Skip to content
20+ Years of Alcon Experience. FREE SHIPPING on all Brake Kits (USA) - Open M-F 8-5
20+ Years of Alcon Experience. FREE SHIPPING on all Brake Kits (USA) - Open M-F 8-5

CTEK D250SE Dual Battery Charger – 11.5–23V – Off-Grid Power Charger

by CTEK
SKU CTEK40-315
Save 5% Save 5%
Original price $599.99 USD
Original price $599.99 USD - Original price $599.99 USD
Original price $599.99 USD
Current price $569.99 USD
$569.99 USD - $569.99 USD
Current price $569.99 USD
Ask a question

PRODUCT INFORMATION

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.

Key Features

  • 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.

  • Battery Separation: Replaces diodes and VSR relays for improved performance.

  • Splash and Dust Proof (IP65): Suitable for outdoor and harsh environments.

  • Compatibility with SMARTPASS 120/120S: For an ultimate 140A power management solution.

  • 2-Year Warranty: Ensures long-term reliability and peace of mind.

Specifications

  • 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)

  • Enclosure Class: IP65 (splash and dust proof)

  • Dimensions: 192 x 110 x 65 mm

  • Weight: 0.7 kg

  • Ripple: Less than 4%

  • Back Current Drain: Less than 1Ah/month

  • Warranty: 2 years

Applications

  • Dual-battery systems in vehicles, RVs, and boats

  • Off-grid solar setups

  • Overlanding and expedition vehicles

  • Marine and recreational vehicles

  • Fleet maintenance and management

Why Choose the CTEK D250SE?

The CTEK D250SE stands out with its dual input charging capability, allowing for simultaneous charging from both the alternator and solar panels. Its 20A fully automatic charging ensures that your service battery remains charged, even in remote locations without access to mains power. The selectable charging modes cater to various battery types, while the MPPT technology optimizes solar charging efficiency. With its robust design and advanced features, the D250SE is a reliable choice for maintaining battery health in demanding environments.


Product Info Sheet

Free Shipping

Free on all brake kits to the continental USA

Official Alcon Distributor

Expert Advice, Products, Support

Text or Call

+1 (630) 360-2548

Chat With Us

Click "Assistance" below during business hours.

Frequently asked questions on Alcon Brakes

Why buy from Alconkits.com?

Can I buy Alcon Brakes and parts somewhere else?

Yes, some general automotive retailers and online marketplaces may list Alcon brake kits or individual components. However, Alcon brake systems are engineered, vehicle-specific systems, not commodity parts.

When purchased from Alconkits.com, you are buying directly from a specialist Alcon distributor with deep application knowledge, fitment validation experience, and long-term service support. This ensures you receive the correct configuration, pad compound guidance, wheel-clearance assistance, and ongoing support throughout the life of the brakes.

Why should I buy this kit from Alconkits.com instead of a retailer like eBay or Amazon, or marketplace?

Alconkits.com specializes exclusively in Alcon brake systems. We are not a general parts reseller.

When you buy from Alconkits.com, you get:

  • Application-specific guidance for heavy trucks like the Ram TRX
  • Fitment advice on your brakes to ensure they clear your wheels with guaranteed compatibility with your vehicle.
  • Wheel-fitment and clearance validation support
  • Pad compound recommendations based on real-world use (street, off-road, towing, track)
  • Access to replacement pads, rotors, seals, and service parts long after purchase
  • Lifetime technical support from Alcon brake specialists

Most marketplaces can sell a box. We support the entire brake system lifecycle for as long as you own it.

What makes Alcon big brake kits different from other aftermarket brake options?

Alcon brake kits are engineered systems, not assembled collections of parts.

Each kit is designed with:

  • Vehicle-specific caliper piston sizing
  • High-mass rotors for thermal capacity on heavy vehicles
  • Motorsport-grade materials and manufacturing processes
  • Compatibility with factory ABS, traction control, and master cylinder

This results in more consistent pedal feel, better heat management, and superior durability compared to budget or generic big brake kits.

Are Alcon brake parts “one-size-fits-all”?

No. Alcon brake kits are application-specific.

Vehicle weight, intended use, rotor size, caliper configuration, and pad compound all matter—especially on high-performance cars and trucks. Selecting the wrong configuration or pad compound can reduce braking performance, increase noise, or accelerate wear.

This is why buying from the specialist distributor, Alconkits.com, matters.

What type of driver is CTEK D250SE Dual Battery Charger – 11.5–23V – Off-Grid Power Charger for?

Manufactured by CTEK, we recommend this as being suitable for the following driving styles:

  • Street
  • Sporting
  • Street/Track
  • Track/Race

After purchase support questions.

What happens if I need pads, rotors, or service parts in the future?

This is THE question to ask. Alcon brake systems are fully serviceable.

When you purchase from Alconkits.com, you have long-term access to:

  • Replacement brake pads
  • Replacement rotors
  • Seal kits and service components
  • Technical guidance for maintenance and service intervals

This is a major advantage over marketplace sellers who may not support the product after the sale. We know what fits, we stock it, and we don't sell you parts you don't need.

Why does this Alcon brake kit cost more than stock brakes or some aftermarket options?

Alcon brake kits are built to deliver higher performance, durability, and consistency than OEM or budget aftermarket brakes.

The cost reflects:

  • Larger, higher-mass rotors for heat control
  • Precision-machined multi-piston calipers
  • Motorsport-grade materials and testing
  • Long-term serviceability and support

This is not a cosmetic upgrade—it is a functional braking system designed for demanding use.

Is Alconkits.com an authorized Alcon distributor?

Yes. Alconkits.com is an authorized and specialist Alcon distributor with one of the largest Alcon-focused catalogs and knowledge bases available.

Our team has extensive experience supporting Alcon brake systems across trucks, SUVs, performance cars, and specialized applications.

What kind of support is available if I have questions before or after purchase?

Alconkits.com provides lifetime technical support for Alcon brake systems purchased through us.

Our support resources include:

  • Direct access to Alcon brake experts
  • Extensive technical articles and guides
  • Fitment and configuration assistance
  • Long-term ownership and service support

Brakes are a critical system—our goal is to make sure you get it right.

How do I get support for Alcon Brakes

We make it easy - connect with us the way its convenient for you.

  • Call or Text Msg us at 630-360-2548
  • Use the Chat feature on this page.
  • Email us at sales@alconkits.com

TAGS

  • Chargers
  • ctek
  • battery
  • charger
  • d250se
  • 11
  • 23v
Find your ✔Guaranteed Fit