© EPS Stromversorgung in 2022, this information is subject to change without notice
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30000800_manual_psb_10000_4u_30kw_en_04
Following parameters can be configured for tracking mode
MPP2
:
Value
Range
Description
U
OC
(open circuit voltage)
0...
U
Nom
Voltage of the unloaded solar panel, taken from the panel specs
I
SC
(short-circuit current)
0...
I
Nom
Short-circuit current, taken from the panel specs
Tracking interval (Δt)
5...60000
ms
Interval for measuring U and I while finding the MPP
Delta P
0...
P
Nom
Tracking/regulation tolerance below the MPP
3.11.17.3 Mode MPP3
Also called “fast track”, this mode is very similar to mode MPP2, but without the initial step which is used to find the actual
MPP, because mode MPP3 would directly jump to the power point defined by user input (U
MPP
, P
MPP
). In case the MPP values
of the equipment under test are known, this can save a lot of time in repetitive tests. The rest of the function run is the same
as with MPP2 mode. During and after the function, the least acquired MPP values of voltage (U
MPP
), current (I
MPP
) and power
(P
MPP
) are shown in the display.
Following parameters can be configured for tracking mode
MPP3
:
Value
Range
Description
U
OC
(open circuit voltage)
0...
U
Nom
Voltage of the unloaded solar panel, taken from the panel specs
I
SC
(short-circuit current)
0...
I
Nom
Short-circuit current, taken from the panel specs
U
MPP
(max. power point)
0...
U
Nom
Voltage in the MPP
P
MPP
(max. power point)
0...
P
Nom
Power in the MPP
Tracking interval (Δt)
5...60000
ms
Interval for measuring U and I while finding the MPP
Delta P
0...
P
Nom
Tracking/regulation tolerance below the MPP
3.11.17.4 Mode MPP4
This mode is different to the others, because it does not track automatically. It rather offers the choice to define a user curve
by setting up to 100 points of voltage values, then track this curve, measure current and power and return the results in up to
100 sets of acquired data. The curve points can only be loaded from a USB stick. Start and end point can be adjusted as well,
Δt defines the time between two points and the function run can be repeated up to 65535 times. Once the function stops at
the end or due to manual interrupt, the DC input is switched off and the measured data is made available. After the function,
the acquired set of data with the highest actual power will be shown in the display as voltage (U
MPP
), current (I
MPP
) and power
(P
MPP
) of the MPP. Going back on the screen with
Back
then allows for data export of the 100 measured results to USB stick.
Following parameters can be configured for tracking mode
MPP4
:
Value
Range
Description
Start
1...End
Start point for the run of x out of 100 subsequent points
End
Start...100
End point for the run of x out of 100 subsequent points
Repetitions
0...65535
Number of repetitions for the run from Start to End
Tracking interval (Δt)
5...60000
ms
Time before the next point
3.11.17.5 Load curve data from USB stick for mode MPP4
Curve point data (only one voltage value per point), in form of a CSV file, is loaded from USB stick. See section
1.9.6.5 for the
naming convention. Contrary to manual adjustment where you can define and use an arbitrary number of points, loading
from USB requires the CSV file to always contain the full number of points (100), because it can’t define which one is start
and end. However, the on-screen setting for
Start
and
End
point remain valid. It means, if you actually want to use all 100
points from your loaded curve, you must set the parameters according.
File format definition:
•
The file must be a text file with appendix *.csv
•
The file must contain only one column of voltage values (0... rated voltage)
•
The file must exactly 100 values in 100 rows, no gaps
•
The decimal separator of broken values must follow the setting “Log file separator format” where selection
US
means dot
as decimal separator and selection
Standard
means comma
