As one of the influential exhibitions in the photovoltaic industry, the International Solar Photovoltaic and Smart Energy Exhibition (SNEC) has always been regarded as the industry's "barometer" and "wind vane". This SNEC exhibition is a one-time event, with an exhibition area of over 380000 square meters, gathering more than 3600 companies from around the world to participate. Even though the industry is going through a new cycle, the exhibition site is still crowded and bustling every day. Major leading enterprises have achieved cost reduction and efficiency improvement, product upgrading, and opened up a new industrial pattern driven by new energy sources such as photovoltaics and energy storage through technological innovation.

The complete replacement of p-type with n-type is unstoppable

Improving battery conversion efficiency and reducing the cost per kilowatt hour are eternal themes in the photovoltaic industry. As the conversion efficiency of p-type batteries gradually approaches the ceiling, the n-type technology route stands out and becomes the "new favorite" of the industry.

The reporter felt on site that the presence of p-type products was rarely seen at this exhibition, and n-type products became the absolute mainstream. It is unstoppable for n-type products to completely replace p-type products.

At present, mainstream n-type batteries include TOPCon, heterojunction (HJT), BC technology, etc. Currently, TOPCon has become the flagship product of most enterprises due to its scale advantage. However, at this year's SNEC, TOPCon components showed little difference in conversion efficiency, wattage, or pattern, with component conversion efficiency mostly concentrated between 22% and 23%; On the contrary, new technologies such as heterojunction (HJT) and BC are more eye-catching, and the mass production efficiency of some products is even "rolled up" to 25%.

Longi Green Energy Hi-MO9 Component Products

BC technology company Longi Green Energy brings Hi-MO9 component products. It is reported that the product is based on Tairui silicon wafers and uses HPBC 2.0 battery technology independently developed by Longi. In the standard size of 2382mm × 1134mm × 30mm, the maximum component power is 660W, which is about 30W higher than TOPCon products, and the component rate can reach 24.43%; The first year's attenuation is 1%, and the following year's attenuation is only 0.35%. It is expected to enter mass production in the fourth quarter of this year.

The theoretical limit conversion efficiency of HPBC cells is as high as 29.1%, higher than TOPCon and HJT's 28.7% and 28.5%, and close to the theoretical efficiency limit of 29.43% for crystalline silicon photovoltaic cells. ”Tang Yi, Senior Manager of Longji Green Energy Product Solutions Department, told China Electronics News reporters that in addition, BC batteries are a platform based technology that has the ability to stack with excellent battery technologies. They can be combined with TOPCon, HJT, and perovskite technologies to break through the efficiency bottleneck of a single technology route. Longi Green Energy believes that BC technology will become mainstream within 5 years.

Another company that promotes BC technology, Aixu Corporation, has released the "full screen" ABC module and announced that its maximum power reaches 700W, with a conversion efficiency exceeding 25%, making it the most mass-produced and delivered photovoltaic module in the world.

The absence of grid lines on the front of the battery is one of the advantages of the two products mentioned above. In the past, there were gaps left between the battery cells, but now we have eliminated these gaps through precise stacking and welding techniques. This means that the area occupied by the battery cells in the module increases, and the light receiving area of the module also becomes more. If the battery cells occupy nearly 100% of the module area, it seems that the entire 'screen' of the module can generate electricity, "said the person in charge of Aixu Co., Ltd. to reporters.

GCL Optoelectronics Large scale Perovskite Module Series Products

Heterojunction (HJT) and perovskite component products also perform well. Dongfang Risheng announced that its newly developed heterojunction (HJT) component, the Fuxi series, has a maximum power of 767.38Wp and a component conversion rate of 24.70%; Longi Green Energy announced at the exhibition that its crystalline silicon perovskite solar cells have once again broken the world record for the efficiency of crystalline silicon perovskite solar cells, with a photoelectric conversion efficiency of up to 34.6%; The perovskite single junction module exhibited by GCL Optoelectronics achieved a new breakthrough of 19.04% conversion rate at a size of 1m × 2m

In addition, the power of photovoltaic modules is also increasing, with 700W becoming a standard configuration. The highest power of the Eastern Sunrise Heterojunction (HJT) Fuxi series components reached 767.38W; Trina Solar showcased its n-type 720W series components; Tongwei Co., Ltd., Xiexin Integration, and other companies have exhibited products worth over 700W.

Light storage fusion is becoming increasingly evident

Compared with traditional energy sources, renewable energy sources such as photovoltaics and wind power have problems such as intermittency and volatility. Under the requirement of grid stability, deep integration of photovoltaic and energy storage has become an inevitable trend.

At this year's SNEC, energy storage technology and products have become another "protagonist". It is worth mentioning that SNEC is mainly a photovoltaic exhibition, but in recent years, more and more energy storage manufacturers have participated, including not only battery companies and vertical energy storage manufacturers, but also solar energy companies such as Trina Solar, JinkoSolar, and Sunac, which are also moving towards the path of "photovoltaic storage integration".

JinkoSolar brings multiple newly upgraded optical storage solutions. Among them, the Blue Whale SunTera 5 MWh source grid side energy storage system is designed with five levels of protection from battery cells to the system, effectively preventing thermal spread; With the cluster level management scheme, the cycle charge discharge efficiency (RTE) has been improved by over 2%; Intelligent liquid cooling design can control the temperature difference of Pack within 2 ℃, thereby reducing system auxiliary power consumption by 20%. In addition, JinkoSolar has launched the Dolphin SunGiga 261 liquid cooled integrated cabinet, with a system battery power of 125kW, which can provide users with a 1000V energy storage system solution.

Kehua Shuneng Zero Carbon Park Solution

Huawei Digital Energy has released an intelligent string type grid connected energy storage platform from chip to grid. The platform includes an intelligent string type grid connected energy storage system, an intelligent string type energy storage controller, etc. It is compatible with large capacity lithium iron phosphate batteries of different specifications, supports full rate scenario applications, and achieves better electricity costs throughout the lifecycle. At the same time, an intelligent photovoltaic wind storage generator solution was also released, which improves the power grid's ability to absorb new energy from three aspects: "reconstructing voltage stability, reconstructing frequency stability, and reconstructing power angle stability". Compared with traditional energy storage solutions, the new energy access capacity can be increased by 40%.

Kehua ShuNeng demonstrated a smart light storage and charging full scenario solution. For large-scale ground photovoltaic power plants, we bring a new generation of 5MW centralized photovoltaic inverter boost integrated machines and 320kW string inverters, which can provide better value services for projects in various scenarios such as desert and water surface; For household storage, we bring the S3 iStorag E3 household light storage integrated system, which supports a wide working voltage range of 150V~1100V, providing sufficient power support for households. It can not only ensure the normal operation of lighting, various electrical appliances, but also be used for charging new energy vehicle batteries and adapting to weak grid environments in rural areas.

The revolutionary breakthrough window period for optical storage technology is approaching, and the optical storage industry will continue to reshape a new pattern in the face of changes, "Cui Jian, President of Xiamen Kehua Digital Energy Technology Co., Ltd., told China Electronics News reporters. However, the power system is a highly complex and critical infrastructure, and existing standards are not enough to cover all nodes, and these innovations also face uncertainty. Despite the rapid evolution of technology, its underlying logic revolves around the development trend of high reliability, large capacity, high security, and long lifespan.

Tianhe Solar, TBEA, CATL, BYD Energy Storage, Xinwangda, Lanjun New Energy, Haichen Energy Storage and other companies all appeared at this year's SNEC exhibition, showcasing their self-developed battery cells and energy storage system products for multiple scenarios such as large-scale storage, industrial and commercial, and household use.

The accelerated integration of artificial intelligence technology and the optical storage industry

Currently, artificial intelligence technology (AI) is changing the way production is carried out. The emergence of generative artificial intelligence technology has also provided new possibilities for optimizing and upgrading the new energy industry. At this exhibition, various optical storage enterprises actively embrace AI technology and deepen the promotion of intelligence, which has become the trend.

Aishiwei has recently released its AI energy management platform, "Aishijia". It is reported that this is the application of the Tongyi Big Model in the photovoltaic industry. Compared with traditional energy management systems, "Love Butler" can use energy management algorithms to more intelligently predict the optimal charging and discharging timing of energy storage batteries and other equipment, further reducing electricity costs.

Sunshine Power announced at the exhibition that it has successfully completed a large-scale combustion test demonstration of an energy storage system. With the application of large capacity and long-term energy storage, the current and voltage levels on the DC side continue to rise, and the safety risks caused by arcing, also known as' ignition ', have increased. However, due to the complexity of the energy storage system control logic and the bottleneck of data transmission efficiency, the safety technology of DC arcing is still blank. "The person in charge of Sunshine Power introduced to the reporter that with the help of core technologies such as PCS arcing recognition dynamic algorithm, high-precision sensing, and risk data monitoring, Sunshine Power has built a technical platform that integrates arcing risk prediction, induction, and suppression, achieving source arc prevention, accurate arc recognition, and rapid arc extinguishing. Relying on the improvement of computing power and self-learning technology of artificial intelligence, it can adapt to various complex scenarios, achieve zero false positives and false negatives, 100% accurate arc recognition, and quickly extinguish arcs in 0.2 seconds.

Tianhe Solar Energy Storage Product - ELementa King Kong 2

Trina SolarshoufaThe new generation AI inspired liquid cooled industrial and commercial storage system Potentia Blue Ocean 2 has been developed. It is reported that the Potentia Blue Ocean 2 is equipped withThe excellent+vehicle grade 314Ah Tianhe core adopts pre replenishment lithium slow-release technology to achieve zero attenuation in the first year cycle, innovates the power flow algorithm, strengthens load forecasting, and can effectively improve energy conversion efficiency by 1.5%. In addition, Potentia Blue Ocean 2 covers the entire digital cloud platform, achieving 10 second one click self check and security adjustment. Based on a multi port shared operation and maintenance interface, it constructs an APP Web Cloud management cycle and implements OTA remote upgrade and control operations.

In the field of energy storage and energy, intelligent and AI big models have huge application space. ”Yang Shu, Vice President of Jiangsu Weiheng Intelligent Technology Co., Ltd., pointed out that the distributed access of uncertain new energy sources such as photovoltaics and wind power, as well as the integration of large loads and high-power composites that exceed conventional standards, have brought great uncertainty to both the grid side and the load side. Faced with these uncertain factors, how to accurately predict and configure strategies, balance source network load and storage, and recommend the best use of energy storage and load to achieve the optimal level of system revenue have become important challenges that the industry needs to face. And intelligent technology will solve related problems.

Sun Wei, Vice President of Trina Solar and President of Trina Solar Energy Storage, introduced that in the manufacturing end, the key production processes and more than 4000 quality control points of Trina Solar Energy Storage Chuzhou production base have completed full coverage of intelligent MES (Manufacturing Execution System), which can collect and analyze data generated in the production process, achieve self identification, self feedback, self adjustment, and self-learning. In the future, with the increasing interaction in our self built production capacity, we will accumulate more and more data. We will further utilize information technology such as mathematical models to optimize the production line, thereby reducing costs, ensuring product quality, and further moving towards intelligent manufacturing, "said Sun Wei.