SP Samhwa said on the 30th that it obtained a patent related to a heat-dissipating paint composition applicable to glass-steel structure building-integrated photovoltaics (BIPV) modules.
The patent was pursued by SP Samhwa to secure technological competitiveness in response to the growing BIPV market driven by the government’s carbon-neutral policy and the expansion of mandatory zero energy building (ZEB) standards. The patented technology effectively lowers heat accumulated on the back of steel plates, improving power generation efficiency of photovoltaic modules as temperatures rise.
BIPV modules combine building exterior materials with photovoltaic power generation functions, and because BIPV modules are attached directly to building facades, they tend to accumulate more heat than general ground-mounted photovoltaic modules. In particular, the G2S (Glass-to-Steel) structure made of glass and steel has higher structural stability than the conventional glass-backsheet structure, but has the limitation that heat on the back of the steel plate does not dissipate well, making it easy for the module temperature to rise.
It is known that for photovoltaic modules, power generation efficiency decreases by about 3% for every 10°C increase in surface temperature, so power loss becomes pronounced in hot summer conditions.
The heat-dissipating paint using the patented technology releases heat accumulated in BIPV modules in three stages: “thermal conduction,” which rapidly spreads heat delivered from the steel plate throughout the coating film; “thermal radiation,” which emits heat from the coating surface as infrared; and “convection,” which performs heat exchange with the surrounding air.
SP Samhwa expects that, if commercialized, this technology will minimize the drop in power generation efficiency due to temperature rise in G2S-structure BIPV modules and slow the rate of module degradation, contributing to longer product lifespans. Along with obtaining the patent, SP Samhwa has completed lab-scale performance verification and plans to define the commercialization timeline after demonstration testing.
An SP Samhwa official said, “This patent is a new technology that can improve the drop in power generation efficiency caused by rising temperatures, a known issue for BIPV modules,” adding, “We will expedite commercialization through demonstration testing and expand application to a variety of BIPV product lines.”

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