1.5kWh of energy, not power.
And it’s not lifting 500 tons. Each bucket weighs 500 tons (regardless of boat or no boat, due to displacement physics), it is in almost perfect balance. The motor simply has to rotate the mechanism against frictional losses.
I’m only an amateur but I’m happy to give it a go
It takes me about a week of holiday before I can read. No work stress, and less obsession with the continual dopamine hits of smart phones, eventually lets my brain relax enough to pick up a book.
Every time I come back from holidays I tell myself I should keep reading. I never have kept it up though…
Battery lifetimes are specced as 80% capacity remaining. So a 300 mile range becomes 240 miles. Still highly usable.