1. 1 CTEK D250S DUAL CTEK SmartPass A revolutionary solution for 12V Dual Battery systems

2. 2 It all started simple…. One Alternator One Battery One Starter Motor

3. 3 Then came a fridge, lights, navigation and…. and suddenly the battery was dead.

4. 4 Well, let’s add another battery for all consumers …and a Black Box to separate the two battery banks Diodes VSR MOSFET Relay

5. 5 … and some more stuff …and a Black Box to separate the two battery banks Diodes VSR MOSFET Relay 3-step alternator Battery watch 110/230V charger with multiple outputs Solar panel with dedicated regulator Thick wires Battery Switch 0 – I – II - Both

6. 6 … and some more stuff …and a Black Box to separate the two battery banks Diodes VSR MOSFET Relay 3-step alternator Battery watch 110/230V charger with multiple outputs Solar panel with dedicated regulator Thick wires Battery Switch 0 – I – II - Both

7. 7 …and a Black Box to separate the two battery banks Diodes VSR MOSFET Relay 3-step alternator Battery watch 110/230V charger with multiple outputs Solar panel with dedicated regulator Thick wires Battery Switch 0 – I – II - Both But problems remained with: Very long recharge time from alternator Engine idling just for battery charging Batteries rarely fully charged, which reduced the useful time Regular battery replacement Solar panels conflicting with other sources, which reduced output No charge of starter battery from solar Overheated service batteries Costly, difficult to trouble-shoot, expand, modify, … …

8. 8 Let’s start with the basics again One alternator..add another battery bank Connect the alternator directly to the Starter … and a CTEK D250S DUAL that separates the two battery banks

9. 9 Engine off The Starter battery is prepared for engine start …and the Service batteries serve consumers

10. 10 Engine running CTEK D250S DUAL charges the Service batteries with a temperature compensated charging. High temp => lower voltage Low temp => higher voltage

11. 11 Attach a solar panel directly Synchronized with the alternator when the engine is running

12. 12 The panel serves both batteries when the engine is off Pulse maintenance of Starter battery …and charging of Service battery with built-in Maximum Power Point Tracker (MPPT) Maximum Power Point

13. 13 LIMITATIONS: 20A max from D250S DUAL Charge current shared with consumers, which prolongs charge time

14. 14 Charge Current D250S DUAL limitations Max 20A D250S DUAL charges with 20A until the battery reaches max voltage. The current then tapers off to a fully charged battery

15. 15 D250S DUAL limitations Max 20A Charge Current Directly from alternator: High current initially (up to 30 minutes) Current tapers off to very low level – 100% charge from alternator almost impossible

16. 16 D250S DUAL limitations Max 20A Charge Current Direct charging from alternator could be faster during a short time for: Large alternator Large Service Battery bank Deep discharged batteries D250S DUAL is faster in the long run, but could be behind during the first minutes. 20Amps

17. 17 Charge Current D250S DUAL limitations Charge current shared with consumers …prolongs charge time Current used for consumers…

18. 18 SOLUTION – and more! CTEK SmartPass High charge currents through SmartPass

19. 19 SOLUTION – and more! CTEK SmartPass Low charge current through D250S DUAL.

20. 20 SOLUTION – and more! CTEK SmartPass Green curve => minimized charge time

21. 21 SOLUTION – and more! CTEK SmartPass Charge Consume Move non-critical consumers. SmartPass provide current direct from Alternator. Almost all current through D250S DUAL is used for charging. Critical consumers directly from battery

22. 22 SOLUTION – and more! Built-in Battery Watch Consume Engine off. Current from the Service Battery

23. 23 SOLUTION – and more! Built-in Battery Watch Engine off. Service battery deep discharged. Disconnect non-critical items. Service battery and critical items are protected.

24. 24 SOLUTION – and more! Solar Panel serves all batteries! Charge Solar panel charges Service battery and maintains Starter battery Maintain

25. 25 SOLUTION – and more! Overheat protection of Service battery Charge Service battery overheated due to age, oversized alternator, high ambient temperature. 60°

26. 26 SOLUTION – and more! Overheat protection of Service battery Charge SmartPass disconnects direct path from alternator. D250S Dual finalize charge with reduced voltage and current 55°

27. 27 SOLUTION – and more! 110/230V charger serve both battery banks with one output Charge AC/DC charger charges both Service and Starter battery Charge

28. 28 CTEK D250S DUAL & SmartPass The Dynamic Duo A B C D E Five connection points for a DC system at a completely new level of standard!

29. 29 USE DIRECT USE LATER Basic Electricity Onboard PRODUCERS CONSUMERS STORE

30. 30 Smartpass - The DC Manager CONSUMERS PRODUCERS USE DIRECT USE LATER STORE