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MAX20801TPBB is a ‌ battery cascade optimizer IC‌ launched by (Maxim) specifically for photovoltaic systems. Its main function is to achieve efficient maximum power point tracking (MPPT) and enhance the energy collection efficiency of photovoltaic modules. The following are its core features:

Perform MPPT on 20 to 24 series-connected PV cells

Fast MPPT responds quickly to changes in conditions

Integrated voltage-limiting clamping output voltage

Integrated current-limiting clamp output current

The active bypass function avoids diodes and hot spots

Supports panel electroluminescence (EL) testing

Peak efficiency of 99.1%, CEC 98.7% and Euro 98.3%

Overview

The MAX20801TPBB battery string optimizer supports the realization of maximum power point tracking (MPPT) for battery strings. Compared with standard panels and panels using mod-level MPPT technology, it has excellent energy harvesting and reliability for photovoltaic (PV) modules.

Photovoltaic cells can only provide maximum power under specific electrical conditions, and these electrical conditions vary significantly with the intensity of irradiation and temperature. Serial-connected PV cells are highly sensitive to battery mismatch, resulting in power and power generation under actual conditions being lower than the optimal values. The MAX20801TPBB battery string optimizer supports PV battery strings in providing maximum overall power under a wide range of load conditions. This enhanced electrical flexibility avoids power loss caused by strings and arrays of PV modules, ultimately increasing power generation and system design flexibility.

The additional unique advantages provided by the MAX20801TPBB battery string optimizer include:

Alleviate the performance decline of PV modules during their service life

Avoid high losses associated with the conduction of bypass diodes

Limit the operating voltage of the PV module

Application scenario ‌

MAX20801TPBB is used for crystalline silicon photovoltaic modules (standard 60 or 72 cell boards) to address power loss ‌ caused by string mismatch.

MAX20801TPBB can replace the traditional module-level MPPT solution, providing a more compact (3,800mm² PCB area) and low-cost solution ‌.

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