[RE-wrenches] Discrepency between inverter kWH reading and solar production meter

[Jarmo.Venalainen at schneider-electric.com]

Hi:

The difference is in the accuracy of revenue grade versus inverter KWh 
meters.  Revenue grade is typically much more accurate.

Beyond that, even if the accuracy of both was really good at lets say +/- 
0.5%, you could still get a 1% overall difference in readings as one could 
be +0.5% and other -0.5%, even though they are both working to spec.

JARMO
_____________________________________________________________________________________ 


Jarmo Venalainen  |   Schneider Electric   |  Xantrex Brand  |   CANADA  | 
  Sales Application Engineer 
Phone: +604-422-2528  |   Tech Support: 800-670-0707  |   Mobile: 
+604-505-0291 
Email: jarmo.venalainen at schneider-electric.com  |   Site: www.Xantrex.com 
|   Address: 3700 Gilmore Way, Burnaby, BC V5G4M1 








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From:
Kevin Eigel <kevin at ecohousesolar.com>
To:
RE-wrenches <RE-wrenches at lists.re-wrenches.org>, 
Date:
05/22/2015 02:38 PM
Subject:
[RE-wrenches] Discrepency between inverter kWH reading and solar 
production meter
Sent by:
"RE-wrenches" <re-wrenches-bounces at lists.re-wrenches.org>



I recently installed a Solaredge 7600 inverter and two feet away from it 
installed a GE 210 solar kWh utility grade meter. Over the course of three 
months the kWh production measured by the inverter is more than 200 kWh 
greater then the production showing on the GE meter. I  changed out the GE 
meter for the last week and the discrepancy has continued, so it looks 
like it is not the meter.
I am looking for any help in understanding whey there is this large 
discrepancy on the kWh reading between the inverter and the production 
meter, when they are so close together. The Solaredge technical help desk 
has been of no use.

-- 
Kevin Eigel
President
Ecohouse Solar
1857 Northwest Blvd. Ste 201, Columbus, OH 43212
www,ecohousesolar.com
614-805-5776

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