Another option would be to locate the inverters near the grid and run the DC at as high a voltage as possible. Have a separate run of wire for each of the 5 inverters. If you ran the DC at 500 V, an 11.4 kW inverter would only draw 22.8. A. Use 2/0 AL for a little over 1% VD at full power.
----- Original Message ----- From: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> To: "RE-wrenches" <RE-wrenches@lists.re-wrenches.org> Cc: Sent: Mon, 17 Sep 2018 09:42:01 -0700 Subject: [RE-wrenches] Step-up/Step-down Transformer question Wrenches, We have a PV array situated about 900' from the POI (240V 1PH). We initially spec'd (5) 11.4kW inverters and the combined output would be 238A. The wire size required for this current over that distance is cost prohibitive. A solution was to use a single 50kW 3 phase inverter at the array and then convert it to 240V... somehow? Is anyone familiar with how to go about doing this? My thought was to have a step down transformer at the POI and pull off two legs to get 240V. Is this even a thing? The other, more expensive option is to use a step up transformer at the array and a step down at the POI to get us a smaller wire size. Thanks for any input. -- Loren Ortiz Commercial PV Designer lo...@cal-solar.com [1] (530) 274-3671 [2] SHOWROOM LOCATED AT: 149 E MAIN ST. GRASS VALLEY, CA 95945 Links: ------ [1] mailto:lore...@cal-solar.com [2] http://californiasolarco.com/referral-program/
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