[apgrok1]

Ok how about this one. Split the battery power so that some essential components (starter, ecm, radiator fan) run off the main battery, but everything else (lights, radio, wipers, blower fan) runs off a separate deep cycle battery in the trunk. This would save the power needed to be generated by the alternator to run these things. You would, of course, need to charge the second battery manually, but you could use solar. You could also incorperate the electric power steering on the second battery.