The CTEK SmartPass 120S is a high-performance DC/DC battery charger and energy manager designed to optimize charging and power distribution in dual-battery systems. With the included installation kit, it’s easy to install in vehicles, boats, or RVs, ensuring that your auxiliary batteries are charged safely and efficiently while protecting your starter battery. Ideal for 12V systems with LiFePO4 or lead-acid batteries, SmartPass 120S maximizes battery life and ensures reliable power delivery for all onboard electronics.

Key Features

• ✅ Dual-Battery Charging – Simultaneously charges starter and auxiliary batteries.

• ✅ Advanced Energy Management – Protects starter battery while powering loads from the auxiliary battery.

• ✅ Smart Alternator-Friendly – Compatible with modern smart alternators without overloading the system.

• ✅ Versatile Battery Compatibility – Works with LiFePO4, AGM, Gel, and conventional lead-acid batteries.

• ✅ Installation Kit Included – All cables, fuses, and connectors included for quick and safe setup.

• ✅ Compact & Robust Design – Weather-resistant casing and vibration-proof for harsh environments.

Specifications

• Input Voltage: 12V DC

• Output Current: Up to 120A (peak), controlled DC-DC charging

• Battery Compatibility: LiFePO4, AGM, Gel, Lead-Acid

• Operating Temperature: -20°C to +50°C (-4°F to 122°F)

• Protection Rating: IP65 – water and dust resistant

• Dimensions: 177 x 100 x 51 mm

• Weight: 1.3 kg

Applications

• Dual-battery systems in cars, trucks, RVs, and off-road vehicles

• Boats and marine auxiliary battery setups

• Solar or renewable energy systems with 12V storage batteries

• Emergency power systems and mobile workshops

Why Choose the CTEK SmartPass 120S?

• Ensures optimal battery health for starter and auxiliary batteries

• Maximizes power efficiency for electronics and onboard systems

• Compatible with modern smart alternators and various battery chemistries

• Trusted by professionals for reliable, long-term performance

• Complete installation kit included for fast, safe setup

Installation Instructions