BTE PVT-E 580W Hybrid Solar Panel | Laminated Full-Spectrum PVT Collector

Driven by the global energy transition and the "dual carbon" goals, how to obtain more clean energy within the limited building rooftop space has become a core issue in the field of new energy. BTE Solar has been deeply engaged in the field of solar thermal utilization for over 15 years. In 2025, at the Intersolar Europe exhibition, it launched the PVT-E series of photovoltaic-thermal integrated products - the PVT-E "thermoelectric twin system". This product integrates photovoltaic power generation and solar thermal collection into a single module, achieving "double use of one panel, same heat and electricity output", providing an innovative solution for global building energy conservation and industrial heat utilization. 

I. Product Overview: 580W electrical power + 1180W thermal power, dual-output on a single board

The BTE Solar PVT-E hybrid collector adopts a standardized size of 2279×1134×37mm. Each panel occupies only 2.6 square meters of space, yet it boasts an astonishing energy output capacity. The product is equipped with 144 N-type TOPCon half-cell batteries, with a maximum power output of 580W and a photovoltaic conversion efficiency of up to 22.44%. At the same time, the lower heat collection system can reach a peak heat power of 1180W, and can simultaneously produce about 60℃ hot water. This means that the energy output of one PVT-E panel is equivalent to the combined production capacity of traditional photovoltaic panels and flat collectors, and the overall utilization rate of solar energy per unit area has increased to over 80%. 

II. Laminated core enables full PV‑thermal synergy

The technical breakthrough of the PVT-E hybrid collector lies in the advanced laminated manufacturing process. 

At the manufacturing stage, PVT-E will wire-bond the N-type TOPCon photovoltaic cells, then stack them together with high thermal conductivity insulating film and copper-aluminum heat-absorbing plate to form a "sandwich" structure. Subsequently, it will be combined with ultra-clear tempered glass and enter a vacuum laminating machine for one-time molding. This lamination process achieves a seamless integration of the photovoltaic layer and the heat collection layer - the tempered glass cover plate, EVA film, high-efficiency photovoltaic cell, heat-absorbing aluminum plate, copper tube heat exchange channel, and TPT insulation layer are precisely laminated from top to bottom. 

The core value of laminating technology is reflected in three aspects: 

1. First, the thermal contact resistance is eliminated, resulting in an increase in heat transfer efficiency by over 40%. Through vacuum laminated bonding, a nearly zero-gap, closely-fitting connection is formed between the photovoltaic cell layer and the heat absorption plate, significantly reducing the interface thermal resistance. The residual heat generated by the photovoltaic cell during power generation is efficiently conducted to the copper tube channels on the lower layer, and is removed and utilized by the internal circulating propylene glycol anti-freezing heat transfer fluid. 

2. Second, actively cooling the photovoltaic cells can increase the power generation efficiency by 8% to 15%. For crystalline silicon photovoltaic cells, for every 1℃ increase in temperature, the power generation efficiency decreases by 0.4% to 0.5%. The laminated structure of PVT-E enables continuous heat dissipation, resulting in a surface temperature of the component being 8% to 15% lower than that of traditional photovoltaic systems. This not only increases the power generation efficiency by 8% to 15%, but also significantly extends the service life of the components. 

3. Thirdly, achieve full utilization of solar spectrum. In the solar spectrum, approximately 40% of the energy (especially the infrared part) cannot be utilized by photovoltaic cells. PVT-E, through laminated integrated photothermal components, converts this previously "wasted" infrared energy into thermal energy, thus achieving full utilization of solar radiation spectrum. 

III. Technical Specifications and Quality Assurance 

The operating temperature range of PVT-E covers -40°C to +85°C, enabling it to adapt to various climatic conditions ranging from the cold of Northern Europe to the heat of the Middle East. The heat collection system features a full copper tube plate heat exchange structure, filled with 1.2 liters of propylene glycol anti-freeze thermal fluid, with a working pressure of 0.6 MPa (6 bar). The product adopts an indirect heat exchange design, with the medium completely isolated from domestic water, ensuring no scaling or leakage. 

BTE Solar products have obtained international authoritative certifications such as CE, Solar Keymark, and ISO 9001, and are exported to over 40 countries and regions worldwide. The company has a modern production base of 53,000 square meters, with 16% of its employees being R&D personnel, and 50% of them having over 20 years of industry experience. 

IV. Application Scenarios: From Zero-Carbon Residences to Full Coverage of Industrial Parks 

After the PVT-E "thermoelectric twin system" is deeply coupled with the heat pump, it can be widely applied in various scenarios to achieve "electricity - heat - cold" triple supply: 

1. Zero-carbon residences and high-end villas: Integrated with air-source or water-source heat pumps to form a PVT + heat pump system, meeting the entire home's needs for electricity, heating, and hot water. 

2. Commercial buildings and hotels: Provide both electricity and hot water, significantly reducing the energy consumption of building operations 

3. Public swimming pool and sports facilities: Meeting the constant temperature heating requirements for the pool water 

4. Industrial parks and agricultural greenhouses: Provide clean thermal energy for processes such as heating, heating, and drying. 

5. Regional Heating and Seasonal Heat Storage: Building a Nearly Zero-Carbon Energy System 

Compared with traditional photovoltaic systems that only generate electricity and traditional solar thermal systems that only produce heat, PVT-E achieves dual output of electricity and heat on the same panel, doubling the energy output per unit area. For commercial buildings and industrial parks with limited roof space, this is the optimal solution for maximizing the utilization of solar energy resources. 

Looking forward to the future 

BTE Solar will continue to focus on the integrated photovoltaic and thermal technology, driven by the innovation of laminating process, and continuously enhance the performance and reliability of the PVT-E series products. From high-end residences in Europe to industrial parks in Asia-Pacific, BTE Solar's PVT-E hybrid collectors are demonstrating outstanding "one panel for dual energy" performance, contributing to the green energy transformation in the global construction and industrial sectors. 

Regarding BTE Solar: BTE Solar was established in 2009 and its headquarters is located in Dezhou, Shandong Province, China. It is a technology-based enterprise specializing in the research, production and sales of solar thermal utilization systems. The company has over 15 years of industry experience and in 2022, its production of flat plate solar collectors ranked second globally. Its core products include flat plate collectors, vacuum tube collectors, PVT photovoltaic-thermal integrated products, etc. It has obtained international certifications such as CE, Solar Keymark, and ISO 9001, and exports to over 40 countries and regions worldwide. BTE Solar adheres to the development philosophy of "gratitude, integrity, learning, and innovation", and is committed to providing high-quality solar comprehensive utilization solutions for global customers.