Groups > sci.electronics.design > #446594

Re: Battery charger with solar panel

Path	csiph.com!feeder.erje.net!2.us.feeder.erje.net!newspeer1.nac.net!border2.nntp.dca1.giganews.com!nntp.giganews.com!news.astraweb.com!border6.newsrouter.astraweb.com!not-for-mail
From	Jasen Betts <jasen@xnet.co.nz>
Newsgroups	sci.electronics.design
Subject	Re: Battery charger with solar panel
Date	7 Feb 2017 03:55:19 GMT
Organization	"JJ's own news server"
Message-ID	<o7bgf7$nd2$1@gonzo.alcatraz> (permalink)
References	<o75ea0$j8l$1@l01news1.ot.hr> <o75lag$o0v$1@dont-email.me> <bimc9cl88e02e23hnvna4382cjob6vro25@4ax.com> <o75ru6$h2c$1@dont-email.me> <o75s9v$h9p$1@dont-email.me> <o7699p$2a8$1@gonzo.alcatraz> <o7b5o8$usc$2@dont-email.me>
X-Face	?)Aw4rXwN5u0~$nqKj`xPz>xHCwgi^q+^?Ri+R(&uv2=E1Q0Zk(>h!~o2ID@6{uf8s;a +M[5[U[QT7xFN%^gR"=tuJw%TXXR'Fp~W;(T"1(739R%m0YyyvgkGoPA.$b,D.w:z+<'"=-lVT?6 {T?=R^:W5g\|E2#EhjKCa+nt":4b}dU7GYBHBxn&Td$@f%.kl^:7X8rQWd[NTc"P"u6nkisze/Q;8 "9Z{peQF,w)7UjV$c\|RO/mQW/NMgWfr5$-Z%u46"/00mx-,\R'fLPe.)^
User-Agent	slrn/1.0.2 (Linux)
Lines	35
NNTP-Posting-Host	bfc7a797.news.astraweb.com
X-Trace	DXC=A9_W;_KbeRj:PIc[8_6SKeL?0kYOcDh@jRkacOIQRk8lQeen2EjlEmlh6SbOcA0WZagJ8gR`QCBhad;kAJ:`i5MbJ:WN=4\MonoJJjm2HET3<l
Xref	csiph.com sci.electronics.design:446594

Show key headers only | View raw

On 2017-02-07, rickman <gnuarm@gmail.com> wrote:
> On 2/4/2017 11:22 PM, Jasen Betts wrote:
>> On 2017-02-05, rickman <gnuarm@gmail.com> wrote:
>>> On 2/4/2017 7:35 PM, mike wrote:
>>
>>>>> And in Arizona we certainly don't lack for sunshine ;-)
>>>
>>> I believe that is only 1.5 watts.  That's barely enough to trickle
>>> charge a car battery.  I've used a 2 watt, 15 volt wall wart to trickle
>>> charge a car battery and that's just barely enough running 24/7.
>>
>> How can you tell it's just barely enough?
>
> You clipped my example. 

Huh? I quoted all that arrived here.

> It would take a full day to charge a slightly run down battery. 

"barely enough" is, to my mind less than twice the self discharge rate.

> If it was fully down it would take three days.  

If the vehicle can sit for 4 weeks (without the battery being fully depleted) 
and then recover on that charger in only 3 days, I'd say it's got
at-least 8 times excess capacity (for for the task of preventing unattended
discharge)

> I've measured the current it supplies and I see very little difference 
> when it is run down or fully topped off.

That is not unusual in a constant-current charger.

-- 
This email has not been checked by half-arsed antivirus software

Thread

Battery charger with solar panel gm <notmy@mail.com> - 2017-02-04 21:41 +0100
  Re: Battery charger with solar panel Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-02-04 13:49 -0700
  Re: Battery charger with solar panel Baron <baron@linuxmaniac.net> - 2017-02-04 21:39 +0000
  Re: Battery charger with solar panel rickman <gnuarm@gmail.com> - 2017-02-04 17:05 -0500
  Re: Battery charger with solar panel mike <ham789@netzero.net> - 2017-02-04 14:42 -0800
    Re: Battery charger with solar panel Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-02-04 16:00 -0700
      Re: Battery charger with solar panel mike <ham789@netzero.net> - 2017-02-04 16:35 -0800
        Re: Battery charger with solar panel Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-02-04 17:38 -0700
        Re: Battery charger with solar panel rickman <gnuarm@gmail.com> - 2017-02-04 19:42 -0500
          Re: Battery charger with solar panel Jasen Betts <jasen@xnet.co.nz> - 2017-02-05 04:22 +0000
            Re: Battery charger with solar panel mike <ham789@netzero.net> - 2017-02-04 23:26 -0800
              Re: Battery charger with solar panel rickman <gnuarm@gmail.com> - 2017-02-06 19:55 -0500
            Re: Battery charger with solar panel rickman <gnuarm@gmail.com> - 2017-02-06 19:54 -0500
              Re: Battery charger with solar panel Jasen Betts <jasen@xnet.co.nz> - 2017-02-07 03:55 +0000
                Re: Battery charger with solar panel rickman <gnuarm@gmail.com> - 2017-02-06 23:41 -0500
        Re: Battery charger with solar panel Jeff Liebermann <jeffl@cruzio.com> - 2017-02-04 18:17 -0800
          Re: Battery charger with solar panel rickman <gnuarm@gmail.com> - 2017-02-04 22:36 -0500
            Re: Battery charger with solar panel Jeff Liebermann <jeffl@cruzio.com> - 2017-02-05 01:03 -0800
  Re: Battery charger with solar panel Don Y <blockedofcourse@foo.invalid> - 2017-02-04 22:02 -0700
  Re: Battery charger with solar panel dakupoto@gmail.com - 2017-02-04 22:25 -0800
  Re: Battery charger with solar panel boB <boB@theresnoplacelikehome.com> - 2017-02-05 16:38 -0800

csiph-web