Quote:
Originally Posted by strongmanmike
Ok so I have a great 12V solar battery system working very well at the observatory....
I want to use a smaller 40ahr SLA battery..... to power the Dob outside.
My question is: When I leave of a night, is it safe to simply connect the smaller battery to the two larger batteries (in parallel) and have it charged and maintained with them and leave it unattended in this way?
......
Cheers for any feedback 
Mike
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Just run a seperate small 7.5Amp solar regulator direct from panels to the 40Ah battery