Here’s a couple of examples from the ‘general questions’ category:
Good question! This sort of tariff was first introduced in Germany in the 1990s and it applied only to power which was “fed in” to the electricity grid, hence the name. The tariffs in the UK apply to all the electricity the system produces, whether it is used on site or fed back in to the grid, so the name is actually a misnomer (they are really ‘production tariffs’).
It is power produced from a sustainable source such as solar, wind, or biomass. Electricity from fossil fuels like coal, oil and gas or from nuclear stations is not renewable.