Maxim replaces protection diodes with new cell-string optimizer technology

Maxim replaces protection diodes with new cell-string optimizer technology

New cell-string optimizer technology from Maxim Integrated Products allows photovoltaic (PV) panels to harvest significantly more energy and simplifies design complexity for solar installation projects.


Maxim’s cell-string optimizers are highly integrated DC-DC converters that replace the bypass diode and perform maximum power point tracking (MPPT) deep inside the PV module. By replacing each diode with a MPPT device, the on-off response to performance mismatch is eliminated; every cell-string contributes maximum power without interfering with the power production capability of others. This enhanced degree of flexibility leads to increased energy production; eliminating collateral performance loss due to module mismatch, degradation, soiling, localized shading, and row shading loss mechanisms.

Based on the company’s industry leading power semiconductor technology, Maxim’s cell-string optimizer is the first integrated power IC to perform MPPT and first to be embedded within the PV module.

Key features of Maxim’s cell-string optimizers:

  • Increases Energy Harvest: Offers best-in-class shade mitigation, providing30% additional power over diodes
  • Extends Reliability: Eliminates hotspots and minimizes the impact of power degradation mechanisms
  • Enables Flexible Design: Higher degree of flexibility to incorporate multiple string lengths, multiple orientations, and expanding modules into partially shaded areas
  • Simplifies Operation: Fully integrated solution simplifies design by requiring no additional hardware, specialized inverters, or data services

Seth Kahn, Executive Director, Solar Products, Maxim Integrated stated that “The granularity of Maxim’s cell-string optimizers offers best-in-class shade mitigation, enables flexible system design without adding complexity, and helps improve panel lifetime performance.”

“Major PV module companies have recognized the advantages of this unique technology—the first integrated power semiconductor for MPPT—and are ramping it in volume production,” Seth added further.

Maxim will be showcasing the cell-string optimizers at its partner booths at Solar Power International (SPI), September 12-15. SPI attendees can learn more about Maxim’s high-performance, cost-efficient solar cell optimizer technology by visiting the following exhibitors: ET Solar: Booth 1371; Fronius: Booth 1521; Hanwha Q CELLS: Booth 2337; JinkoSolar: Booth 2007; Suntech: Booth 1335; Trina Solar: Booth 1511.

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