The book I read to research this post was photo voltaic design & installation for dummies by Ryan Mayfield which is an excellent book which I bought from kindle. PV stands for photo voltaic & is a fancy name for solar panels. These are panels that convert the suns rays into electricity. To start with you need to plan the installation you will need a small camera to photograph the site & a pyronometer to measure the strength of the sun. Then you need to measure the area where the panels are going & multiply it by the suns strength & multiply that by the average hours of sunshine.
When you fit the panels bear in mind that while there is daylight there is an electric current flowing. If you are connecting directly to the mains you will need an inverter to step up the voltage. You will need a charge limiter if you connect to batteries because a spike can damage them. The batteries need to be deep discharge because you will discharge & recharge them completely. The cheapest batteries are lead acid but nickel cadmium are better. If you do the job yourself you have to get the wiring certified.
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