Hello, just joined this forum. Getting started with PV solar, have an outbuilding that we didn't want to run 300 yards of electrical wire to plus deal with lightning issues. System consists of: 1 - 100W Renogy mono crystal panel Windy nation 30A PWM controller 37AH AGM battery Loads powerd include 3 - 15W LED light fixtures (1 on the controllers load terminals, 2 switched from the battery) Automatic chicken door 12V water pump for the chickens & dogs (not installed yet) Everything seems to work except the switching of the load is erratic, have it set to come on for 3 hours at dark. Has to be really dark to turn on, but finding the lights on in the AM, have even seen them turn on in daylight. Is the panel voltage where "dark" is declared programmable? Chickens are getting neurotic, help appreciated!