We have been looking at the Blue Oak line of fused combiners/load break rated DC disconnects, but can't get the right fit / cost. Maybe a couple would do the trick at the array for you? -Glenn Burt
_____ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Sunday, December 20, 2009 2:02 PM To: RE-wrenches Subject: [RE-wrenches] DC disconnect placement Friends: I am embarking on a 10 Kw ground mount grid-tie installation. The client prepared for this installation some time ago by stubbing a PVC conduit underground towards the future location of the PV array. Prior to beginning this job, an excavation contractor intercepted the empty conduit with a backhoe. No harm was done because this conduit was empty. Had this conduit been filled with PV feeders, it would have been very necessary to be able to disconnect the PV arrays, both for safety and to prevent a brush fire in our very dry climate. The inverters will be located in a pump house about 130 feet from the PV arrays. I would not normally put disconnects at the array and they are not required. This scenario, however, has caused me to reconsider. The design now calls for a disconnect at each row of modules. I feel that it would not be prudent to delete this important safety item. I wish there were a better selection of compact, low profile disconnects suitable for a roof-top installation. I have put external handle disconnects on roof but they look terrible. I may specify touch-safe fuse holders inside of a Sola Deck for future comp roof jobs. I am not sure what we will do with tile roofs. It seems to me that every source of power should have a means of disconnection as close to the source as possible. This is just common sense. William Miller Please note new e-mail address and domain: William Miller Miller Solar Voice :805-438-5600 email: will...@millersolar.com http://millersolar.com <http://millersolar.com/> License No. C-10-773985
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