I did some research and calculations on this subject for an trip last summer. If I remember correctly I found that an adequate solar panel weighs about the same as an weeks worth of lifepo4. So I just brought an bigger battery. And I'm glad I did as there where no sun the entire week.
La4tta Erlend 3. mai 2016 00:38 skrev "H Doug Plunkett" <hdplunk...@comcast.net>: > Lynn, > > I haven't tried it with my KX3 but I'm an avid Appalachian Trail hiker and > have run into several hikers with solar panels on top of their backpacks > charging iPhones and weather radios as they hike. Not sure if the output is > sufficient for us hams but it's probably getting there. > > Sent from my iPhone > > > On May 2, 2016, at 2:15 PM, Lynn W. Taylor, WB6UUT > <k...@coldrockshotbrooms.com> wrote: > > > > It's been a while since I've been backpacking, but this got me to > thinking.... > > > > If you're actively hiking, you can't really hang a panel on your pack > and plan on it being pointed at the sun. That means either staying put to > charge batteries, or bigger panels for faster charging, or bigger batteries > for the days you can't effectively charge, or something like that. > > > > Is solar charging in this case even practical? The bigger the panel, > the heavier the load. > > > > A quick and dirty, conservative calculation suggests that the lithiums > would be good for a couple of days of "a few hours" at 5 watts. Probably > twice that at "an hour or so." > > > > 73 -- Lynn > > > >> On 5/2/2016 9:02 AM, Walter Underwood wrote: > >> If you don’t mind non-rechargeable batteries, AA lithium primary cells > are the lightest option. They are about 0.5 ounce each, so a 3000 mAh set > weighs 4 ounces. Carrying a spare set of those will be lighter than a solar > panel. They are also 1.5 V, so you get 36 Wh from a set instead of 25 Wh > from a set of 2500 mAh NiMh cell. > >> > >> On May 2, 2016, at 7:53 AM, Joe Moffatt <j...@selectconnect.net> wrote: > >> > >> Anyhow, I am trying to figure out what to use for portable solar > rechargeable power while backpacking in the mountains. My typical trip > will be 2-3 days, a few hours a day operating primarily CW. 5 watts is > fine for CW.... > >> > > > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to hdplunk...@comcast.net > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to egrims...@gmail.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
