Wednesday, July 22, 2015
Will Low PV Prices Kill Small Wind?
With solar photovoltaic (PV) panel prices going lower and lower, solar arrays are quickly taking the place of small wind power projects and residential turbines. Is this the beginning of the end for small wind?
For many years, renewable energy enthusiasts in the northern areas of the United States favored small wind turbines, or a combination of wind and solar PV to produce electricity. Until recently, the installed cost of small wind turbines (100kW or under) was cheaper than that of PV However, the small turbine business has been plagued with problems since its inception. Many small turbines have been overhyped and under-performing. New machines have hit the market only to disappear at an alarming rate, leaving heart-broken consumers and red-faced dealers.
In a decade that has seen very few technical advancements in small wind systems, PV has shown huge advancements in technology, like micro-inverters, power-point tracking and increased efficiency. At the same time, Chinese PV manufacturers have driven solar panel prices down from $4 per watt in 2005 to less than $1 in 2015- in some cases under 50 cents (under 3 dollars per watt with all installation costs added.) Small wind turbine prices vary widely, with installed costs from $3- $6 per watt. Solar has the inherent advantage of being a solid-state technology, unlike wind turbines, which have a lot of moving mechanical parts. When parts move, they break, and all but a few wind turbines on the market have pretty dismal maintenance records, compared to PV.