trolling for Trace [RE-wrenches]

[Bob-O Schultze, Electron Connection]

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Marco,
According to my contacts at Xantrex:

>I just came across the Jan. 24 news from our friends in Arlington 
>re: the SW saga in grid-connected applications. 
>
>Several questions:
>1) Is the SW with the new 4.2 software now available from Xantrex? 
>And how about the GTIs?  Are they now ready to ship?
Yes, but the first production will be going to those systems "in 
progress" that were left in limbo due to this whole cock-up.

>2) In order to be UL-compliant, the 4.2 SW needs to be mated to the 
>GTI for utility-interactive, sell back mode, right?

Correct

>3) What about all those formerly UL-listed 4.1 software SWs out 
>there?  Can the GTI be mated to those as well or will the 4.1 
>versions need a new chip or need to be sent back to the factory for 
>something more extensive?

Current thinking is that anything already approved will stay 
approved, but that has not been universally excepted by the utilities 
yet.

>
>4) Anybody have an idea as to the efficiency hit that the GTI 
>contributes to the system's output?  According to some extensive 
>monitoring data I have seen, the overall DC to AC efficiency of the 
>SW in a grid-tied application (with batteries) can be as low as 60 
>or less percent.  Yuck.  The last thing this design needs is another 
>loss of potential power due to another piece of hardware.

No data yet, but the GTI has a transformer, so....
Best, Bob-O

>
>FYI: in the current monitoring I'm doing on our office PV system 
>using a AEI MM3000, the DC-AC efficiency is in the 80 percent range. 
>Pretty darn impressive, I think, for a battery-based system.  I'm 
>also similarly impressed with the performance of the Sunny Boy 2500U 
>out here in Hawai'i.  Real world output in December and January is, 
>according to rough estimating, in the 85-90 percent range from 
>insolation kW per square unit to AC kW fed into the grid.
>
>
>Marco Mangelsdorf, Ph.D.
>Marketing and Sales
>ProVision Technologies, Inc.
>69 Railroad Avenue, Suite A-7
>Hilo, Hawaii 96720 USA
>(808) 969-3281, fax 934-7462
>www.provisiontechnologies.com
>
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