[HamWAN PSDR] VOTE: $2k budget for Haystack site hardware

[Benjamin Krueger]

For the record, I will also contribute a YAY.


On Sat, May 3, 2014 at 9:18 PM, Bart Kus <me at bartk.us> wrote:

>  This is for the power system only.  The other items for Haystack have
> already been purchased, so there's no spending request there, and no vote
> needed.
>
> We are expanding an existing power system.  They have an existing battery
> bank and full solar system.  We're mostly adding some panels.
>
> I'm not sure what the 24->12 converter is for.  I don't have a schematic
> of their electrical wiring.
>
> I suspect the AC->24 converter is so we can interface power from a
> gasoline generator they have on-site.  It's remotely controlled, and can be
> engaged when the battery bank gets too weak.
>
> I'm not sure what the MPPT controller story is.  I already asked about
> this.
>
> Thanks for finding the AC->24 converter cheaper.  Are any other items here
> available cheaper?  Can you provide bottom-price URLs?  I'll work with them
> to understand the solar system better, make sure we're gonna be running @
> 24VDC and that we're doing things sanely.  From what I've seen of their
> engineering + setup, they're competent folks.  It would certainly be nice
> to get a better understanding of the power design these parts will embody.
>
> --Bart
>
>
>
> On 5/3/2014 3:11 PM, Tom Hayward wrote:
>
> To get this straight, this vote is for power systems at Haystack only.
> HamWAN modems, antennas, mounting hardware, cable, etc., will need another
> vote. Is this right?
>
>  I have moderate experience with solar systems, and some of the line
> items don't make sense to me.
>
>  - What is the Meanwell 24V->12V converter for? The modems run on 24V.
> What do we need 12V for?
> - What is the IOTA AC->24V converter for? I thought we didn't have AC at
> the site. Also, it's available from a seller on Amazon for $150 less than
> quoted.
> - Why is there no MPPT charge controller? Or batteries?
>
>  Tom KD7LXL
>
> On Sat, May 3, 2014 at 11:43 AM, Bart Kus <me at bartk.us> wrote:
>
>>  Hello,
>>
>> I'd like to propose we allow spending of up to $2k to cover the costs of
>> installing a photovoltaic (solar) power system @ Haystack.  The site owner
>> has allowed us to host a site up there as long as it doesn't impact their
>> power budget.  The site is not wired to any utility power, and transporting
>> propane to it is expensive.  This is a 1-time cost, and the hardware will
>> remain property of the site owner.  In exchange they'll be giving us new
>> mounting points for 2 dishes and 2 sectors, which will have a huge impact
>> on coverage and extending the network.  Our recurring cost for the site
>> will be $0/mo, which is an ideal long-term arrangement.
>>
>> Here is a list of the hardware required:
>>
>>
>>      Costs converting 12VDC to 24VDC          Item Desc Link Quantity
>> Cost Total  1 24->12VDC Meanwell  SD-50B-12
>> http://www.mouser.com/ProductDetail/Mean-Well/SD-50B-12/?qs=jVZN1Oke4Bx6867ajq9o4g==
>> 1  $51  $51  2 SolarWorld 275 Watt Mono Module
>> http://www.backwoodssolar.com/solarworld-270-watt-mono-module-1359 2  $347
>>  $694  3 30' Cable with Locking MC4 Plugs
>> http://www.backwoodssolar.com/30-cable-w-locking-mc4-plugs 2  $30  $60  4 Midnite
>> AC Din Rail Mount Breaker - 15A & 20A (15A is needed)
>> http://www.backwoodssolar.com/outback-60a-ac-breaker 2  $19  $38  5 Fuse
>> Holder and TWO 60A Class R Fuses
>> http://www.backwoodssolar.com/holder-for-100-amp-fuse 1  $28  $28  6 PV
>> Module Ground Lug/screw/nut
>> http://www.backwoodssolar.com/pv-module-ground-lug-screw-nut 2  $4  $8  7 Battery
>> Interconnect Cable - 24" - 4/0
>> http://www.backwoodssolar.com/products/batteries-accessories/battery-cables/24in-4-0-cable-with-lug-ends
>> 10  $26  $260  7a Battery Interconnect Cable - 24" - 2/0 Local ->
>> Pacific Power Battery (+$5/end to crimp) 10  $10  $100  8 IOTA Battery
>> Charger - 24V 40A - DLS27-40
>> http://www.backwoodssolar.com/iota-40a-24v-battery-charger 1  $395  $395
>> 9 Tax (.086) Sultan Mailing Address
>> http://dor.wa.gov/docs/forms/excstx/locsalusetx/localslsuseflyer_quarterly.pdf
>> 1  $78  $78.24  10 5% for cables/time/mounting etc
>> http://3.bp.blogspot.com/-yJZJIOW6lys/Twvf9ylPUGI/AAAAAAAACdk/YEUZm-ZR-QU/s1600/strongman.jpg
>> 1  $45  $45.49    Grand Total        $1,757
>>
>> In the $2k request, I'm also allowing ~$250 for shipping costs.  Solar
>> panels are large.  Anything not spent will be returned to the HamWAN budget.
>>
>> We already have all the other hardware required to deploy the site
>> in-stock.  Some of it is already deployed (Haystack-S3), and some is
>> sitting on-site (modems, 1 dish, other sector).
>>
>> Our present balance is $1,291.04, so we'd be going into debt for this
>> deal.
>>
>> The other cost of this deal is recognizing the site owner's sponsorship
>> of HamWAN by including their logo in presentations, and offering some
>> man-hours for site maintenance.  The big project this summer (aside from
>> this solar system install and the full HamWAN site install) will be helping
>> with installing a grounding system there.
>>
>> My vote on this deal is: YAY.
>>
>> --Bart
>>
>>
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>>
>
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-- 
Benjamin
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