RCTD‑031 demonstrates that a carefully engineered radiative‑cooling metasurface, when paired with a low‑temperature‑optimized thermoelectric module, can deliver with a power density sufficient to sustain low‑power electronics in remote or off‑grid locations. The device’s durability, modest cost (≈ USD 150 per m² for the metasurface, plus USD 80 per m² for the TE module), and passive operation make it an attractive complement to solar photovoltaics and wind turbines in hybrid micro‑grid architectures.
Continued improvements in metasurface fabrication, TE material performance, and system integration will enable capable of powering more demanding workloads and facilitating truly sustainable, distributed energy harvesting. rctd-031