In article , says...

Simplest fix's.
The simplest fix would be to have the engine restart when the battery drops
to 12.2v, run for a while then go back into standby.
Alternate would maybe be a PIC that monitors voltage, if sees 12.2v for x
period time (overcome spikes etc) start the engine for y period of time,
providing that the controller is switched on etc.

If your controller has a "sleep" option, then it should have a "cycle"
option, which would let you run it every day, if necessary. All our
tower backup systems are set to automatically cycle every week - not
to keep the battery charged, but to maintain quick start-up times.


Does anyone know of a stand alone voltage/current data logger kit that could
log the battery for a few weeks (UK).

Lots of them. Google is your friend.


John.

Terminal voltage is not a good battery condition indicator (in your case).
Depends too much on last charge state and idle time, although with
a .5A constant load, the surface charge should go away fairly quickly.
Sounds like the best suggestion so far is an isolated starter battery,
with or without a solar panel. Is the remote wired or wireless?
Either way, it should be relatively painless to run a trickle charge
line to the battery.
100 AH equates to 200 hours at .5A -- but, and this is a big but,
the AH rating is for 8, 10, or 20 hour discharge (standard) to a
specific terminal voltage (depends on battery type/vendor/method).
As someone has previously pointed out, DOD has a major impact on
battery life, and also determines the type of charge routine needed.



"Lane Lewis" wrote in message
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"John" wrote in message
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