<div><br><div class="gmail_quote"><div>On Tue, Jun 13, 2017 at 8:24 AM Christopher Robin <<a href="mailto:pheoni@gmail.com">pheoni@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><br><div class="gmail_quote"><div>On Tue, Jun 13, 2017 at 7:52 AM Richard Smith <<a href="mailto:smithbone@gmail.com" target="_blank">smithbone@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 06/09/2017 10:02 AM, Dave Taht wrote:<br>
<br>
> My use case used to be covering hundreds of km in the Nicaraguan<br>
> jungle. The prototype for that covers a mere 110 acres in the los<br>
> gatos hills, trying to get stuff deep into ravines and so on.<br>
<br>
Accounting for wost case is always what amplifies the requirements of an<br>
off-grid system.<br>
<br>
NASA Surface meteorology and Solar Energy claims that for Los Gatos<br>
December is the lowest output. Given a split-the-middle tilt alignment<br>
of 37 degrees it will receive average full-sun net of 3.5 hours.</blockquote></div></div></blockquote><div><br></div><div>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? </div><div><br></div><div>Richard: I would presume these calculations are all for "open field" conditions?</div><div><br></div><div>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. </div></div></div>