ProMariner ProIso Charge 250 0 Voltage Loss Isolator 12v 1 Alternator 3 Batteries

Meet the ProMariner ProIsoCharge250 Zero Volt Loss Isolator for 12V systems—a digital, intelligent charging solution that protects your engine start battery while smartly distributing the full output of a single alternator to up to three independent battery banks.

• System Voltage: 12vDC
• Alternator Input: 1
• Battery outputs: 3
• Dimensions: 8.875"(l) × 5.875"(w) × 3.125"(h)
• Max DC Amps: 250
• Zero Volt Loss Isolation: true zero-volt loss isolation replaces traditional diode-based isolators to minimize energy drain and maximize efficiency
• Digital Performance: all-digital design provides active battery status and engine battery health priority while distributing the full alternator output
• Intelligent Charging Software: prioritizes charging to a loaded battery bank by taking fully charged banks offline, while preserving engine battery health
• Ignition Controlled On-Demand: battery bank management activates only with ignition power on, protecting starting batteries when the boat isn’t running
• Advance Regulator Ready: remote sense connection provides precision control for alternators equipped with an advanced regulator
• Easy Installation: modular design for straightforward setup, including all terminal stud insulator boots and a protective snap-on safety cover
• Built-In Safety: ignition-protected and IP66 waterproof rugged construction keeps charging operation secure in harsh marine environments
• Multi-Bank Charging: isolates and charges up to 3 independent battery banks from a single alternator (model-specific); dual-engine boats can use an exclusive 2-input model to support up to 4 banks
• Space & Wiring Efficiency: eliminates traditional diode-based isolators and voltage-sensitive relays/solenoids, reducing space and wiring complexity while preventing voltage loss
• Shore Power Ready: designed to pair with ProNauticPSeries shore power systems for comprehensive on-the-water charging

With ProIsoCharge250, you gain faster charge times, smarter power management, and more time on the water. It protects your engine battery while ensuring house/inverter banks receive the full output of your alternator, improving reliability and simplifying wiring in a compact, marine-ready package.