Another smile...the ability of choice. It wasn't that long ago that BW Magnatek dominated the market and the converter meant a buzzing 30 amp potential to power lights while a massive wire wound bleed resistor allowed a whopping 5 amps to recharge a house battery all the way to 15+ volts. The vehicle alternator offered a staggering 60 amps recharge potential, 1156 bulbs sucked 3 amps and melted interior lamp covers, sinks had hand pumps and RV owners were utterly convinced they were rolling in clover. Even going for ice every 3rd day to jam into a tiny ice box did not dampen spirits. Campers gathered roung campfires to hear bragging about "new fully automatic electronic battery isolators". Wire the 3 studs and no more switches.
Be Grateful Is All I Can Urge :)