CTEK D250SE DCDC 12V 2-input charger

The CTEK D250SE DCDC 12V charger is a dual-input 20 A device designed to optimise battery charging. This fully automatic 5-stage charger delivers a constant output of 20 A to all 12 V service batteries, whether lead-acid or lithium, with capacities between 40 and 300 Ah. Its adjustable charging algorithms adapt perfectly to AGM and lithium batteries. Its dual input allows it to use energy from the alternator, solar panels or wind power.

When the service battery is fully charged, the D250SE automatically switches to maintenance charging for the starter battery. It provides a stable supply up to 20 A, even in vehicles with ECU-controlled smart alternators. An integrated temperature sensor also ensures optimised charging in all weather conditions.

Key features:

• Battery isolation replacing diodes and VSR relays
• AGM option with voltage of 14,4 V or 14,7 V
• Optimised charging to extend battery life and improve performance
• Temperature sensor to compensate for weather variations
• Splash- and dust-proof (IP65)
• Compatible with SMARTPASS 120 and SMARTPASS 120S for optimum 140 A energy management

Technical data:

• Input: 11.5–23 V, 25 A
• Output: 14.4/14.7 V, 20 A for lead-acid batteries; 14.2 V, 20 A for LiFePO4
• Battery capacity: 40–300 Ah
• Leakage current: Less than 1 Ah/month
• Operating temperature: -20 C to +50 C (-4 F to +122 F)
• Ripple: Less than 4 %
• Compatible battery types: 12 V WET, MF, Ca/Ca, AGM, EFB, GEL, LiFePO4
• Protection rating: IP65
• Gross weight: 0.9 kg
• Dimensions: 192 x 110 x 65 mm
• Net weight: 0.7 kg
• MPPT technology: Yes