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Shelton, CT
reply to KoolMoe

Re: rig motion detect w. solar

If it was made for regular batteries it may not like rechargeable batteries. They provide ~1.2V vs the typical 1.5V for "regular" batteries.
Try with fully charged NiMH and see if it works for few days. If it does then you might have a chance of using one panel per device.
If you want to share the charging circuit you must be positively sure that there is no galvanic connection between the batteries and the AC side - in other words that the switching is done via a relay rated at least 500V between contacts and coil (or an optocoupler). Otherwise the insulation may break down if the lights are on different legs of the AC.

If you can confirm that, the wire gauge is insignificant. The current delivered by a smallish panel is very small to start with, and you will further limit it with resistors so that you don't overcharge the batteries. Hell you can even use telephone wire...
In all honesty it's not worth it, just get a normal detector...