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Old 02-24-2009   #6 (permalink)
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C1ay
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Re: Electric power supply issues for electric cars

Quote:
Originally Posted by CraigD View Post
I am disputing that it’s an overwhelming one.
I'm not saying it's overwhelming, only that the current power grid won't support it and getting the power grid to that point is an investment that will more likely require government money instead of private money.

Quote:
Originally Posted by CraigD View Post
You’ve made a unit converting mistake here. “Watts per second” (which would be a unit of change in power) is not a normally used unit. 1 watt (a unit of power) is defined as 1 Joule per second.

\frac{1 \,\mbox{J}}{1} \cdot \frac{1 \,\mbox{W}}{1 \,\mbox{s}}\cdot \frac{1 \,\mbox{kW}}{1000 \,\mbox{W}}\cdot \frac{1 \,\mbox{hour}}{3600 \,\mbox{s}}= \frac{1 \,\mbox{kWh}}{3600000 }

so 500,000,000 \,\mbox{J} \dot= 139 \,\mbox{kWh}, not 3,000,000.
Ah yes, I see. It is still not a quantity our current power grid or battery technology can meet and it will likely require more funding that private funding will allow if we are to get there in the short term.


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Last edited by C1ay; 02-24-2009 at 12:05 PM.. Reason: merge multiple posts
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