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Electric Boat Costs 40–50€ to Cross Baltic Sea, vs 750€ Refueling Gas Boat
(cleantechnica.com)
This is a most excellent place for technology news and articles.
I've dealt with storing energy from solar for a long time now, and from the deepest part of my heart: fuck lead acid batteries. The only thing they have going for them is being able to charge below freezing. But they're shit in every other way, especially weight.
They have one other advantage: unit price. But Lithium is rapidly catching up, and is already better if you calculate price per lifetime charge cycle.
Recyclability, too