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The NOCO Genius GENPRO10X4 is a 4-bank onboard battery charger that puts 10 amps into each of up to four 12V batteries, 40 amps total, for marine, RV and multi-battery setups. Each bank runs independently with 12V, AGM, lithium and repair modes, and the sealed IP68 case can be mounted in any orientation. It charges batteries down to 1 volt and can recover zero-volt batteries in Force Mode. The best new price is $424.95 at Walmart as of November 5, 2026, with two stores listing it new.
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Lowest price we've seen: $424.95 on Nov 6 at Amazon. Tracked across 1 store since Nov 6.
Rated 4.8 out of 5 from 19 ratings, buyers largely report the GENPRO10X4 does what a multi-bank onboard charger should: keeps several batteries topped up independently and survives a wet, vibrating engine room.
The NOCO GENPRO10X4 is the ultimate 4-bank onboard marine battery charger, delivering 40 amps of total power—10 amps per bank—for charging and maintaining up to four 12-volt batteries rated up to 230 amp-hours each. Built for professionals, this charger supports all battery chemistries, including lead-acid and lithium-ion, and is ideal for complex marine, RV, and multi-bank setups. Each bank operates independently with selectable charging modes—12V, 12V AGM, 12V Lithium, and 12V Repair Mode—and features advanced thermal compensation to maintain optimal charging in any climate. Able to charge batteries down to 1-volt, or activate Force Mode to recover zero-volt batteries, the GENPRO10X4 ensures complete control and unmatched reliability. Housed in a fully sealed, IP68-rated enclosure built to withstand full submersion, shock, and vibration, this charger installs easily in any orientation thanks to its anti-vibration mounting design. Certified to UL1236, ISO 8846, and compliant with 33 CFR 183.410, the GENPRO10X4 is the most powerful and dependable multi-bank charger in its class. Included in the box is the GENPRO10X4 40-Amp 4-Bank charger with 72-inch DC cables featuring 3/8-inch (M10) eyelets, a 72-inch Type-B AC cable, eight self-tapping mounting screws, a user guide, and a 3-year warranty.
