KETURA, Israel — Arriving at this bone-dry kibbutz in the Arava Desert late one afternoon in August 2006, Yosef Abramowitz, a social activist, Jewish educator and multimedia entrepreneur from Boston, opened the door of his van and was hit by a wall of heat.

“The sun was setting, but it was still burning,” he said. “I remember the sensation.”

Later, unable to sleep, he rose about 5 a.m. and stepped outside as the sun was coming up over the mountains of Jordan. “It was so hot already,” he recalled. “I said to myself, ‘This whole place must work on solar power.’ ”

Then he found out that was not true.

So Mr. Abramowitz, who had spent six months at Ketura in the early 1980s as part of a Young Judaea program, quickly abandoned his plans to spend a quiet family sabbatical with his wife and children in southern Israel. Instead, he went into partnership with Ed Hofland, a businessman from the kibbutz, and David Rosenblatt, an investor and strategist from New Jersey, to found the Arava Power Company, now the leading commercial developer of solar power in Israel.

After more than five years of political and regulatory battles with the Israeli authorities, the company has transformed 20 acres of a sand-colored field on the edge of the communal farm. It now glistens with neat rows of photovoltaic panels from China — 18,600 in all — that harness the sun. There is no smoke, only a slight buzz in the spotless rooms where the panels’ current is turned into electricity that can be fed into the electrical grid. Small openings in the perimeter fence allow animals to cross the field.