Midsummer and the Spanish leading producer of sandwich panels Hiansa Panels have signed a Letter of Intent to offer customers within the industrial and agricultural sector in Spain a sandwich panel integrated with Midsummer SLIM solar panels, making the roof produce energy.    This is Midsummer’s third major cooperation agreement signed on the Iberian Peninsula in a short period of time.   The cooperation between Midsummer and Hiansa Panel will offer the industrial and agricultural marke...