Battery Tender® 4-Bank Selectable 12V or 6V, 12 AMP Battery Charger

Four battery banks. Four independent ISM charging circuits. The Battery Tender® WaveCharge 4-Bank is the complete on-board charging solution for boats and vehicles with complex multi-bank electrical systems — delivering 3 Amps per bank simultaneously to up to four separate 12V batteries, each running its own ISM (Infinite Sequential Monitoring™) cycle with its own chemistry profile, independently.

Four-Bank Charging for Marine and Automotive Applications

Large powerboats, extended-range cruisers, overlanding expedition builds, and custom commercial vehicles running four independent battery banks need four independent charging circuits. The WaveCharge 4-Bank handles all four simultaneously with no output sharing and no inter-bank interference. Each bank charges at its own rate, in its own stage, at its own chemistry setting — exactly as if each battery had its own dedicated charger.

Full 3 Amps Output on Every Bank Simultaneously

No bank divides its output with any other. Four independent 3 Amp circuits run simultaneously at full output regardless of what the other banks are doing. A bank in bulk charge recovering a depleted auxiliary battery operates at full 3 Amps without reducing output to the three banks in float maintenance. Complete independence across all four banks at all times.

Multi-Chemistry: Lead-Acid and Lithium Per Bank

Each of the four banks has its own chemistry selector. A boat or vehicle running two lead-acid banks and two Lithium banks configures each bank independently — the correct ISM profile for each chemistry on each bank, all running simultaneously at full 3 Amps output.

ISM: 4-Stage Charging on All Four Banks

• Initialization — Individual health check before current flows on each bank
• Bulk Charge — Full 3 Amps output per bank independently restores depleted capacity
• Absorption — Current tapers per bank as each battery approaches full charge
• Float Maintenance — Correct protocol for lead-acid or Lithium on each bank, 24/7, indefinitely

Compatible per bank: 14Ah to 100Ah at 12V. Lead-acid: flooded, AGM, gel cell, sealed MF. Lithium: LiFePO4.

IP67 Marine and Weatherproof Construction

IP67 certified for complete dust protection and water immersion resistance. Designed for permanent installation in engine compartments, battery bays, and below-deck or under-vehicle locations where moisture, condensation, and spray are routine operating conditions.

Applications

• Large powerboats and cruisers with four-bank electrical systems
• Boats with separate starting, house, bow thruster, and trolling or anchor winch batteries
• Overlanding and expedition vehicles with four independent battery circuits
• Commercial trucks and fleet vehicles with complex multi-bank setups
• Camper vans and custom builds requiring simultaneous maintenance of four battery banks
• Any four-bank 12V application with any combination of lead-acid and Lithium chemistries

Automatic Temperature Compensation

All four banks adjust charge voltage automatically based on ambient temperature for lead-acid applications — ensuring complete charging and preventing overcharge across all banks in any environment.

Safety Features

• Spark-proof connection on each bank
• Reverse polarity protection per bank — incorrect connection on one bank does not affect the remaining three
• Short-circuit protection per bank
• IP67 sealed housing

2-Year Limited Warranty | DeLand, Florida Since 1965