Solar boat: In 2025, a Finnish builder spent about $20,700 and 200 days making a 36-foot plywood solar boat. Earlier in 2026, it crossed more than 3,000 nautical miles from the Baltic to Spain on sunlight alone - The Economic Times Solar boat: In 2025, a Finnish builder spent about $20,700 and 200 days making a 36-foot plywood solar boat. Earlier in 2026, it crossed more than 3,000 nautical miles from the Baltic to Spain on sunlight alone - The Economic Times https://share.google/s8OhHlvHO604vlYth