Sunday, March 22nd, 2009 | Author:

If you own an old Trace Sun Tie, it’s time to turn that puppy in. Chances are, if you have one, you have had a miserable experience with it. One of our customers is on his third STXR which now seems to working fine. Trace’s Sun Tie inverters were recently de-UL listed for problems with islanding, whereby when the grid went down, they still continued to push power to the grid. This is dangerous for the line workers. This has since been fixed and they’re back on the U.L. Trace must live by the third-times-a-charm rule because the new one, as far as I can tell, works pretty well. The new units have MPPT which has successfully lengthened daily up time and power production.

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