"Dave" wrote in message
...


I am going to take one of our two cars off the road at the end of this
month. I had thought of running a mains extension under the bonnet and
leaving a charger there. The extension will be plugged into a timer to
control how long the chargers is on.

How long a time should I power up the charger, per day/week?

Dave


I have a boat - that is not used over winter - I have a modern 12V pulse
charger .. I just put it on an overnight charge once a month.
It initially take a couple of amps, but drops very quickly to trickle
charge.

Boat starts no problem come spring.

Far better to keep battery in good nick ... don't keep it permananently
trickle charging, and avoid large current charging form flat, as that can
damage the plates.