En el artículo o.uk,
Dave Liquorice escribió:

I have got a small PV panel that I had used with it before but wasn't
convinced that the dark/low light leakage drained more from the
battery than was put in by the PV.

A diode in the leads from the PV panel to prevent reverse current flow?

The PV panel was in a north facing
window so not ideal. To get south facing wuld require a rather long
cable run, proably not far short of 50m by the time you've gone round
things.

Think you're on a loser with that one.

How about putting a smart charger on a timer, so that it runs for only a
couple hours a day and doesn't dry the battery out by running all the
time?

Re. preventing the battery from freezing, maybe put it in one of those
polystyrene cool boxes, cut notch(es) in the lid for the cables? This
sort of thing:

http://www.automa.co.za/sites/defaul...ublic/field/im
age/AUT1175_2.jpg

--
(\_/)
(='.'=)
(")_(")