More important than photovoltaic for 1.-EUR Watt peakLithium batteries with extrem much load cycles in a price range around 300.-EUR per kWh capacity are more important for the price of solar electricity than photovoltaic for 1 EUR W peak.
The fans of photovoltaic do not like to hear this arguments, because it hat been always the arguments of the opponents. Base load ability, supply of power plants for the prognosis failures of wind power, this words had been for solar electric power fans a red cloth. The production of solar electricity is only the first part of the delivery. The last part is to deliver the electric power when needed.
Go to the calculator for sea water desalination. It's a practicall example where a applications needs 24 hours a day uniformly solar electric power. Enter in the left column with the lead acid batteries 0.- EUR per kWh photovoltaic. Even a donated photovoltaic is with lead acid batteries as storage around twice as expensive as photovoltaic for 3000.-EUR per kW peak in combination with the new lithium batteries.
It would be possible to run the sea water desalination with a Diesel generator. Always when the sun does not shine, the Diesel generator produces electric power. Always when the sun delivers not enough electric power, the generator complements. In this case, the generator works with partial load and needs per kWh more Diesel than under ideal full load. Without storage are in this sunny country - twice solar yield per kWh peak compared to Germany - only 20% electric power share possible, in Germany only 10% Our electric grid is very complex, but this powr system for a sea water desalination plant is a simple example, where it's possible to learn much about the problems of electric power suopply.. |
