SPRING4 425 TOPCon F

Bottom 1% of the TOPCon 400-450 W segment, against a median of 51.4. Ranked 13,828th in the whole database.

Bottom 10% of the TOPCon 400-450 W segment, against a median of -0.290.

The SPRING4 TOPCon F integrates both electricity generation (425 Wp) and thermal energy output (940 W thermal power at STC) in a single module, achieving a seasonal system COP of 8.5 when paired with a heat pump. Compared to a conventional PV installation, the system delivers 6–8× more useful energy from the same roof area — a performance level unmatched by any direct peer comparable (Hyundai, Trina, Tongwei).

The module achieves 21.8% efficiency, outperforming direct competitors: Hyundai DG G12 PERC Shingled (21.4%), Tongwei TERRA 5K (21.4%), and Trina Vertex S (21.3%). The TOPCon half-cut cell technology also delivers a low temperature coefficient of -0.31 %/°C, translating into meaningfully higher real-world energy yield in Central European climates compared to PERC-based modules.

The manufacturer guarantees a minimum of 87.4% of nominal power output after 30 years of operation. Furthermore, rear-side liquid cooling of the heat exchanger lowers cell operating temperature, which — according to DualSun data — increases electrical yield by approximately 6% relative to identical cells in a standard PV module.

The panel is designed and manufactured at DualSun's facility in France, eliminating the supply chain risks associated with long-distance sourcing from Asia, facilitating access to technical support across the European market, and meeting the eligibility requirements of subsidy programs that favor EU-based manufacturers.

The finned heat exchanger, with a 6.4 m² heat transfer surface area, is fabricated from a fully recyclable aluminum alloy, in compliance with the EU Circular Economy Action Plan. Aluminum supports an unlimited number of recycling cycles without loss of material properties — an increasingly important consideration given tightening environmental requirements for PV installations.

The module weighs 36.3 kg with dimensions of 1722×1134×71 mm, whereas comparable 425 Wp PV modules (Trina Vertex S, Tongwei TERRA 5K) typically weigh 22–24 kg. Each module adds approximately 13 kg of extra dead load to the roof structure, necessitating a structural load-bearing assessment for every installation and potentially ruling out deployment on lighter timber-framed roofs without additional reinforcement.

The Finned variant requires a dedicated glycol loop, a brine-to-water heat pump, and certified installers with proven PVT system experience. The total installed cost of a PVT + heat pump system is substantially higher than that of a standard PV installation, and the pool of contractors with the necessary competencies in Poland remains limited compared to installers of conventional PV panels.

DualSun provides a 10-year product warranty, while Trina Solar Vertex S carries a 15-year warranty and the Hyundai DG G12 a 12-year warranty. The shorter coverage period for manufacturing defects is particularly noteworthy given the module's dual function (electrical and thermal) and the presence of the heat exchanger as an additional component susceptible to failure.