[Mesh] Solar Wi-fi Repeater?

[Jenny Ryan]

sweet, max!! i'd also suggest taking a gander at elektra's open hardware
mppt controller project <https://github.com/elektra42/freifunk-open-mppt>,
which she presented at last year's battlemesh
<https://www.youtube.com/watch?v=NLP4MxQp8kk> (juul is the one asking mad
questions at the end lol)

are you proposing a sudo mesh budget to build a prototype? if so, we can
put it on the agenda for an upcoming meeting.

thanks also to shaddhi for sharing your knowledge - glad you're on this
list! :)

<3

Jenny

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On Sun, Apr 1, 2018 at 9:41 PM, Shaddi Hasan <shaddih at gmail.com> wrote:

> I believe Nano M2's are ~6W. The data sheet lists it as 5.5W, ubnt is
> usually pretty accurate on power consumption for sizing off-grid systems in
> my experience.
>
> I recommend checking out http://wndw.net/ for guidance on sizing the
> power system if you're looking for more info. Even if you're shooting for
> 20hrs/day of uptime, it's *generally* better to size for at least 2 days of
> uptime w/o sunlight (effective hours of sunlight; cloudy and foggy days are
> effectively zero sunlight days). The bay area is pretty easy 'cause we have
> good weather but if you want 90% uptime for the year (which is low, in
> practice) you'll want at least a day of backup.
>
> Also consider getting a timer of some sort to shut the device off if you
> don't need it active at night! That will really save on your power budget.
>
> On Sun, Apr 1, 2018 at 9:01 PM, Max Schwartz <maxschwartziv at gmail.com>
> wrote:
>
>> *I'm putting together a solar wi-fi repeater for peoplesopen.  Does
>> anyone have a number for average power consumption for the Ubiquiti
>> NanoStaton loco M2?  Know of any cheaper/better components? *
>>
>>
>>
>>
>>
>>
>>
>> *ItemCostSpecsBattery
>> <https://www.amazon.com/dp/B0010Z4MDK/ref=psdc_389574011_t1_B018IU1XSQ>$1712V,
>> 5A, 60WCharge controller
>> <https://www.amazon.com/Y-SOLAR-Waterproof-Controller-Lead-acid-Discharging/dp/B00XTQ76WW/ref=sr_1_20?ie=UTF8&qid=1522631531&sr=8-20&keywords=solar+panel+with+charge+controller>$135A,
>> 12V, 60W panel maxSolar Panel
>> <https://www.amazon.com/Polycrystalline-Solar-Panel-Module-Charging/dp/B01IFJ73X4/ref=sr_1_7?ie=UTF8&qid=1522634307&sr=8-7&keywords=20w+solar+panel>$3820W,
>> 20.5”x14.4”Wifi Repeater
>> <https://www.amazon.com/dp/B00HXT8FFI/ref=psdc_1194486_t1_B00DCNRTAG>$45Datasheet
>> <https://drive.google.com/open?id=1DfxWDUMRfWqSYGr9rSBUCFbibCPe-0vB>, Sales
>> page <https://www.ubnt.com/airmax/nanostationm/>, 5.5W max power, Up to 24V
>> DC inputTotal Cost including tax and shipping(17+13+38+45)*(1.1)+10 =
>> $135Power AuditThe wifi repeater claims a “max power of 5.5W” I’m hoping
>> that average power requirements are less than this?  Assumptions (24hr
>> period):3W continuous average power usage20 hour up time4 hours of direct
>> sunlight (source
>> <https://solarpowerrocks.com/solar-basics/how-much-electricity-does-a-solar-panel-produce/>)85%
>> charge efficiency (source
>> <https://www.solar-facts.com/batteries/battery-charging.php>)Power
>> generation:4hr * 20W * 0.85 = 68 WhPower consumption ?:3W * 20hr = 60Wh*
>>
>>
>>
>>
>> --
>> Max Schwartz
>> maxschwartziv at gmail.com
>> 314-578-4503 <(314)%20578-4503>
>>
>> _______________________________________________
>> mesh mailing list
>> mesh at lists.sudoroom.org
>> https://sudoroom.org/lists/listinfo/mesh
>>
>>
>
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