It seems to me the argument of insufficient land is a real non-starter. Israel has a fair amount of unusable (for other purposes) desert land where there is a great deal of wasted sunshine. Besides, from a strategic viewpoint, lessening Israel's dependence on imported fuel would be a major plus.
Trump: Middle East would be more stable if Saddam, Gaddafi still in power (Reuters)
from the article: UN: As world leader in solar energy, Israel must cut fossil fuel use