The way I understood it was if out of 799.2 hour span (33.3 days * 24 hours/day) there was 24 hours of sunlight.
Meaning for every ~800 hours at least 24 of them the sun was in the air hitting the solar panel. The other 776 was darkness. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 "When you have eliminated the impossible, that which remains, however improbable, must be the truth." --- Sir Arthur Conan Doyle On Thu, Aug 27, 2009 at 1:57 AM, Christopher Erickson < christopher.k.erick...@gmail.com> wrote: > Could be but that isn't right either. > > 24 hours of daylight is not the same as 24 hours of full current charging. > > The Sun rises and the Sun sets. > > Latitude and seasons aside, an 80 watt panel is only going to give about > 450 watt-hours a day at absolute best. > > -Christopher Erickson > > > > -----Original Message----- > > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]on > > Behalf Of os10ru...@gmail.com > > Sent: Wednesday, August 26, 2009 10:43 PM > > To: WISPA General List > > Subject: Re: [WISPA] solar site > > > > > > I don't think his 24 hours of sun number meant in one 24 hour period. > > I think he meant 24 hours of sun cumulative over 33 days. No? > > > > Greg > > > > On Aug 27, 2009, at 12:01 AM, Christopher Erickson wrote: > > > > > First, the Sun never shines 24 hours in a day unless you are above > > > the Arctic circle. And even then, that only happens for a few days > > > of the year. > > > > > > Second, there isn't much charging going on when the Sun is near the > > > horizon, which is most of the time when in Northern latitudes. > > > > > > For example, an 80 watt panel will NEVER output 80 watts in Anchorage, > > > Alaska because even at solar noon in the summer, the Sun is only > > > around 60 degrees up in the sky. And below about 25 degrees, there > > > isn't any charging going on at all. > > > > > > So anyway think of an amperage sine wave that builds up in the > > > morning, > > > peaks at solar noon and then diminishes in the afternoon. > > > > > > The math is more complicated than it first appears. > > > > > > "My advice is always free and worth every penny!" > > > > > > -Christopher Erickson > > > Network Design Engineer > > > 5432 E. Northern Lights Blvd., Suite 529 > > > Anchorage, AK 99508 > > > > > > > > > > > >> -----Original Message----- > > >> From: wireless-boun...@wispa.org [mailto:wireless- > > >> boun...@wispa.org]on > > >> Behalf Of Mike > > >> Sent: Wednesday, August 26, 2009 9:06 PM > > >> To: WISPA General List > > >> Subject: Re: [WISPA] solar site > > >> > > >> > > >> I'm not sure I buy into your math. If I have a repeater site that is > > >> pulling 1A @ 12V, then it is consuming something like 12W, right? If > > >> I have 60W of solar panel (2 toys) then when conditions are optimal, > > >> I have 48W left over to charge the battery. > > >> > > >> Lets say I am REALLY north, and the panels are only producing 45W. I > > >> still am consuming 12W with the radios, and have 33W left over to > > >> charge the battery. If I have an 800AH battery 24 Hours of sun will > > >> run the radios AND fully charge the battery. If the sun shines 24 > > >> hours out of 33.3 days, I will stay ahead of the curve and the > > >> battery will stay charged. > > >> > > >> No sun for 33.3 days and my 800AH battery will finally die. I NEVER > > >> see those conditions here in the midwest. I'll still maintain you > > >> can do a repeater site for $500 in solar power costs and if you > > >> monitor battery condition it will work just fine. > > >> > > >> At 09:54 PM 8/26/2009, you wrote: > > >>> Here in the north, I wouldn't bother with anything less than 100w of > > >>> panel. > > >> > > >> > > >> > > >> > > >> ---------------------------------------------------------------------- > > >> ---------- > > >> WISPA Wants You! Join today! > > >> http://signup.wispa.org/ > > >> ---------------------------------------------------------------------- > > >> ---------- > > >> > > >> WISPA Wireless List: wireless@wispa.org > > >> > > >> Subscribe/Unsubscribe: > > >> http://lists.wispa.org/mailman/listinfo/wireless > > >> > > >> Archives: http://lists.wispa.org/pipermail/wireless/ > > > > > > > > > > > ---------------------------------------------------------------------- > > ---------- > > > WISPA Wants You! Join today! > > > http://signup.wispa.org/ > > > > > ---------------------------------------------------------------------- > > ---------- > > > > > > WISPA Wireless List: wireless@wispa.org > > > > > > Subscribe/Unsubscribe: > > > http://lists.wispa.org/mailman/listinfo/wireless > > > > > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > > > > > ---------------------------------------------------------------------- > > ---------- > > WISPA Wants You! Join today! > > http://signup.wispa.org/ > > ---------------------------------------------------------------------- > > ---------- > > > > WISPA Wireless List: wireless@wispa.org > > > > Subscribe/Unsubscribe: > > http://lists.wispa.org/mailman/listinfo/wireless > > > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > -------------------------------------------------------------------------------- > WISPA Wants You! 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