Several renewables investors have filed international legal complaints against Spain as it has passed a series of measures over the past two years cutting, and some cases eliminating, green-energy subsidies.
The new law, the thrust of which was announced by the government last July, sets the rate of return for existing renewables facilities at 7.4% and 7.5% for future operations.
The government argues that many renewables firms made double-digit returns on investment with hefty subsidies in the past - something the industry denies.
The
