Huawei has released a white paper regarding the safety and performance of its Smart Module Controller optimizer series.

Image: Huawei Digital Power Technologies

Huawei has released a white paper with certification agency TÜV Rheinland. It claims that its Smart Module Controller can shut down inverter voltages in 25 seconds (DC) and 11 seconds (AC).

The line features two products with rated DC inputs: 450 W for the SUN2000-450W-P2 and 600 W for the SUN2000-600W-P.

“Based on the buck circuit, Smart Module Controller Solution adopts the ‘optimizer + two-stage inverter’ architecture,” the company said. “With optimizers installed, PV modules are optimized independently to achieve maximum yield.”

Huawei conducted tests with TÜV Rheinland. In the first test, they measured the ability to shut down the maximum power point tracking (MPPT) inverter quickly.

“The only option is usually to let the PV system burn in a controlled way until all the PV modules burn out. This method will prolong the fire and cause heavier property losses,” the company said. “It is necessary to adopt comprehensive measures such as rapid shutdown technology combined with intelligent arc fault detection to improve the safety of distributed PV.”

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Test results on a shopping mall roof showed that the MPPT inverter voltage dropped to 0 V in 25 seconds (DC) and 11 seconds (AC) after disconnecting the DC and AC switch, due to the optimizer.

The mall’s roof

Image: Huawei Digital Power Technologies

Huawei also claims in its white paper that its optimizers could raise yields of PV systems by up to 30%. It said that by installing optimizers in a shaded roof area, a school could improve its yield by 25.9%.

In one test, households with older models experienced a mismatch, and those equipped with optimizers saw a 3.56% and 2.73% increase in PV energy yield compared to two households without optimizers. In another case, where old and new PV modules were used together, optimizers boosted the energy yield by 7.26%.

The company also assessed the operations and maintenance (O&M) of its optimizers, which send data to a smartphone and computer interface. According to the white paper, the system can instantly identify a faulty module and reduce the need for inspections from two to three times a month to just once.

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