High-temperature energy harvesting exposes the hidden cost of batteries across Industrial Internet of Things (IIoT) deployments, especially in environments where heat and access constraints shorten battery life and raise maintenance risk. Fit-and-forget architectures matter in hazardous and remote locations. Battery replacement introduces downtime and unpredictable operating costs that scale with fleet size, while thermal extremes further reduce cell reliability.
Energy harvesting and self-powered sensors emerge as engineering-driven solutions that align with long-term system availability and life-cycle performance. Battery-less IIoT designs become a practical response to operational constraints rather than a sustainability narrative.