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D250S Dual Battery Charger - by CTEK

The D250S DUAL automatically selects the best connected DC energy source (of 2) for the purpose and switches between these energy sources to achieve high-efficiency, multi-stage, charging. The D250S DUAL is particularly suitable for charging caravans, motor caravans, boats and second homes that do not have access to grid power supplies. Charging automatically starts as soon as DC energy is provided to the charger, such as from alternators when a vehicle is started or from solar panels when connected. The D250S DUAL has a temperature sensor which ensures optimal charging voltages at all temperatures. The D250S DUAL ensures that your batteries are always in good condition, quick charging and long battery lifetimes.

The D250S DUAL is a fully automatic 5-stage charger that supplies 20A to 12V batteries of 40-300Ah. The charger is IP65 classified (water jet and dust protected and approved for outdoor use), protects vehicle electronics and is suitable for all types of lead-acid batteries (Wet, MF, Gel, AGM). It is supplied with a 2 year guarantee.

Male terminal (grey) 2pcs 14,5 mm
Male terminal (black) 2pcs 14,5 mm
Temperature sensor

Consists of:
1 x Ctek D250SA Unit
Installation Hardware
User Manual

Product Dimensions:
270mm (10.6") L x 142mm (5.6") W x 75mm (3") H

1Kg (2.2lbs)

Special Notes:
Input: 11.5-23V, 25A
Output: 14.4V,20A max
Back current drain: Corresponding to less than 1Ah/month
Ambient temperature: -20˚C to +50˚C (-4°F to +122°F)
Battery types: All types of lead-acid batteries, 12V, WET, MF, Ca/Ca, AGM, EFB, GEL
Battery capacity: 40-300Ah
Warranty: 2 years
Insulation class: IP65
Ripple: Less than 4%

*A PDF viewer is required to view the fitting instructions.

Product Questions

I have a Land Cruiser and I have a National Luna deep cycle battery installed. My vehicle is currently standi for long periods of time and I am looking for a solution which will keep both my primary and secondary battery charged,obviously using the power supplied from the electricity in my home.
Question by Ghalieb Jardien
A 0.8ah C-tek trickle charger will be perfect but, if you connect the charger to the main battery, the national Luna battery system will activate, and to leave it on for too long will damage the system. My suggestion will be to get two of these small trickle chargers, one for each battery, and disconnect the Luna system from the batteries when connecting the trickle chargers.
Answer by Front Runner

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