PV Power Analyzer VK-MPA-100 Specifications

Number of Channels

PV Device
Light intensity  Measurements
Temperature
Auxiliary Outputs

Measurement Range

Voltage: 10 V
Current: 1 A
with 5½-digits resolution

Measuring Technique

This analyzer consists of 6 independent programmable-electronic-loads. Simultaneous I-V tracing is possible. During MPPT measurements, each sample is separately maintained at its maximum power point by the MPPT algorithm in the microcontroller firmware. 

Light Intensity Measurement

Incident light intensity and temperature data are continuously obtained during I-V tracing and MPPT measurements. Si Photodiode Port: The analyzer has a built-in trans-impedance amplifier to measure the short circuit current of calibrated Si photodiode. Si photodiode (Hamamatsu Photonics)  is provided with the system. Also, customer can use their own photodiode after modifying the calibration constant value in the “Advanced Settings” section of the software.     Pyranometer Port : Up to 3 pyranometers can be connected as the light measuring sensors.

Sample Connecting Ports

Six set of 4-wire connectors for samples

A/D & D/A Converters

Two separate 24-bit ADCs for simultaneous voltage and current measurementsSix separate 16-bit DACs for setting cell voltages.Light Intensity data is measured using 24-bit ADC  

Control Software

Dedicated user-friendly computer software is provided to control all of the functions and data logging. Measurement data can be saved as a text file (.csv or .txt) and directly plotted as a ®Microsoft Excel graph. The customer should prepare a Windows-based PC (with Bluetooth) to install this control software.
(If you wish to have a new laptop PC, you can order as a separate option from us) 

Communication

Measured data wirelessly transfer to PC through Bluetooth for visualize on graphs.  USB connection also posiible.

Power Requirement

100 – 240 VAC (50-60 Hz)

Electrical standard

Dimensions

320 mm x 450 mm x 150 mm

Weight

7 kg

Main Functions

Solar Cell I-V curve Tracing

Up to 6 solar cells can be connected to the analyzer. User selectable START, END and STEP voltages. Plots current and power vs. voltage curves.  Calculated results include  Voc, Isc, Jsc, Pmax, Vmpp, I mpp, FF, Rs, RSH, ƞactiveA, and ƞgeoA. User can set the desired scan speed, scan time, or holding time. Advanced I-V option allows initial, middle, and end point holding times. I vs. t transient plot for selected data points under a selected fixed voltage. “Programmed continuous I-V” function allows user to take series of IV curves  with given time intervals. Incident light intensity data also measured during I-V and used to calculate power conversion efficiencies. Also, the control software includes dedicated I-V curve fitting function.

Maximum Power Point Tracking (MPPT)

The analyzer search for each cell’s maximum power point (MPP) and keep tracking MPP continuously. Control software plots Pmax ,Vmpp , Impp, and  conversion efficiency vs. time curves for all connected cells with the light intensity. Also display current/power vs. voltage plots for each cell in a separate graph.