Bill: You will need to install MPPT trackers from TIGO and SOLAR MAGIC on all of your modules, and not just the string in question... as far as I have been told. I have asked both outfits the same question - and was interested in SunMizer for this very reason. But SunMizer seems to be going through a change, or perhaps chrysalis. One can only wonder. Maybe you could use Enphase for just the modules in question, and use a smaller string inverter for the balance. Patrick Redgate Ameco Solar Solar California 888-595-9570 In a message dated 9/13/2010 7:48:29 A.M. Pacific Daylight Time, frene...@psln.com writes:
Gentlemen and Ladies, I'm designing a 4KW res system which has limited roof space and would like to use a certain number of panels to satisfy power requirements and inverter voltage needs. However, this would necessitate placing 2-3-maybe 4 PVs (in one string, of two string total) in a location which would recieve shade from the second story from about sunrise until, say 10:30 PDT. I'm not interested in going individual inverters on all PVs, but would appreciate feedback on the use of module level MPPT trackers such as Tigo or Solar Magic, or?? only installed on the shade affected PVs? Or must they be installed on all PVs in that string....or both strings?? Thanks in advance, Bill Feather River Solar Electric 4291 Nelson St. Taylorsville, CA 95983 530-284-7849/6544 fax
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