Atec Solmetric-PVA-600 - Manual (Page 3)

PV Analyzer User Interface PV Model Choices
Performance verification meth-
ods always require comparison of
measured results with a reference
standard. For installed PV arrays,
the standard is a PV model. The
Solmetric PV Analyzer compares
measured and modeled array per-
formance, taking into account the
existing irradiance and temperature.
Three built-in models ensure cover-
age of all types of PV modules:
1. Sandia model
• The most comprehensive
PV model
• Developed by Sandia
National Laboratories
• Based on module
measurements taken in
independent laboratories
• Accounts for all performance-
related factors of a PV module
• Data for over 400 modules
is included
2. Five-parameter model
Allowing for coverage of a broader
range of PV modules, this ad-
vanced model is derived from mod-
ule data sheet specifications. Data
for over 1700 modules is included.
3. Single-point model
This model predicts the maximum
power voltage and current at the
existing irradiance and tempera-
ture. Based on data sheet values,
this model can be used with almost
any PV module with basic specifi-
cations.
I-V and P-V curves
of a healthy PV
string. Start/Stop
inverter voltage
range is highlighted
in green.
Complete
description of
the PV array
enables accurate
performance
predictions.
I-V and P-V curves
of a string with by-
passed cell strings.
Tabular summary
compares predicted
and measured
results. “Snapshot”
function allows
comparison of
multiple results.