It's quite a hot topic on several forums I visit - not just here. You should see how the Caravan crowd carry on...

There are DCDC vendors on some of these sites that spruke their stuff. Still have yet to hear any compelling evidence to suggest a DCDC device can do what is required in my vehciles better than the alternator can do apart from lightening my pocket by many hundreds of dollars.
If your system works for you - great, and that is the main thing. Tim is just explaining the technical side of it to try and dispell a few myths that seem to be perpetuated on this subject. He isn't trying to tell you your systems won't work, they will - no dramas there.
To each their own.
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