified batteries) for intelligent maintenance.
Precision charging with thermal compensation: Built-in thermal sensor monitors ambient temperature and adjusts charging automatically to prevent under-charging in cold climates (down to –4 °F) and over-charging in hot conditions (up to 104 °F).
Rugged, marine-ready build: Fully sealed, IP68 rated for dust and water immersion, meaning this charger is designed to be installed in boats and harsh environments, even surviving “thousands of hours underwater” per manufacturer testing.
Compact form factor for ease of installation: Compared with the prior GEN2 model, this version is 19 % smaller yet outputs 33 % more power. Simplified mounting system allows installation in virtually any orientation—including upside-down—and includes anti-vibration backing to isolate shock, vibration and noise.
Chargers batteries down to extremely low voltages: It detects batteries as low as 1 V and has a Force Mode to begin charging from zero volts (for deeply discharged batteries).
Supports large battery banks: Rated for 12 V batteries up to approximately 230 Ah.
Adds advanced safety features including protection against reverse polarity, spark-proofing, short-circuit, over-current, open circuit and over-heating conditions for worry-free 24/7 operation.
Extended warranty: 3-year limited warranty when product is registered with manufacturer.
What’s in the box: Charger unit, two self-tapping mounting screws, user guide and warranty registration information.
Why this charger stands out:
Ideal for:
Marine boats (dual battery systems for engine start + house bank)
RVs and campers with dual-battery setup
Deep-cycle battery banks for trolling motors, onboard electronics
Fleets or equipment that need continuous charge maintenance in harsh environments
Lithium battery users (12 V) seeking a high-quality onboard charger
Quick usage tips:
Mount it in a dry, ventilated but protected area – the IP68 rating allows for harsh exposure, but proper ventilation and installation length for cable runs still matter.
Select the appropriate charging mode for your battery chemistry (Standard, AGM, Lithium, Repair) to maximize battery life.
If charging a deeply discharged battery (<1 V), use the Force Mode to begin charging then revert to standard mode once above threshold.
After full charge, leave connected – the charger will switch to maintenance/float mode automatically, eliminating over-charging risk.
Ensure AC input is available (120-240 V AC) and run mounting screws through the anti-vibration backing for secure install in mobile/watercraft settings.
Elevate your battery-charging game with this marine-grade, dual-bank charger – rugged, smart and built for demanding environments.
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WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov .
