Hi William, The PV side has to be ungrounded. the inverter provides GFDI. The AC side is as normal. If one is installed both of the DC side conductors have to be disconnected at the same time. If one of the DC conductors becomes grounded it will blow the AC side OCPD. There is a large AC signal on the DC side. Darryl
--- On Tue, 9/28/10, William Miller <will...@millersolar.com> wrote: From: William Miller <will...@millersolar.com> Subject: [RE-wrenches] Tranformless inverter To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> Date: Tuesday, September 28, 2010, 11:52 PM Wrenches: I received an advertisement from a distributor that SMA is now shipping 8, 9 and 10 KW transformerless inverters. Don't these require double insulated PV wiring and no connection to ground on the AC side? It's been too long since this subject last crossed my desk and I want to refresh my memory on the specifics. 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 License No. C-10-773985 -----Inline Attachment Follows----- _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
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