The rule of thumb doesn't say that driving wind power beyond 34
percent of grid electricity is impossible, only that it becomes «increasingly difficult,» i.e., increasingly expensive.
This particularly applies to Australia, where by far the greatest
part of the grid electricity is generated by coal - fired power stations, but it also applies to many other countries.
Because despite adding considerable electricity generation capacity in the last decade, India's energy supply is still not meeting its huge growing demand, and a lack of supply and infrastructure issues means the
price of grid electricity is rapidly rising.
First in the U.S., Hawaii residents and businesses can install solar power — without incentives — for less than the cost
of grid electricity.