Fronius inverters - Reliability? [RE-wrenches]

[Peter Parrish]

I have a question about the accuracy of the "energy supplied (kWh) total"
for Fronius inverters. Does anyone know how it is spec'd and what are the
numbers? 

In the Los Angeles DWP territory, we are required to install a "production
meter" in series with the inverter and we regularly use the GE I70S
"odometer" style meter. We buy these from Austin International and they spec
the accuracy of these meters at +/- 0.3%.

I have been regularly seeing discrepancies of up to 10% difference between
inverters and production meters. Usually, the GE meters read low compared
with the inverter.

For example, we have an IG-5100 which now reads 7,250 kWH and a GE meter
that reads 6,560 kWh. The Fronius came reading 6 kWh, presumably due to
bench burn-in testing. The GE unit came reading 9,999.

Information on the accuracy of the Fronius would be great (because in this
case I have a very puzzled customer); and if anyone is accumulating
statistics on inverters vs. production meters in general I would be
interested in what people are finding out.

- Peter

Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parrish at calsolareng.com 

-----Original Message-----
From: Darryl Thayer [mailto:daryl_solar at yahoo.com] 
Sent: Tuesday, May 27, 2008 4:17 PM
To: RE-wrenches at topica.com
Subject: [Norton AntiSpam] Re: Fronius inverters - Reliability?
[RE-wrenches]


Hi Bob
Also look at the PV Powered 1100  if you can go that
small.  I am looking forward to using my first one
later in June.

I have only a few Fronius and had no problems that I
can remember other than one did not wait to grid
reconnect.  

Darryl


--- Bob Clark <bclark at solar-wind.us> wrote:

> 
> Wrenches;
> 
> Sorry if this topic has been discussed before, but
> the search function would not work on Topica.
> 
> Fronius IG 2000 (or other Fronius inverters, for
> that matter) - are they reliable? We have heretofore
> used the SMA SB1800U (120V output), but have been
> told by our distributor that it is no longer
> available. Hence the need to consider the Fronius IG
> 2000.
> 
> 
> 
> [Non-text portions of this message have been
> removed]
> 
> 
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