RJ - I thought I could add too haha... Unfortunately they measure their solar panels at the SUN output. Like probably at the 18VDC level... if this is 18VDC panel and produces around 6.6AMPS then it would be called a 120WATT PANEL.
By the time the solar controllers get the 18V down to what we can use which is 12VDC then you have something alot less than 120WATTs of usable power. More like 12.3VDC at 6AMPs is only 74WATTS... So where did the 46WATTS sneak off too...
At least that is what I understand about how it works...
Roy Ken