[RE-wrenches] Transmitting 15kW 3600ft Off Grid.

[Chris Mason]

I would use a 6,600V single phase outdoor pad mounted transformer pair and
deep bury a single #2 direct burial cable. Easy and quick.

On Mon, Jan 10, 2022 at 7:34 AM Foxfire Energy <dan at foxfire-energy.com>
wrote:

> Hi Guys, Got a good one for you.. We were tasked to refurbish a Stand
> Alone (aka Off Grid) power system on a 100 acre private resort island off
> the New England coast a few years back.. The system has a 12kW(AC)/ 48VDC
> power center (@120/240VAC) with a 10kW Bergey wind turbine, 3kW of Solar
> and a 12kW Diesel Generator.. It currently powers two main lodges and 10
> private cabins.. The system was never installed properly and had
> significant damage when we got there (no system ground, evidence of several
> lightening strikes, open/corroded connections, and poor workmanship in
> general)
> The new owners want to build a third lodge at the other end of the
> island.. Some 3600ft away, and want to feed full power from the existing
> system to the new lodge.. Thing is, the new owner is pretty brainy (keeps
> me on my toes).. My first thought was to bump the 120/240VAC up to 480VAC
> and send it on like 4/0AL and back down to 120/240VAC at the new lodge
> (we've done it before).. The new owner wants to launder the AC to DC and
> back for transmission.. Says DC for transmission is the new Cats Pajamas
> because of the efficiency.. News to me.. Anyone have experience with DC for
> transmission? Again.. I'm shooting for 15kW (including 25% for continuous
> duty), 3600ft, 600V wire (but could go with a different wire) and a line
> loss under 5%. TIA db
>
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-- 
Chris Mason
Solar systems designer
Generac Generators Industrial technician

Comet Systems Ltd DBA Comet Solar
Anguilla Cell  264.235.5670
WhatsApp 264.235.5670
Skype: netconcepts
www.cometsolar.com <http://www.cometenergysystems.com/>
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