How much space does MOTOMA's 5KW system need for solar panels?

At least 10 square meters are required.

Can the solar panels fit on the roof?

Yes, and it needs customization.

What about daily maintenance of the solar panels?

Pay attention to surface cleaning, and do not accumulate too much dust or snow which will block the solar panels.

Can solar panels be used on cloudy days?

That depends on the light intensity. If the light is strong, there will be a weak current and voltage, but this is still very different from the bright light on a sunny day. The stronger the light, the better the power generation effect.

What is the difference between series connection and parallel connection for solar panels?

For solar panels, the series connection increases the voltage, and the parallel connection increases the capacity.