Just bought four more of these to cover the complete SW side of my shed roof. I'm typically getting 360 watts from the four current ones. So this will get the system to just above 700W. I'll play around with mounting the used 220W panels to the patio cover, but it only get sun after about noon, due to the neighbor's tree blocking it, and is almost horizontal... so this is a bad time of the year for it's angle if I don't add a tilting stand of some sort.
My main concern is that these HF panels will not hold up to long-term sun exposure. Oh well, guess I'll find that out in a year or two.