Hi I am wanting to build a couple of timed open/close doors for the chicken pens I would like to run them on solar power with a small 12v motor and battery.The motor would be high torque (10kg) 2rpm with a simple pulley and twine set up to raise an aluminium door .I will get a pulley size so it takes around 2 minutes for the door to open .The Motor is rated at 2-3 amps and I "think" I would need a battery pack of at least 200Mah for it to open and then close once.Based on this if I got a 4000Mah battery it should run at least 8 days without sun to recharge the battery does my logic sound correct? Please find links to the motor ,battery and timer ...I understand that the timer will also draw a small amount of power.................. http://www.ebay.com.au/itm/281761621916?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT ................... http://www.ebay.com.au/itm/141518885160?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT ................... http://www.ebay.com.au/itm/1x-12V-D...118696?hash=item4184c10da8:g:Fo0AAOSwiLdWAHhh Many thanks in advance for your time