I have the 320 watt solar with Zamp controller and at home park the unit outside in reliable sun. So what to do? Plug it in to 110 power for a Colorado winter, or allow the unaided sun to do its daily work? I have the AGM 6 volt batteries. Last year I winterized and plugged it in. As far as I can tell, no damage done. But, the sun brings the voltage up to 13 plus volts each day. Any wisdom out there? (Or does it fundamentally matter?) Solar and batteries remain a marvelous mystery to me.
Thanks in advance.
Stan from Boulder, CO. Hull #204