FAQEverything you need to know about solar systems – from how they work to funding options.Frequently asked questions about photovoltaic systemsHow does a photovoltaic system work?How much does a photovoltaic system cost?Is it worth investing in a photovoltaic system?How long does a photovoltaic system last?What is the difference between monocrystalline and polycrystalline solar modules?Do I need a power storage unit for my photovoltaic system?What is a feed-in tariff and how does it work?Do I need to obtain a permit to install a photovoltaic system?How can I maintain my photovoltaic system?What happens when the sun isn't shining or it's cloudy?