photovoltaic performance in heavy japanese snow

well, we toured a city facility with 50kW of solar pv in ninohe, japan on a day with 100% cloud cover and 1" snow accumulation per hour.  needless to say, we experienced the painful example of the intermittence in generation that photovoltaics are subject to.  fortunately, on such days the tendency of wind is in greater likelihood and, therefore, can serve as a secondary generation source.

there are a number of large wind generators in iwate prefecture that provide self-sufficiency for their demand area and surplus consumption.  this surplus is sold back to conventional energy producers via the grid and is mandated by the japanese government to be paid to the renewable energy generator at 2x the going kilowatt hour rate.  in this case, a typical japanese kwh goes for roughly .20cents.  surplus renewable energy (re) generation is purchased by a utility company from the re owner at .40cents per kwh.  not bad, eh?  it incentivizes larger systems beyond self-sufficiency for a homeowner or business to install--helping to leverage a fledgling renewable energy tidal wave to the conventional power generation on the grid.  we'll see what happens...