Quote:
Originally Posted by Ritchy
mainly need the battery for starting tbh, the alt should be able to supply everything while driving, battery shouldnt be able to discharge while driving at all
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Correct but using too many accessories while driving will reduce the charge to the battery and driving short distance will not recharge it.
Especially during winter when you use window and mirror heaters along with wipers. They're all big consumers. Luckily, petrol ones use less current to start. For my derv I'd always choose strongest option possible that would fit the battery tray.