CTEK D250SE Battery to Battery Charger

NCC Trained · Victron Dealer

CTEK D250SE Battery to Battery Charger

Rayne Automotive

£234.84

Warranty 1 year

Available to order

Design your full system

183 five-star Google reviews

Delivery

Dispatched every Monday and Thursday with next-day delivery

Free UK delivery on orders over £50

  • Made in the UK · NCC & Victron trained team
  • Technical support from the people who build the systems
  • Need help? Speak with an expert

About this product

SPLIT CHARGE · DUAL INPUT (DC-DC + SOLAR)
✓ Built-in MPPT Solar✓ 20A DC-DC✓ Smart Alternator Ready✓ 8-Stage Charging
Dual-input charger combining DC-DC alternator charging and MPPT solar in one compact unit

Charges your leisure battery from the alternator whilst driving and switches seamlessly to solar power when parked. This CTEK dual-input charger features an integrated MPPT solar regulator that optimises solar power harvest without needing a separate controller. It automatically selects the best available power source to keep your batteries safely topped up at all times. If you want off-grid energy independence from a simple, all-in-one unit without building a multi-component system, this is the ideal choice.

  • Dual input — alternator + solar in one device
  • Built-in MPPT solar controller (up to 20A, max VOC 23V)
  • 20A DC-DC charging from alternator
  • Smart alternator compatible
  • 8-stage charging including maintenance mode
  • Works with AGM, gel, and lithium batteries
  • Compact — ideal where space is tight

🔧 Tech Specs

Shared
  • Model : CTEK D250SE
  • DC-DC Output : 20A from alternator
  • Solar Output : 20A MPPT (max VOC 23V, up to ~200W panel)
  • Charge Profile : 8-stage (bulk → absorption → float → maintenance)
  • Battery Compatibility : AGM, gel, lithium (configurable)
  • Smart Alternator : Yes
  • Bluetooth : No (CTEK app via optional SmartPass)
  • Solar Input : Yes — built-in MPPT, max 20A, max VOC 23V
  • Dimensions : 142 × 69 × 186mm
  • Weight : 1.1kg
  • Warranty : 5 years (CTEK)

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Questions and answers

Can Rayne Automotive help me choose the right option?

Yes. Use the System Builder for a full specification, or book a consultation and tell us what you want to run and what is already fitted.

Do you supply trade accounts?

Yes. Van converters can apply for a Rayne Automotive trade account for kit pricing and support.

Is help available after I buy?

Yes. The Help Centre carries installation instructions, and the team supports what it sells.

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Building the complete electrical system?

Plan the charging, storage and distribution together with the System Builder, browse the example complete systems, or book a consultation and tell us what you want to run and what is already fitted.

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