Hi ESokoloff!
yes - its a good idea to mount the device on te bike. Why not.
a protection again environmental influences is necessary then.
it consumes about one - well known - pint of volume
und would fit into the size of the housing you decribed -
when it comes without power adaptor for heating.
your needs are different to mine.
charge twice a day about the same time.
now that i've cracked the code 'everything' is possible.
its just a question of indiviual programming.
the gadget may charge the bike at two different times a day to a given level.
just when you plug it in- with no hands on.
i dont know where you live. Is heating an issue?
or do you live in one of those warm & cosy sunshine states?
Not so in Austria
Bernardo