nothing to be sorry about .I was NOT suggesting DOING anything illegal. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Allan Sindelar Sent: Thursday, March 26, 2009 6:28 PM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Battery based grid tie question.
Sorry, Tump, The SW lost its UL listing for Rev. 4.01 software around 2000. The GTI, used with Rev. 4.10 was relisted for grid-interactive use. At least in our area, GT systems with pre-GTI SW's were allowed to remain in service, as they were grandfathered in. However, no pre-GTI SW can be used in a new GT application. It's not listed for GT operation any more. What you are recommending can only be used by "getting away with it" if an inspector or utility isn't aware of this history, but it's not "legal". Besides, while it's not cost-effective to replace any SW's with more efficient GTFX's, I would not use a SW in a new GT application anyway. They are an early technology and quite inefficient in GT use, due to both the lack of a "silent sell" topology and their fundamental us of the grid at night to maintain float voltage (thee are related aspects of the same issue). According to posts here on this issue any years ago, te SW is around 55% efficient overall in GT mode, if I recall correctly. Allan at Positive Energy _____ From: re-wrenches On Behalf Of Tump What year are the SWs? they have had grid inter tie for years, if the inverters were manufactured prior to I think 2001 then you do not need to have the gti box installed. If the guys on a budget why spend the extra $$$$? Its not the most efficient it certainly cheaper. -----Original Message----- From: re-wrenches On Behalf Of robert ellison On a similar question to what works well together. I am rebuilding the wind side of an old off grid system that the new owner has brought the grid in. He wants to grid tie the system. Another dealer is doing the solar side of things. My thoughts are the 48 volt SW inverters need to go, and replace them with Outback 48 volt grid tie units and have the wind keep the battery up. Am I correct that when the batteries are full from what ever source the outbacks will grid connect and net meter any excess power to the grid? Seems that I remember that they will but almost never get a call for grid tie up here in the sticks so I figured I would ask the knowledge base. I would suggest he keep the SW inverters to generator charge in case of a long power outage as last I knew the Outbacks (FX) did not care for generator power.
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