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      09-20-2020, 01:35 PM   #1
Lucky1
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Drives: '08 128i Coupe SGM 6MT
Join Date: Nov 2008
Location: Toronto

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CTEK MUS 4.3 POLAR trickle charger safe for indoor garage use?

Hi, I have a CTEK MUS 4.3 POLAR charger which I use on my 2015 Porsche 911 Carrera 4S.

Someone told me it is not safe to use this trickle charger indoors (in my garage) on my car for long term winter storage and that it is safe for outdoor use only. Said this is due to the amperage being high (4.3 vs 3.3 on my other CTEK). I always leave it on snowflake winter trickle mode.

Anybody know whether this is true or not and the safe way to operate it for long term winter storage? I did e-mail CTEK for comment.
Appreciate 1