PVT-E Thermoelectric Assembly

Introduction

Under the global transition toward carbon neutrality in the building sector, the efficient and integrated use of clean energy has become a central requirement. Traditional solar technologies follow a single-function model: photovoltaic modules generate electricity, while solar thermal collectors provide heat. This separation no longer matches the multi-dimensional energy demand of modern buildings, which require electricity, heating, cooling, and hot water simultaneously.

The PVT-E hybrid photovoltaic-thermal module was developed to respond to this challenge. By integrating photovoltaic and thermal technologies into a single energy conversion product, the PVT-E module enables simultaneous utilization of solar radiation for both electricity and heat. It provides a practical, efficient, and scalable solution for low-carbon building energy supply and represents an advanced approach to modern building energy transformation.

I. Core Product Positioning: A High-Efficiency Dual-Output Energy Converter

The PVT-E module is designed as a new-generation energy product capable of converting solar radiation into both usable electrical energy and thermal energy at the same time. Its core innovation lies in the coupling of a thermal energy harvesting component directly to the rear side of the photovoltaic module.

By carefully matching the operating temperature ranges and energy conversion characteristics of the photovoltaic and thermal subsystems, the module enables coordinated operation under dynamic outdoor conditions. This coordinated design avoids internal energy losses and improves the overall efficiency of solar utilization.

Compared with conventional photovoltaic modules, the PVT-E module increases the combined electrical and thermal energy output by approximately two to three times. It is suitable for applications such as building space heating and domestic hot water production, significantly reducing dependence on fossil fuels and supporting low-carbon operation of buildings.

II. Four Key Advantages: Comprehensive Enhancement of Building Energy Systems

1. Efficiency Advantage

The integrated design allows the PVT-E module to achieve a total solar energy utilization efficiency of up to 80%, which is significantly higher than that of standalone photovoltaic or thermal systems.

The module maintains photovoltaic cell temperature within an optimal range. For every 1°C reduction in operating temperature, electrical efficiency increases by approximately 0.3%–0.5%, ensuring stable and efficient power generation.

2. Space Advantage

By producing both electricity and heat from a single installation area, the PVT-E module maximizes energy output per unit surface area. Compared with conventional combined installations of PV panels and solar collectors, it reduces roof space requirements by approximately 50%, making it suitable for buildings with limited available installation space.

3. Environmental Advantage

The system operates without direct carbon emissions. It supplies renewable electricity and heat to buildings and industrial processes, replacing conventional fossil energy sources and supporting carbon reduction goals.

4. Economic Advantage

The dual-output configuration enables users to obtain both electrical and thermal benefits from a single investment. At the same time, temperature control reduces thermal stress on photovoltaic components, extending module lifespan and reducing long-term maintenance costs.

III. Core Technical Performance Indicators

• Through advanced thermal-electrical coupling technology, the module maintains surface temperature within the optimal range of 25–45°C, ensuring that total energy utilization exceeds 80%.

• Temperature regulation slows the aging of encapsulation and insulation materials, prevents hot-spot formation, and increases lifetime electricity generation by more than 16%.

• The module also adopts vacuum lamination and thermal curing bonding processes that eliminate micro-cracks, air bubbles, and delamination, ensuring long-term stability and reliability.

IV. Key Technological Innovations

1. High-Efficiency Dual Optimization Technology

By analyzing photovoltaic-thermal coupling mechanisms and applying transient models with PID-based control of working fluid parameters, the system achieves approximately 22.4% electrical efficiency and more than 35% thermal efficiency.

2. Spectral Selective Coating Technology

The module integrates multilayer selective coatings produced using PVD and CVD processes, enabling efficient utilization of a wide range of solar wavelengths and improving optical energy conversion.

3. High-Efficiency Thermal Coupling Technology

Optimized vacuum bonding, material matching, and heat spreader layout reduce interfacial thermal resistance and improve heat transfer efficiency while maintaining structural stability.

4. Low Thermal Loss Technology

Through the use of aerogel composite insulation, staggered insulation structures, selective coatings, and vacuum packaging, the module significantly reduces convective and radiative heat loss.

V. Why Choose Soletks Solar

Soletks Solar has established a comprehensive technology and manufacturing foundation in clean energy systems. The company holds more than 30 core patents covering selective absorber coatings, thermal-electrical coupling, and system integration, with most technologies already industrialized.

A 500 m² flat-plate clean energy testing platform equipped with spectral analysis instruments, IV testing systems, and thermal performance testing facilities ensures rigorous product validation.

Highly automated production lines with automation rates exceeding 85% guarantee consistent quality and reliable delivery.

Conclusion

With its integrated design, high efficiency, and reliable performance, the PVT-E hybrid photovoltaic-thermal module redefines the way buildings use solar energy. It provides a dual supply of electricity and heat, maximizes energy output from limited space, and supports the transition toward low-carbon, sustainable building energy systems.

Whether applied in new construction or in the retrofitting of existing buildings, the PVT-E module offers a stable, efficient, and economically viable pathway toward clean energy adoption.