Wednesday, May 4, 2011

Re: [Electric Boats] Re: Future Proof... Reason #149 Why I Love Electric Propulsion

 

Sodium batteries are better suited for large storage systems, as they rely on fragile ceramic separators. I looked into the Zebra battery for another project, but was put off by the cost vs kwh ration, and the fact that they cannot discharge if cold (solid). Sodium batteries are currently in widespread use in Japan, where they provide load leveling for the utility grid.

http://www.nextenergynews.com/news1/next-energy-news4.14.08a.html

Arby
AMeP


--- In electricboats@yahoogroups.com, "Greg Martin" <ffmagellan@...> wrote:
>
> Thanks Myles. Those numbers really put things in perspective. I think I also read somewhere that the ZEBRA batteries were mostly recommended for continuous and regular users. You're right it would not make any sense at all if you only used them a few times per month. Modec produces commercial EVs, like delivery trucks and for commercial fleets of taxis, delivery and utility trucks that work everyday and go back to the recharge station at night so it makes more sense for them, probably. For boats, maybe if you had a water taxi or a charter service or just really knew you were going to go sailing everyday- and- your grid power source was eco, then it would make sense. Where I'm at, I don't feel as bad using grid power since we get a lot of our power from wind turbines.
>
> I'm also very curious- and I admit, I'm no expert, I really do need to get smart on how to calculate this- how feasible would it be to supply that much power regularly to the ZEBRA batteries with a big enough solar array that you could have on a boat? Is that even a practical option, if you had say, a couple of 100 watt panels over a bimini? Presumably one of those big panels would have to be dedicated just to keeping the sodium hot. When they say a solar panel is rated at 100 watts, is that over 24 hrs or are you screwed at night?
>
> -Greg
>
>

__._,_.___
Recent Activity:
.

__,_._,___

No comments:

Post a Comment