Dual Pro PS4 Auto 15A - 4-Bank Lithium/AGM Battery Charger

The Dual Pro PS4 Auto 15A 4-Bank Lithium/AGM Battery Charger is a professional-grade marine charging system designed to automatically manage both lithium and AGM battery banks on modern offshore and inshore vessels. Unlike single-chemistry chargers that require manual switching or separate units, the PS4 Auto detects battery chemistry on startup and applies the correct charging algorithm without operator intervention—critical when managing multiple independent systems on larger boats where downtime for battery maintenance directly impacts fishing schedules and safety margins.

The 15-amp charging capacity across four independent banks means simultaneous charging of engine start batteries, house bank systems, and auxiliary power circuits at full rated output—each bank monitors and protects independently. The charger's startup algorithm includes a low-battery recovery feature that wakes dormant batteries that have switched into protection mode, eliminating the frustration of dead-looking batteries that simply need a diagnostic reset. Dual Pro's algorithms are validated directly with battery manufacturers, ensuring that lithium cells receive the precise voltage profile they demand (avoiding the overcharge conditions that degrade LiFePO4 packs) while AGM batteries get the controlled absorption and float stages required for deep-cycle performance. Built for the weight and dimensional envelope of serious boats, the unit measures 11 × 11 × 19 inches and weighs 32.5 pounds—substantial enough to handle commercial-grade charging loads while fitting in engine rooms with standard component spacing.

This charger is engineered for captains running mixed battery installations—boats transitioning to lithium house banks while retaining traditional AGM engine-start systems, or larger vessels with redundant power architecture across multiple cabins and systems. Weekend fishermen benefit from automated intelligence that replaces guesswork; offshore operators appreciate the reliability and protection that comes from manufacturer-validated charging profiles. The four-bank topology scales to accommodate growth, whether adding a second generator charging circuit, auxiliary thruster power, or bow-thruster lithium upgrades down the line.