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

Product Description

The CTEK SmartPass 120S is a professional 12V dual battery manager and automatic charger built for AGM and lead-acid systems. It automatically distributes up to 120A from your alternator or solar source between starter and service batteries — no manual switching required. Ideal for Indian SUVs, commercial fleets, and overlanding builds tackling demanding roads and climates across India.

Features & Benefits

• 120A Output: Rapidly charges large service battery banks — perfect for heavy-duty Indian commercial vehicles and caravans.
• Priority Charging Logic: Starter battery charges first; surplus flows automatically to the service battery — zero manual intervention.
• Multi-Chemistry Support: Compatible with lead-acid, AGM, EFB, and GEL — covers all types of charger needs across Indian vehicles.
• Wide Voltage Range (10.5–23V DC): Handles India's frequent voltage fluctuations, protecting your 12V battery charger investment.
• Temperature Resilience (–20°C to +50°C): Reliable from scorching Rajasthan summers to freezing Himalayan winters.
• Overcharge & Discharge Protection: Built-in safeguards extend battery life — outstanding long-term value for money.
• D250SA Compatible: Pairs with CTEK D250SA for a complete solar and automotive charger system for 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 12V battery-to-battery 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 combined with voltage-sensitive relay logic to manage power distribution intelligently between dual battery banks. Unlike basic isolators, it monitors state-of-charge continuously and prioritises the starter battery before diverting surplus current downstream. This makes it uniquely suited to Indian conditions where alternator output and solar input can vary significantly. The result is a longer battery lifespan and a more reliable automotive charger system overall.

Warranty & Support in India

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

Frequently Asked Questions

Is this compatible with Indian SUVs and commercial vehicles?

Yes — it works with any 12V lead-acid, AGM, EFB, or GEL battery system, covering most Indian SUVs, trucks, and fleet vehicles.

Can it handle India's voltage fluctuations?

Absolutely — the wide 10.5–23V DC input range and built-in protection handle Indian power and alternator inconsistencies reliably.

How do I claim warranty in India?

Contact Naredi directly via WhatsApp / Phone: +91 93112 11157 or hello@naredi.in with your order details to initiate a warranty claim.

Is Cash on Delivery available?

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