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 designed for AGM, EFB, GEL, and lead-acid systems. It distributes up to 120A from your alternator or solar source between starter and service batteries — fully automatic, no manual switching required. Ideal for Indian SUVs, commercial fleets, and overlanding builds facing India's demanding roads and extreme climates.

Features & Benefits

• 120A Output: Rapidly charges large service banks — perfect for heavy-duty Indian commercial vehicles and caravans.
• Priority Charging Logic: Starter battery fills first; surplus flows automatically to service battery — zero manual intervention.
• Multi-Chemistry Support: Compatible with all types of charger chemistries — lead-acid, AGM, EFB, and GEL — covering the full range of Indian vehicle batteries.
• 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 sub-zero Himalayan winters.
• Overcharge & Discharge Protection: Built-in safeguards extend battery life — exceptional 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 and 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 intelligent DC-DC power distribution to manage alternator or solar input across dual battery banks without isolator relays or voltage drop losses. Its priority charging algorithm monitors both battery states simultaneously, ensuring the starter battery is never compromised while maximising service battery charge cycles. This architecture is especially valuable in Indian conditions where alternator output varies due to frequent idling in heavy city traffic and long high-load highway runs.

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
• 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 the Mahindra Thar or Toyota Fortuner?

Yes — the SmartPass 120S works with any 12V lead-acid or AGM battery charger system, covering virtually all Indian SUVs and commercial vehicles.

How do I claim warranty in India?

Contact naredi via WhatsApp / Phone: +91 93112 11157 or hello@naredi.in Monday–Saturday, 9 AM–6 PM IST.

Is Cash on Delivery available?

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

Can this be used with a solar panel setup in India?

Absolutely — it pairs directly with the CTEK D250SA for a complete solar and automotive charger system, ideal for off-grid or overlanding use.