What is the wattage on that Lee. I calculate 3Watts. 0.25 X 12 V = 3 W
Harbor freight sells a 15 watt panel.
15 Watt Solar Panel

  
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      From: Lee Hart via EV <ev@lists.evdl.org>
 To: Mike Scott <mike.sc...@rennlist.net>; Electric Vehicle Discussion List 
<ev@lists.evdl.org> 
 Sent: Sunday, July 23, 2017 9:49 PM
 Subject: Re: [EVDL] JDL404 AH Meter power draw?
   
From: Mike Scott via EV <ev@lists.evdl.org>
>A small solar panel could supply that 300 mA easily with hardly any work at
>all...

300ma 24/7 is going to require a fairly large panel. I have a 12" x 9" PV panel 
that delivers 250ma *peak* (direct sun) on my Prius to keep the 12v battery 
charged. With night, cloudy days, and the non-optimum angle of the sun, it 
delivers less than 20ma average. So my guess is that you'd need several square 
feet of PV panels to get 300ma average.


--
Excellence does not require perfection. -- Henry James
--
Lee A. Hart http://www.sunrise-ev.com
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