[RE-wrenches] Using the North Facing Roof

[Jason Szumlanski]

Chris,

Just enter the address as lat,long with negative for south or west. For
example, USVI:

18.3500,-64.9333

Leave the city, state, zip blank. No spaces.

Let me know if that doesn't work. It's going to pick the closest TMY3
weather station.

Jason



On Thu, Jul 30, 2015 at 5:42 PM, Chris Mason <cometenergysystems at gmail.com>
wrote:

> Could you add the ability to use coordinates instead of zip code,
> otherwise it is no use outside the US.
>
> On Thu, Jul 30, 2015 at 1:16 PM, Jason Szumlanski <
> jason at floridasolardesigngroup.com> wrote:
>
>> I figured while I'm at it I might as well release something else that you
>> can actually print out and present to your clients or use for your own
>> visualization purposes. This is a very similar tool that will output a web
>> page with a radar chart (like a spider web representing the compass) and a
>> data table down to the secondary intercardinal directions. Hover over the
>> points to see the value.
>>
>> http://floridasolardesigngroup.com/pva/do-site-analysis.php
>>
>> Run it at two different tilt angles and check out the differences.
>> Eventually I plan to update this to compare two (or more) tilt angles on
>> the same radar chart. For now, this is all you get. :)
>>
>>
>> Once again, enjoy!
>>
>> Jason
>>
>>
>>
>> On Wed, Jul 29, 2015 at 10:56 AM, Jason Szumlanski <
>> jason at floridasolardesigngroup.com> wrote:
>>
>>> I want to give back to this forum that has been so valuable to me, so
>>> here it is... a tool for you to quickly compile data for multiple compass
>>> orientations for a given pitch...
>>>
>>> http://floridasolardesigngroup.com/pva/do-pvwatts-wrenches.php
>>>
>>> This PVWATTS derived tool will give you 36 data points for solar energy
>>> production with every azimuth from 0º to 350º at 10º increments for a given
>>> location and pitch. You can enter your desired system size to model its
>>> output and include your desired PVWATTS derate (system loss) factor. It
>>> will download a .CSV file each time you run the tool. You can run it for a
>>> variety of tilt angles based on your needs to compile data for your own
>>> study.
>>>
>>> There are limits on use, but if everyone does not run out and use it at
>>> the same time it should be fine.
>>>
>>> Once you get your data into a spreadsheet you can easily slice and dice
>>> it any way you want and make some great visualizations.
>>>
>>>
>>>
>>>
>>> Enjoy!
>>>
>>> Jason Szumlanski
>>>
>>>
>>>
>>>
>>>
>>> On Tue, Jul 28, 2015 at 7:01 PM, Allan Sindelar <allan at sindelarsolar.com
>>> > wrote:
>>>
>>>> I am paying close attention to this thread, but for different reasons.
>>>> I have designed and will install next month an off grid system for a
>>>> high-elevation research hut. At 14,242' I believe this will be the highest
>>>> elevation off grid system in the continental US (Alaska too?), at the
>>>> Summit Hut atop White Mountain, east of the Sierra crest in eastern
>>>> California (wmrc.edu/facilities/bar/summit.html). For me it's sort of
>>>> a post-retirement summer working adventure. A nearly identical system will
>>>> serve an older observatory at 12,700' in the same area. The Summit Hut will
>>>> get a roof array where winds of 190 mph have been measured, I'm told. The
>>>> roof has about a 5º north-facing tilt.
>>>>
>>>> I'm old-school too, thinking in terms of a 25º tilt to south. But other
>>>> than powering an internet repeater all year, the system is only used during
>>>> the summer months, mid-June to mid-October, when the snow has melted and
>>>> it's accessible by a long jeep trail. So in that respect it's similar to a
>>>> flat- or north-facing array in a grid-tied system, where only summer gain
>>>> matters much and a southern tilt matters less that I want to believe.
>>>> Jason's chart is pretty useful here, suggesting that I should pay more
>>>> attention to handling wind loads with a low angle than maximizing summer
>>>> gain.
>>>> Allan
>>>>
>>>> *Allan Sindelar*
>>>>
>>>>
>>>>
>>>>
>>>
>
>
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