Mohammed Hassuna says he was recently arrested by the Israeli Navy while fishing within the legal zone, and forced to strip down and swim to the gunboat.
On Monday, ZenithSolar unveiled a new solar dish that could make the cost of solar energy competitive with fossil fuels.
Two key issues are Israel's demand to stop arms smuggling and the Palestinian desire for an end to the economic blockade of Gaza.
Israel seeks US help on Gaza weapons smuggling, while Arab nations remain divided over a truce.
Only three civilian fatalities to date, but a climate of fear pervades Israel's southern communities.
Both sides are maneuvering for another ceasefire, and Israeli troops are not likely to invade the Gaza strip, say analysts.