Today, we're discussing a hidden hazard in photovoltaic (PV) modules

—microcracks

These tiny cracks

are like internal injuries within the module

potentially impacting your power station's energy generation!

PV cells are incredibly thin and fragile

During production, transportation, and even daily operation

temperature fluctuations and mechanical stress can cause

cracks that are difficult to detect with the naked eye

Don't underestimate them—they can lead to localized power loss

or even cell failure

ultimately affecting the entire module's power generation capacity

The dense "metal lines" on the cell are fine grid lines

which collect current and feed it into the main grid lines

If microcracks cause the fine grid lines to break

the current flow is disrupted

preventing efficient collection into the main grid

This is similar to an underground water supply system

The fine grid lines are like branch pipes, and the main grid lines are the main pipes

A branch pipe rupture

hinders water flow to main pipelines

and the water supply efficiency in that area decreases significantly

The current collection process in PV modules is very similar

In reality, the risk of microcracks is everywhere

Welding and lamination during production

vibrations during transportation

and wind, snow, and temperature changes during operation

can all cause microcracks

Tongwei's 908 technology

was developed to effectively combat these risks!

TNC 2.0 Modules

as flagship products equipped with 908 technology

offer comprehensive upgrades

In terms of design

TNC 2.0 modules have up to 24 current channels per cell

providing more dense support networks compared to

SMBB modules with 18 channels of the same type

This enhances their ability to distribute stress

naturally reducing the risk of microcracks

and significantly improving mechanical resistance

In production

optimizing key manufacturing processes

significantly reduces the likelihood of microcracks from the source

In transportation

TNC 2.0 modules have passed the rigorous

IEC62759 transportation vibration test

fully validating their reliability

During power station operation

Against wind, snow loads, and temperature changes

TNC 2.0 shows exceptional resilience

Passing IEC62938 non-uniform snow load

and IEC62782 dynamic load tests

TNC 2.0 ensures stable operation in extreme conditions

Even if microcracks occasionally occur in extreme scenarios

TNC 2.0 modules with 908 technology

will further reduce efficiency losses through innovative structural design

By comparison, we can see that

TNC 2.0 modules with 908 technology have a dense grid line arrangement

with a smaller grid line spacing

which can significantly reduce the power generation area affected by failures

Choosing TNC 2.0 modules with 908 technology

means choosing a more robust "anti-microcrack armor" for your PV power station

This means higher initial quality, lower transportation loss risks

and decades of stable power generation performance

allowing every ray of sunlight to be efficiently converted into tangible benefits

Planned and produced by: Module Marketing Division of PV Business Department, and the Administrative Department

Content support: PV Technology Department, Product Management Division of PV Business Department