 I-V Tracing and Maximum Power Point Tracking (MPPT)
up to 6 solar cells simultaneously Continuously plot light intensity & temperature data along with Pmax
 Each sample can have a capacity up to 10 V & 1 A
 Comes with dedicated user friendly control software State-of-the-art wireless communication with PC software

Specifications
Number of Channels

6Measurement Range

PhotodiodePyranometers

Temperature
Measurements(K-type)1

3

1

light intensity Measurements

PV devices

Voltage: 10 V – 120 mV (5 Measuring Ranges)

Maximum Resolution(Max. 6½-digits)

Auxiliary Outputs
Relay Output (10A)Open Drain

12

Current: 1 A – 20 uA (16 Measuring Ranges)

Current

Voltage

Voltage Setting

3 pA

16 nV

162 μV

Measuring TechniqueThis 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 photodiodeafter 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 measurements
Six 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 besaved 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 VAC (50-60 Hz) 2A , 230 VAC (50-60 Hz) 1A

Dimensions, Weight

320 mm(W) x 450 mm(D) x 150 mm(H) , ~7 kg

Electrical Standard

Features of Solar Cell I-V Tracing Function
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-Voption allows initial, middle, and end point holding times. I vs. t transient plot for selected data points under a selected fixed voltage. “Programmedcontinuous 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 tocalculate power conversion efficiencies. Also, the control software includes dedicated I-V curve fitting function.
Features of Maximum Power Point Tracking (MPPT) Function
The analyzer search for each cell’s maximum power point (MPP) andkeep tracking MPP continuously. Control software plots Pmax ,Vmpp ,Impp, and conversion efficiency vs. time curves for all connected cellswith the light intensity. Also display current/power vs. voltage plots
for each cell in a separate graph.

SPD Laboratory, Inc.

2-35-1 Johoku, Hamamatsu, 432-8011, JAPAN
Tel: +81-53-474-7901 Fax: +81-53-401-7080
Email: inq@spd-lab.com
Web: http://www.spdlab.com/English/VK-MPA-100.html