CTEK D250SE, 12V, 20A, Dual Battery Management System With Solar Control

CTEK D250SE 12V 20A Dual Battery Management System with Solar Control

The CTEK D250SE is a fully automatic, 5-step charger that delivers up to 20A of power to any 12V lead-acid or lithium service battery ranging from 40–300Ah. Designed for vehicles equipped with dual battery systems, it efficiently manages charging from both alternator and solar sources, ensuring your service battery remains optimally charged during travel.​

Features and Benefits

• Dual Input Capability: Simultaneously charges from alternator and solar panel inputs, providing flexible charging options.​
• Smart Alternator Compatibility: Works seamlessly with modern vehicles equipped with smart ECU-controlled alternators.
• Solar Panel Regulator with MPPT: Incorporates a Maximum Power Point Tracking (MPPT) solar regulator to maximize solar energy utilization.
• Selectable Charging Profiles: Offers user-selectable charging profiles for various battery types, including AGM and lithium (LiFePO₄), ensuring optimal charging parameters.
• Temperature Compensation: Includes a temperature sensor to adjust charging based on ambient conditions, enhancing battery life and performance.​
• Battery Separation Function: Eliminates the need for diodes and VSR relays by effectively separating starter and service batteries.​

Specifications

• Input Voltage Range: 11.5–23V, 25A

Output Voltage:

• Lead-acid batteries: 14.4V/14.7V, 20A max
• LiFePO₄ batteries: 14.2V, 20A max
• Battery Capacity Compatibility: 40–300Ah
• Operating Temperature: -20˚C to +50˚C (-4°F to +122°F)
• Insulation Class: IP65 (splash and dustproof)
• Weight: Approximately 0.7 kg (unit with cables)​

Frequently Asked Questions (FAQ)

Q: Is the CTEK D250SE compatible with lithium batteries?

A: Yes, the D250SE has a selectable lithium (LiFePO₄) charging mode, making it suitable for charging 12V lithium service batteries.

Q: Can the D250SE charge my service battery using solar panels?

A: Absolutely, it features a built-in MPPT solar regulator that optimizes solar energy conversion to efficiently charge your service battery

Q: Is this charger compatible with vehicles that have smart alternators?

A: Yes, the D250SE is designed to work with modern vehicles equipped with smart ECU-controlled alternators.

Q: What types of batteries can the D250SE charge?

A: It can charge various 12V battery types, including WET, MF, Ca/Ca, AGM, EFB, GEL, and LiFePO₄. 

Q: Does the D250SE require manual switching between charging sources?

A: No, it automatically manages charging between alternator and solar inputs, prioritizing solar energy when available for efficient charging.

• Battery Support On the Go: The D250SE is a fully automatic, on-board charger that supplies up to 20A of power to any 12V lead-acid or lithium* service battery from 40–300Ah. It has selectable charge algorithms for AGM and 12V lithium batteries (*12V LiFePO4).
• Smart Alternator Compatible: Full functionality with all types of alternator.
• Achieve Maximum Power from Your Solar Output: Solar Panel Regulator with Maximum Power Point Tracking (MPPT) optimises available power.
• Charge Service and Starter Batteries: When the service battery is fully charged, the D250SE will automatically redirect maintenance charge power to the starter battery.
• Built-In Temperature Sensor: Allows you to achieve maximum charge levels, no matter what the temperature.