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Chris Lewis

According to :
buy a large battery charger. I have one with 200 amp boost. My 200 amp
boost charger will start my van with a stone dead battery. cranking my
caravans engine at zero degrees a winch will be childs play

I seem to recall somewhere reading that 12V winches draw anywhere
from 50 to 200A. Boost chargers are rated for highly intermittent
operation, after which they have to cool down. A practically small
boost charger for 100-200A will only be able to deliver that for a
matter of seconds. For the cost of a boost charger capable of
running for longer than that, you can buy several spare car
batteries, and the batteries would weigh less.
--
Chris Lewis,

Age and Treachery will Triumph over Youth and Skill
It's not just anyone who gets a Starship Cruiser class named after them.