There are two scenarios here – something is broken or wired incorrectly, or the system is assembled correctly and under-performing compared to customer expectations.  Genasun performs 100% testing and inspection on the controllers prior to shipping.   Your controller worked when we shipped it.  Unless the box got run over by the UPS truck, hit by lightning, or was recovered from the bottom of the ocean, it will work correctly when installed.  Please read the manual to ensure it was installed correctly.Here are the most common causes of system output not meeting expectations:Panels are rated  at “Standard Test Conditions” which should be viewed as a best case scenario.  For example, a 20W panel will produce 20W under bright light, on the equator, pointed directly at the sun in cold weather.  If you’re not on the equator with temperatures of 5°C, if the atmosphere isn’t crystal clear, if your panel isn’t pointed perpendicularly to the sun at all points in the day, it will not produce the “rated” power.Power from the panel changes over the course of the day.  The panel output is a direct function of how much light is available.  The maximum output will be during the middle of the day.  The further you get from the equator, the smaller that window for maximum light output.