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DC\DC Power System

CTEK Onboard Charging Solution Just Got Even Smarter!

The ever increasing issues of larger power requirements, restrictions on space and weight, together with more complex vehicle technology and different battery
chemistry mean smarter, more flexible and more effective solutions to on-board battery charging are needed – to give you peace of mind, whether it’s work, rest or play.

To meet these increasingly complex power demands CTEK has launched the CTEK D250SE (a 20A DC/DC battery charger) and the CTEK Smartpass 120S (a 120A power management system), giving you the ultimate onboard power solution – compatible with all 12V service batteries, including lithium (12V LiFePO 4 ).



Compatible with smart alternators, the D250SE delivers a powerful 20A of power to charge, condition and maintain any 12V service battery while on the move. Its dual input capability means it can also draw power from solar sources.

The D250SE features:

FLEXIBLE CHARGING - Built-in temperature sensor compensates for hot or cold conditions, so your batteries are fully charged in the shortest possible time without the risk of over or undercharging. It has three specially developed charging modes; normal (14.4V), AGM (14.7V) and lithium (12V LiFePO 4 ).

DIRECT CONNECTION FOR SOLAR POWER - Input for connecting solar panels without the need for a regulator. It also features a Maximum Power Point Tracker (MPPT) to get the maximum power out of your solar panels.

SMART ALTERNATOR COMPATIBILITY - Smart alternators deliver a variable output and are shut off when they’re not needed. The D250SE will still operate even when there is low alternator output, and maintain a stable output of up to 20A to fully charge your battery in the shortest time.

Smartpass 120S

A fully automatic 120A power management system that distributes power between the starter battery, the service battery and onboard equipment, without the need for traditional diodes or VSR relays.

The Smartpass 120S features:

SMART ALTERNATOR COMPATIBILITY - Continuing to deliver power to the service battery even when there is low alternator output.

CURRENT SOURCE PRIORITY - Supplies power to critical equipment directly from the alternator when the engine is running. This means critical functions like starters, radios, emergency lights and communication systems always have the power they need and take priority over non-critical functions.

START ASSISTANCE - Uses power from your service battery to help get your engine started if your starter battery is flat.

Both the D250SE and the Smartpass 120S are splash and dust proof and meet IP65 standards. Each unit comes with a two-year warranty.

“Having owned several of another ‘popular’ brand of charger, the CTEK is far and above superior in every possible category. WELL worth the miniscule additional cost. ”