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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