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Overview

The CTEK D250SE is a fully automatic 12V DC/DC battery charger designed for dual-battery systems in vehicles, RVs, boats, and off-grid setups. With a robust 20A charging capacity, it ensures your service battery remains charged using power from both the alternator and solar panels. Its advanced features, including selectable charging modes for lead-acid and lithium batteries, make it an ideal solution for maintaining optimal battery health in demanding environments.

CTEK D250SE 12V Dual Input 20A Charger

Model: D250SE
Web Code: 19866672
Sold and shipped by | 4.2 seller rating (95 reviews)

Available for deliveryAvailable online only

Delivery times vary by location. Most Marketplace items leave sellers' locations within 2 business days. Allow additional time for shipping.

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Seller Return Policy

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Warranty

Check with the manufacturer for details.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

• Dual Input Charging: Accepts power from both the alternator and solar panels, ensuring continuous charging.

• 20A Fully Automatic Charging: Provides up to 20A of power to 12V lead-acid or lithium service batteries ranging from 40–300Ah.

• Selectable Charging Modes: Offers charging algorithms for AGM and lithium batteries, with options for 14.4V or 14.7V for AGM batteries and 14.2V for lithium batteries.

• Maximum Power Point Tracking (MPPT): Optimizes solar panel efficiency for faster charging.

• Temperature Compensation: Adjusts charging parameters based on ambient temperature, ensuring safe and efficient charging.

• Input Voltage: 11.5–23V, 25A

• Output Voltage: 14.4V/14.7V (lead-acid), 14.2V (LiFePO₄)

• Charging Current: Up to 20A

• Battery Types: WET, MF, Ca/Ca, AGM, EFB, GEL, LiFePO₄

• Battery Capacity: 40–300Ah

• Ambient Temperature Range: -20°C to +50°C (-4°F to +122°F)

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.

Shipping Charges

Free standard shipping on all orders.

Processing Time

Most items ship within 2 business days after an order is placed*. Allow additional time for shipping to your address.
*Please note: If an item you ordered becomes unavailable, you'll be notified and a full refund will be processed within 2 business days.

Shipping Area Restrictions

Shipping is not available in the following areas*:
  • British Columbia (Remote)
  • Alberta (Remote)
  • Saskatchewan (Remote)
  • Manitoba (Remote)
  • New Brunswick (Remote)
  • Nova Scotia (Remote)
  • Prince Edward Island (Remote)
  • Newfoundland and Labrador (Remote)
  • Yukon
  • Northwest Territories
  • Nunavut
*Please note: Shipping area restrictions may vary for large items. If an item can't be shipped to your address, we'll let you know during the checkout process.
See our return policy to find specific return information for this product and steps on how to return by mail.