CTEK D250S DUAL image 1
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The CTEK D250S is a Premium Battery Isolator, a Smart Power Relay, Solar Panel Voltage Controller with MPPT solar power management functionality and a temperature compensated 20A smart battery charger all combined into one multi-functional product!

The D250S DUAL on-board charger, charges while you drive; it gathers energy from multiple DC power sources (the alternator(s), solar panels and/or wind power generators) and optimizes power to properly charge your service battery bank with microprocessor controlled smart charging algorithms and provides temperature controlled charging to meet the charge requirements of your service battery bank in any weather. It increases simplicity and reliability by eliminating the clutter of many individual components including battery switches, secondary battery isolators, relays, load managers, low voltage alarms and cutoff’s, separate solar panel and wind generator voltage controllers, etc.

The CTEK D250S Dual on-board charging system optimizes the charge generated during driving in order to provide you with more battery power and capacity when you need it.

  • High Efficiency Power Management
  • Suitable for all 12V lead acid batteries
  • Simple to install and use – Fully Automatic
  • Multi-step charging from alternators and other DC sources such as solar panels
  • Automatic starter/service battery separation.
  • Solar panel voltage regulator with Maximum PowerPoint Tracking (MPPT), synchronizes with other power sources such as alternator and/or wind generator
  • Maintenance charge of starter battery via solar panel
  • High vibration resistant design
For more information on this product you may visit the CTEK website.


Part Number



Universal CTEK D250S DUAL
Universal (May not fit all vehicles or require modification)

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