this post was submitted on 19 Sep 2024
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213kWh feels like quite a lot of juice. Admittedly, I usually don't go at planing speeds.
I have an 80Ah lead-acid battery to power the electric trolling motor on my inflatable dinghy. That's 80A*12V = 0.96kWh. That gives me 5-10Nm range depending on speed. My dinghy would sink with 213kWh on board.
My 7 tonne sailboat uses ~2l/h of diesel at twice the speed. 213kWh of lead-acid would double the weight.
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