From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-x22b.google.com (mail-qt0-x22b.google.com [IPv6:2607:f8b0:400d:c0d::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 9814C3BA8E for ; Tue, 13 Jun 2017 09:03:13 -0400 (EDT) Received: by mail-qt0-x22b.google.com with SMTP id c10so170582005qtd.1 for ; Tue, 13 Jun 2017 06:03:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=/4i8O964wck9YFA6o2IZDOUnMCJZSCfjCaxID6m4f2c=; b=eXYEzSxRpeojKbL4rDrRKmEj5CEeMrWgrnZAWQixCUvSYTiHTO/5MLsILcPoHD1TvS ohAlCzDQxDwUDCgxU6UfEt+FrA3po+DkXl/dT1Z/uoViRdWBJQI0PS4MVDz5Ka+itQ+5 sEWMmQlcvz3t/xlZEJg4PEpg1f6evPoEW9Cww3OkjPUf7xedd3B4hvp2UFVUJKxjJnLg S5hENj/L040H3zT+XogXUFneybanwukEZaTXeNqeTbrMVnWwDiRIYkUQkXSMXmvTAi1Q FA+Bn7NlBcjl1+6r3W7MRNfvv/W4HwxXt9LzuApFBDWH0415czMvb5MuIFpRqSi5+fKD kQzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=/4i8O964wck9YFA6o2IZDOUnMCJZSCfjCaxID6m4f2c=; b=PoHiTbm1KUIHjTDZKj4onuruLUOq5F6Ih/zEEnrPWKMOPfgCJWBoH6VLC6jd7ydMbk TcyD7Fo8UML4gArE+OO38nvWLfzRZiFR56zn32LV8wsPgNxYx6pkobvegJfh9braNII8 Zj5yRQIDiwIBq3CSDnT5Aye/wc39UXDTZvTRyJD7G4GEx8BL/gFYPYlgTUg1Pa7XQ2O0 b2JKadWSyyRtaw+FBRRgrMahz5YGDTlKvT1352O9QQqhh9yud1lWf39xr73WvrlD0bFx SKWjtWY2KFuKQ+KpuufbDaBoLUINGgYWTajr1RPxReTdq5f1S0vXu0bqSTiGqHyqbZk+ 2GMg== X-Gm-Message-State: AODbwcCTgvyL7/xPECzYryXPIfSllmgTkNMTSCHCIEnLXqnRqHPeQde2 Ep1gqgtioy52jlTYiVz+QRj7X0da7g== X-Received: by 10.200.54.56 with SMTP id m53mr63433571qtb.220.1497358992952; Tue, 13 Jun 2017 06:03:12 -0700 (PDT) MIME-Version: 1.0 References: <2d60e776-2a4f-de66-0d2f-a36568562f96@gmail.com> <1496685154.544113991@apps.rackspace.com> In-Reply-To: From: Christopher Robin Date: Tue, 13 Jun 2017 13:03:01 +0000 Message-ID: To: Richard Smith , cerowrt-devel@lists.bufferbloat.net Content-Type: multipart/alternative; boundary="001a113e3626e054480551d70e36" Subject: Re: [Cerowrt-devel] solar wifi ap designs? X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Jun 2017 13:03:13 -0000 --001a113e3626e054480551d70e36 Content-Type: text/plain; charset="UTF-8" On Tue, Jun 13, 2017 at 8:24 AM Christopher Robin wrote: > > On Tue, Jun 13, 2017 at 7:52 AM Richard Smith wrote: > >> On 06/09/2017 10:02 AM, Dave Taht wrote: >> >> > My use case used to be covering hundreds of km in the Nicaraguan >> > jungle. The prototype for that covers a mere 110 acres in the los >> > gatos hills, trying to get stuff deep into ravines and so on. >> >> Accounting for wost case is always what amplifies the requirements of an >> off-grid system. >> >> NASA Surface meteorology and Solar Energy claims that for Los Gatos >> December is the lowest output. Given a split-the-middle tilt alignment >> of 37 degrees it will receive average full-sun net of 3.5 hours. > > Dave: With these being tree mounted, how likely is full-sun? I'm not familiar with the tree type/density. Are you're looking to avoid having separated solar panels? Richard: I would presume these calculations are all for "open field" conditions? If the panels are under a tree canopy, a lower attack angle may be better to better utilize morning/evening sun. A higher one may be necessary to get a useful charge during peak daylight. I've seen some pretty impressive calculators to work out best guesses for field testing. --001a113e3626e054480551d70e36 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

On Tue, Jun 13, 2017 at 8:24 AM Ch= ristopher Robin <pheoni@gmail.com> wrote:

On 06/09/2017 10:02 AM, = Dave Taht wrote:

> My use case used to be covering hundreds of km in the Nicaraguan
> jungle. The prototype for that covers a mere 110 acres in the los
> gatos hills, trying to get stuff deep into ravines and so on.

Accounting for wost case is always what amplifies the requirements of an off-grid system.

NASA Surface meteorology and Solar Energy claims that for Los Gatos
December is the lowest output.=C2=A0 Given a split-the-middle tilt alignmen= t
of 37 degrees it will receive average full-sun net of 3.5 hours.

Dave: With these being tree = mounted, how likely is full-sun? I'm not familiar with the tree type/de= nsity. Are you're looking to avoid having separated solar panels?=C2=A0=

Richard: I would presume these calculations are a= ll for "open field" conditions?

If the p= anels are under a tree canopy, a lower attack angle may be better to better= utilize morning/evening sun. A higher one may be necessary to get a useful= charge during peak daylight. I've seen some pretty impressive calculat= ors to work out best guesses for field testing.=C2=A0
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