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Q: Can I attach the product to the roof using screws and making small holes at the edges? Because I do not want to use the Powerbond. It is not MC4 is?

I got one of these panels about 18 months ago and the adhesive is serious, which is good for me onto of my RV. Once you put it down it is DOWN for good. I think you could use screws outside the panel and secure the panel with small very sturdy bars or plastic or thin metal and run those bars over the edge of the panel thus not penetrating the panel itself. You could do this perpendicular to the length of the panel at several spaced locations and lose only a negligible amount of panel surface area being in the sun. With my next panel this is what I intend on doing. This panel is great and I run it through a MPPT controller than converts it back to 12vt to charge my battery bank. I do not own this company or have any interest in it but think a good product is a good product. It works for me and this one, being advertised, has the solar connectors on it already, the first one I bought did not, just 2 wires positive and negative. This is also about 50 dollars less than the first one I bought. I want to repeat, the adhesive is aggressive and will stick to what you put it on. Do not expect to move it once it's installed with the adhesive surface under the plastic peel off. Good Luck.

Q: Are wire connectors included for panels currently being sold and if so, what type are they? mc3 or mc4

The panel I was shipped had one male and one female MC3 connectors installed at the terminals. They are non-locking (not MC4). Lead length is about 18 inches.

Q: Can this be used to charge an electric car?

If one of these produced 1 kWh per day on an electric car, and you didn't use your car much (like me), you could in 5 days recharge a Prius or Crosstrek which has a 7.9kWh battery and depletes to about 3 kWh before shutting off the electric mode.