4 Using the PVA-600 Software
4-3
Name
Description
Detailed Performance Model
:
Modules
: the
Change…
button is used to select the
module manufacturer and module number.
Sandia
: selects the Sandia performance calculation
model. This model accounts for all performance
related factors of a PV module and is based on
module measurements taken in independent
laboratories.
5 Parameter
: selects the 5 Parameter performance
calculation model. This model is derived
from module data sheet specifications and
independent laboratory tests where
available.
Once a module is selected from the dropdown list, either
or both of these models will be available, depending on
the data availability.
Simple Performance Model
:
Edit
button: accesses the screen for entering the
manufacturer‘s published module
specifications. This model predicts the
maximum power voltage and current at the
existing irradiance and temperature. Based on
data sheet values, this model can be used with
almost any PV module with basic
specifications.
NOTE –
While default values are included in the Simple
Performance Model screen, you will have to
replace these values with those from your desired
module.
# of Modules in String
: enter number of modules in series.
# of Strings in Parallel
: enter number of modules or strings in
parallel.
CAUTION –
Conventional
PV modules and strings can
be measured in parallel up to the specified
current limit of the PVA-600. However,
high-efficiency modules and strings should
NOT be measured in parallel. The large
current transient produced by these
modules can electrically stress the
instrument.
Inverter
: the
Change…
button is used to select the inverter
manufacturer and model number. The maximum power
tracking voltage range of the selected inverter will be
displayed as a green shaded region superimposed on
the I-V curve.
