Started by MountainDon, January 13, 2009, 02:18:39 AM
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Quote from: MountainDon on October 03, 2011, 04:57:41 PMBTW, 27 VDC at 7.5 amps on 60 feet of #10 copper wire comes out to a 4.03% voltage drop on my calculator. That's a tad high IMO.
Quote from: AdironDoc on October 03, 2011, 08:00:09 PMThanks, Don. Now were I to house the equipment beside the panels, and run line voltage to the cabin, would the 60ft of 12-2 wire be an issue?
Quote from: MountainDon on October 03, 2011, 08:39:43 PMMy calculator* indicates 60 feet, 120 VAC, 20 amps, 12 gauge copper = 4% voltage drop which is considered okay for AC circuits. (two conductors) * EDR, http://www.edreference.com/
Quote from: Native_NM on October 13, 2011, 08:40:20 PMInteresting...GE is going up against China:http://finance.yahoo.com/news/GE-to-build-large-solar-panel-apf-1072600519.html?x=0&sec=topStories&pos=4&asset=&ccode=
Quote from: MountainDon on October 17, 2011, 04:46:03 PMChances are you'll never "see" the difference between a theoretical 1.5 or 2.0%How many PV modules; Voc, Isc? Has the equipment been bought yet? Are you stuck with running the 27.t volts? Much better efficiency wise to be able to series the PV modules, but that requires matching the charge controller to the maximum voltage from the modules.
Quote from: Squirl on October 18, 2011, 08:29:37 AMJust curious, but have you done a solar site survey? By the looks of the picture the trees are very tall and semi close to the house. Based on my view from the photo, a roof mount would probably give you the maximum power throughout the year. Which direction is south in the photo? It looks like the spot of the proposed panels is next to the tree line.