CTEK SmartPass 120S – 12V Dual Battery Manager, AGM & Lead-Acid

Product Description

The CTEK SmartPass 120S is a professional-grade automatic charger and 12V dual battery manager designed for AGM and lead-acid systems. It distributes up to 120A from your alternator or solar source across two batteries — fully automatic, zero manual switching. Purpose-built for Indian SUVs, commercial fleets, and overlanding rigs facing everything from Rajasthan heat to Himalayan cold.

Features & Benefits

• 120A Output: Rapidly charges large service banks — ideal for heavy-duty Indian trucks and caravans.
• Priority Charging Logic: Starter battery fills first; surplus flows automatically to the service battery.
• Multi-Chemistry Support: Compatible with lead-acid, AGM, EFB, and GEL — covers virtually every automotive charger setup in India.
• Wide Voltage Range (10.5–23V DC): Handles India's frequent voltage fluctuations without damaging batteries.
• Temperature Resilience (–20°C to +50°C): Reliable from Ladakh winters to Chennai summers.
• Overcharge & Discharge Protection: Built-in safeguards extend battery life — exceptional value for money.
• D250SA Compatible: Pairs with CTEK D250SA for a complete solar and automotive charger system in off-grid builds.

Detailed Specifications

How To Use

1. Mount the unit in a ventilated spot near your battery compartment.
2. Connect input terminals to your alternator or DC source (10.5–23V).
3. Wire output terminals to starter and service batteries respectively.
4. Power on — fully automatic charger operation begins immediately.

What's Included in the Box

• CTEK SmartPass 120S Unit
• Mounting hardware
• User manual

Comparison: CTEK SmartPass 120S vs Generic Alternatives

Understanding the Technology

The SmartPass 120S uses DC-DC power distribution to intelligently manage current flow between a primary alternator source and two separate battery banks without relay-based switching. Unlike a conventional car battery charger, it operates as a dynamic current router, responding in real time to each bank's state of charge. This makes it the preferred choice for dual-battery systems in Indian overlanding vehicles and commercial fleets where reliable, maintenance-free power management is critical.

Warranty & Support in India

• Warranty: 2-year manufacturer warranty against defects
• Customer Support: Monday–Saturday, 9 AM–6 PM IST. WhatsApp / Phone: +91 93112 11157 · hello@naredi.in (English & Hindi)
• Returns: 14-day return and exchange policy, COD returns accepted
• Delivery: Free delivery across India, Cash on Delivery available

Frequently Asked Questions

Is this compatible with Indian SUVs like Mahindra Thar or Force Gurkha?

Yes — any 12V vehicle with an alternator output of 10.5–23V DC is compatible, including popular Indian 4x4s and commercial vehicles.

How do I claim the warranty in India?

Contact our team via WhatsApp / Phone: +91 93112 11157 or hello@naredi.in with your purchase details and we'll assist you promptly.

Is Cash on Delivery available?

Yes, COD is available across India with free delivery to all serviceable pin codes.

Can this work with a solar panel setup?

Absolutely — the SmartPass 120S accepts input from solar sources and pairs seamlessly with the CTEK D250SA for a complete off-grid automotive charger system.