# Re: [EVDL] Solar trailer calculation

```Only to go a mile.  That doesn't take into account how long it takes the
leaf to go that mile, 65ish seconds. (55mph)```
```
Brett

On Dec 27, 2017 11:38 PM, "ROBERT via EV" <ev@lists.evdl.org> wrote:

> I do not know who does your math.  The email states "Leaf gets 4.5 miles
> per kw at 55mph more or less depending on wind."  Therefore, 1000 W / 4.5
> miles = 222 W per mile.   This appears to be a little low to me.  However,
> if it is accurate, you would need 222 W to go one mile.
>
>
>
> ________________________________
> From: EV <ev-boun...@lists.evdl.org> on behalf of Jay Summet via EV <
> ev@lists.evdl.org>
> Sent: Wednesday, December 27, 2017 4:18 PM
> To: Lawrence Rhodes; Electric Vehicle Discussion List; Lawrence Rhodes via
> EV; ev@lists.evdl.org
> Cc: Jay Summet
> Subject: Re: [EVDL] Solar trailer calculation
>
> 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 <
> ev@lists.evdl.org> 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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