On May 4, 2015, at 11:28 PM, Hannu Venermo gcode.fi@gmail.com [electricboats] <electricboats@yahoogroups.com> wrote:
Those batteries can deliver about 30% of the max load over 5000 cycles (vs 7000 cycles for Tesla).
So, your equivalent energy vs lion is == 30% x 2.5 kWh = 0.750 kWh.
Cost:
This is actually about 10 / 0.750 = 13.13
13.3 x 350 = 4666$ for a usable 10 kWh.
So, about a bit more (==20%) than the lion from Tesla (guaranteed to work 7 years *in daily use*).
In *daily use* no std traction battery will last more than 3-6 years at best.
Or, you can get about 50% DOD out of them for about 2-3000 cycles.
== 1.25 kWh.
Lion is actually about the same cost as other battery tech, when actual power delivered is compared.
At about 1/4 the mass and space.
On 03/05/2015 02:01, billhopen@yahoo.com [electricboats] wrote:
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
-- -hanermo (cnc designs)
Posted by: Peter Gravel <peterrgravel@gmail.com>
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