How trickle charge 12v when laying up Insight
I need to put my 2019 Insight in storage for 6 months. Much to my surprise per my dealer the only way to keep the starter battery charged is to buy an extender for the 12v battery +post (to avoid the clips causing a short) and charge the battery in the cabin with a window open (to let the electric cord in and any fumes out). I have laid up cars may times and needing to leave the car open was a complete surprise- normally one charges the battery under the hood. I expected to charge it via the jump-start connection under the hood, but Honda says not to do so.
Does anyone know a way to keep the starting battery up while the car in is storage without leaving a window open? Mice and dust are not friends.