NewEnergyNews More: SOLAR TURNS IN A NEW DIRECTION

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  • Wednesday, October 15, 2014

    SOLAR TURNS IN A NEW DIRECTION

    How Grid Efficiency Went South

    Matthew L. Wald, Oct. 7, 2014 (NY Times)

    “Almost every rooftop solar panel in the United States faces south, the direction that will catch the maximum energy when the sun rises in the southeast and sets in the southwest. This was probably a mistake…The panels are pointed that way because under the rules that govern the electric grid, panel owners are paid by the amount of energy they make. But they are not making the most energy at the hours when it is most needed…[T]he rules add cost and reduce environmental effectiveness, critics say, because they are out of step with what the power grid actually needs from intermittent renewables like wind and sun, and from zero-carbon nuclear power…[S]olar and wind will produce a lot of energy, but the power they make often does not match the system’s demand, so the contribution to its power needs may be much smaller…

    “[Coal, natural gas and especially nuclear plants] earn their keep by selling energy around the clock. Put enough wind and solar units on the grid during the hours when they are running and they flood the market and push down the hourly auction price of a megawatt-hour of energy…The problem is especially acute for nuclear reactors because their costs for fuel are roughly the same whether they are running or not…[S]ome have already closed and more are threatened…Even relatively clean natural gas plants are hurt; they are generally on the margin, the first to shut when new solar comes on line…” click here for more

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