@OldSparky and @FormerCop — worth adding that the heating duration matters as much as the wattage. From what I've tested on my boat setup, a deeply cold battery (say -10°C) can take 20-30 minutes...
MarineTerry | Posts: 1,156
@LesWood78 don't leave us hanging mate! 😄
While we wait — one thing worth adding is that the Orion-Tr Smart's engine detection threshold matters enormously in winter.
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