SEDER BOQER, Israel — Renewable energy is often intermittent and unreliable, but with the right storage technology, it can become a substitute for baseline power.
A paper that will soon come out from the National Solar Energy Center in Israel hypothesizes that the country — which now only gets a tiny fraction of its power from solar — could conceivably boost the total to 90 percent with things like vanadium-redox flow batteries and pumped hydro storage, according to David Faiman, the director of the center and chair of the department of solar energy and environmental physics at Ben-Gurion University here.
The paper is based on an hour-by-hour analysis of the country’s electricity consumption in 2006. Faiman’s group studied the baseline power, intermediate baseline and spinning reserves. Solar plants, without storage, could only generate around 3 percent to 4 percent of the country’s power without being forced to dump large amounts of solar power.
If one were willing to dump up to 20 percent of the solar power generated because of transmission and distribution levels, the total could rise to 20 percent, he said. The 20 percent figure matches the estimates of other researchers in other parts of the world on how much renewables could become part of the energy mix.
But add storage to allow a utility to deliver in the evening the solar power that was generated during the morning and afternoon, and — through the magic of storage — the figure zooms dramatically. The country gets an inordinate amount of sun, and areas like the Negev Desert in the south still sport quite a bit of open space. Plus, some of the intellectual property for concentrating photovoltaic, or PV, comes from the region.