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

Product Description

The CTEK SmartPass 120S is a professional-grade automatic charger and dual battery manager designed for 12V lead-acid and AGM systems. As an advanced automotive charger, it intelligently distributes up to 120A from your alternator or solar source across two batteries — no manual switching needed. Purpose-built for Indian SUVs, commercial fleets, and overlanding rigs battling voltage fluctuations and monsoon humidity.

Features & Benefits

• 120A Output: Rapidly charges large service banks — ideal for heavy-duty trucks on Indian highways.
• Priority Charging Logic: Starter battery fills first; surplus power flows automatically to the service battery.
• Multi-Chemistry Support: Compatible with lead-acid, AGM, EFB, and GEL — every automotive charger setup in India covered.
• 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 off-grid system.

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 – 12V Dual Battery Manager, AGM & Lead-Acid vs Generic Alternatives

Understanding the Technology

The SmartPass 120S uses DC-DC battery-to-battery charging logic combined with intelligent load-sharing algorithms to regulate current distribution between a starter and service battery without voltage drop or overload. Unlike a simple isolator relay, it maintains optimal state-of-charge (SOC) on both banks simultaneously. This is particularly critical in India where alternator output can fluctuate due to accessory loads and stop-start city traffic. The result is a longer battery lifecycle and reduced roadside breakdown risk.

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
• Returns: 14-day return and exchange policy, COD returns accepted
• Delivery: Free delivery across India, Cash on Delivery available

Frequently Asked Questions

Is this battery charger compatible with Indian vehicles like Mahindra Scorpio or Tata trucks?

Yes — the SmartPass 120S works with any 12V lead-acid or AGM system, including all popular Indian SUVs, commercial vehicles, and caravans.

Iska cost batao — is it worth the price in India?

The SmartPass 120S protects both batteries from premature failure, saving you thousands of ₹ in replacement costs over time — excellent long-term value.

How do I claim warranty in India?

Contact us via WhatsApp / Phone: +91 93112 11157 or hello@naredi.in with your purchase details — we'll guide you through the process in English or Hindi.

Is Cash on Delivery available?

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