Small lightly loaded trailers with little wind resistance can add 50-80 
Wh/mile. Taller/heavier trailers can double vehicle energy consumption.



On December 29, 2017 2:20:20 PM CST, Bill Dube via EV <ev@lists.evdl.org> wrote:
>I agree 100%.
>Folks forget that it takes significant energy to tow even a small 
>trailer. Much more than one would think. Probably more energy than the 
>panels produce, especially at highway speeds.
>
>Best to leave them on the roof of your house, or put them on a "solar 
>shed" for your car to park under at work.
>
>Bill D.
>
>On 12/29/2017 8:27 AM, Robert Bruninga via EV wrote:
>>> Personally, I think a mobile array for a vehicle is a fools errand,
>or
>>> maybe a pass-time for the independently wealthy.
>>
>> Its sure is.  I have solar panels all over the roof of my two
>priuses.  I
>> tell people that it makes 0.1% economic sense to do it.
>>
>> The smaller panels that fit the roof of a car cost TEN times as much
>per
>> watt as the big ones on my house.  And my house has ONE HUNDRED TIMES
>more
>> surface area.  Therefore the value of solar on my car is one thousand
>times
>> less practical.
>>
>> ALso, WHen I tow even my small 6 foot solar trailer (300 watts)
>behind my
>> prius, my gas mileage goes down from 55 MPG down to 42 MPG. 
>Meanwhile it
>> is only producing enough power to gain only a single 1 MPG even on
>the best
>> summer day.
>>
>> So again, the math makes no sense whatsoever.
>>
>> The value to me of my solar panels is to have power in the field
>while
>> parked at camping and Ham radio events.
>>
>> Makes NO SENSE for traction and propulsion.  See my solar car and
>trailer.
>> http://aprs.org/FD-Prius-Power.html
>>
>> Now putting solar panels on top of an RV that is used 1% of the time
>and
>> spends the other 99% of the time plugged into one's own home
>grid-tied,
>> does make sense.  Since it is providing full retail electricity 99%
>of the
>> time while parked.
>>
>> Bob, WB4PRR
>
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