If there is a solar power question not answered, let us know and we add it to our list.
The most common panels are approximately 1m wide by 1.65m long with an output of 250w. How much space you need really depends on the size of the system you need.
Solar panels do not produce power at night as they require energy from the sun. However, you can use a battery storage solution!
As long as it is maintained annually and you have good quality products the system should last between 15 and 30 years.
Panels should be cleaned frequently with a hose and using no chemicals. The cleaner your panels the more power will be generated and cleaning should be part of the annual maintenance program.
No, if the power is out the grid is down and this will turn your solar system off. This is because the people working on the lines don’t want your solar system pumping power out while they are working. However you can have a battery backup system to keep power on while the grid is out.