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Long-term testing

In the development of some types of solar cells, such as electrochemical cells (i.e. DSSC and Perovskite solar cells), aging measurements are crucial. Cells should be long-term test in a loaded condition and periodically measured their characteristics.

For this purpose, we have developed a special tracker of the maximum power point for power up to a few hundred mW. Due to its low power we named it micro MPPT - uMPPT. The circuit in addition to tracking also allows operation in open circuit, short circuit and at constant voltage.

The tracker is available as a six channels demo board, and as an instrument with hundreds of channels.

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Advantages

Flexibility

  • Full 4-wire connection to each PV cell
  • Automatic PV cell polarity detection
  • Sequential 4-wire bypass switching to SMU
  • Multiple options for cell connection

Expandability

  • 6 channels on development board
  • 24 channels per μMPPT board
  • Up to 12 μMPPT boards per 3U crate
  • Communication over RS-485, optionally also USB
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Basic specifications

  • Input range: ±1.75 V / up to 100 mA / 200 mW
  • Voltage meas. resolution: 1 mV
  • Current resolution: 4.5 digits (different range options)
  • Lowest input resistance: 4,5 Ω
  • Temperature measurement: 1-wire bus
  • Communication: RS-485, optionally also USB

    Product brochure

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    Contact

    For additional information please contact:

    • Marko Jankovec, E-mail: Marko.Jankovec[at]fe.uni-lj.si, Phone: +386 1 4768 931