Luxury electric boatbuilder ALVA Yachts is back with its latest solar electric catamaran. The upcoming OCEAN ECO 78 will arrive as a mid-size marine vessel in ALVA’s current lineup and comes equipped with the solar and electric propulsion technology to reach a top speed of 14-15 knots (16-17 mph) at sea, plus plenty of battery capacity to go far – all backed by solar panels on its roof.. More…