I bought 4 wheelchair batteries, sealed fiberglass mat type, strapped together in series they make up
a 50v x 50ah = 2500watt battery....that is 2.5kw .
they are heavier, 4 batteries weigh 100lbs, that's roughly 2-3 x heavier per Kwh as tesla....but who cares in a boat?,,you are not going up hills, don't need a suspension and boats need balast anyway.
the big difference is price, my 4 batteries cost $350. total (delivered cost) while my batteries are 1/4 the power...its 1/10 the cost, that is 2.5x cheaper, and fifty volts is just perfect (and safer in a salt water environment) I don't want no 450 volts when a salt water wave comes in my cockpit, and I'm standing knee deep in short circuit. I don't need an expert electrician to install them, and I just need a $15 Chinese 3000watt PWM controller to run 50v direct to my motor
That Tesla stuff is for tire screaching, San Francisco hill climbing performance, not necessary in boats
Just my opinion, I'm a low tech cheap skate
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Posted by: billhopen@yahoo.com
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