How much tilt should photovoltaic panels have to be to be effective

To optimize performance, tilt your panels at an angle that is 10-15 degrees less than your latitude. For example, if you live at a latitude of 40 degrees, set your panels at about 25-30 degrees. [pdf]

Canada solar panels models

Canadian Solar offers several series of solar panels for residential and commercial systems, including those below:All-Black (residential)HiDM (residential)Ku (commercial)BiKu (commercial)HiKu (commercial)BiHiKu (commercial) [pdf]