55 mph / 4.5 miles per kwh = 12.22 kwh per hour or 30/12.22 = 2.45 hours of 
driving time at 55mph with 30 kwh, or 2.45x55=135 mile range at 55mph.

So, to drive continuously at 55mph  you would need a minimum input of 12,220 
watts.

Jay

On December 27, 2017 5:47:54 PM EST, Lawrence Rhodes via EV <[email protected]> 
wrote:
>Hi all,
>My math is good enough to figure out I get about my 30kw Leaf gets 4.5
>miles per kw at 55mph more or less depending on wind.  What I'd like to
>know is what size solar panel would be needed to support that speed. 
>Now don't tell me it can't be done.  I just want to know the formula
>for figuring it out.  My puny brain exploded when I thought of all the
>variables.  I do know that a 3000 watt system would charge my car in 10
>hours.  I would just like to know the numbers of what would be needed
>for continuous power at speed.  I guesstimated it would be about 10000
>watts.  I'd just like the exact number.  Thanks,  Lawrence Rhodes...the
>point is to build a teardrop solar range extender/RV that could charge
>while driving.
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