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

Product Description

The CTEK SmartPass 120S is a professional 12V battery to battery charger and dual battery manager 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 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 intervention needed.
• Multi-Chemistry Support: Compatible with lead-acid, AGM, EFB, and GEL — covers all types of charger chemistries used in Indian vehicles.
• Wide Voltage Range (10.5–23V DC): Handles India's frequent voltage fluctuations, protecting your 12V charger battery investment.
• Temperature Resilience (–20°C to +50°C): Reliable from Rajasthan summers to 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 DC-DC power distribution logic to intelligently manage current flow between dual batteries without voltage drop or manual relay switching. Unlike a basic automatic charger or isolator, it monitors state-of-charge in real time, ensuring your 12 volt battery and charger system operates at peak efficiency. This is particularly valuable in Indian conditions where alternator output varies due to traffic-heavy, low-RPM urban driving. Pairing it with a solar input source makes it a future-ready solution for overlanders and fleet operators alike.

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 Mahindra Thar or Toyota Fortuner?

Yes — the SmartPass 120S works with any 12V lead-acid or AGM battery charger setup, making it compatible with most Indian SUVs and commercial vehicles.

How do I claim warranty in India?

Contact our support team via WhatsApp / Phone: +91 93112 11157 or hello@naredi.in with your order details and we'll guide you through the process.

Is Cash on Delivery available?

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

Can it handle India's voltage fluctuations?

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