Built for boats with multiple battery systems, this 3-bank marine charger delivers strong, charging power across three separate 12V batteries at the same time. With 10 Amps available per bank, it keeps starting, house, and auxiliary batteries charging simultaneously without slowing down performance or sharing output. Each bank runs completely on its own, meaning one deeply discharged battery can charge at full power while the others stay in maintenance mode. ISM automatically manages the full charging process for each bank, helping keep batteries healthy without any manual adjustments. Designed for real marine conditions, this unit is UL marine ignition protected for safe use in enclosed or fuel-adjacent compartments. Its fully sealed construction and multi-bank setup make it a reliable choice for boats that depend on multiple battery systems running at once. Features:• 10 Amps per bank independent charging• 3-bank simultaneous battery charging• UL marine ignition protection certified• Supports lithium and lead-acid batteries per bank• ISM smart 4-stage charging systemSpecs:• Output: 12V, 30 Amp total (10A per bank)• Battery Range: 20Ah â 200Ah per bank• Battery Types: AGM, GEL, Flooded, Sealed Lead-Acid, LiFePO4• Protection Rating: UL marine ignition protected, IP67+ sealed housing• Charging System: ISM automatic multi-stage control ISM smart charging system 3 independent battery banks UL marine ignition protection | Battery Tender WaveCharge Pro 3-Bank 12V 30 Amp BC & Maintainer