Originally Posted by Adam Stander
While your design may appear a bit strange at first glance I actually think it has some merit.
I like the idea of separating non essential loads from the starter battery as you have done. Obviously this assumes that the one service battery is in the engine compartment.
BUT, if it is, you have another problem. The Ctek is doing just about nothing where it is, most definitely not doing what it is designed to do. The Ctek needs to be placed at the back of the car as close as possible to the rear service battery.
However this complicates the design enormously. If you move the Ctek to the back, how do you charge the service battery in the engine bay?
You essentially have three choices with the service battery in the engine compartment.
1/. Just parallel wire it to the starter battery. (Not ideal).
2/. Control the battery via a switch or ignition activated relay/solenoid or NL intelligent solenoid. (best bang for buck safe solution)
3/. Put in a second CTEK 250 to charge it. (huge unnecessary overkill)
These ramblings are intended to give the rear service battery the best chance of doing its job properly, as that battery is doing duty as a life support system (cold beers)
ZS5KAD Yeasu Ft-897D
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