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Short answer
Energy harvesting is capturing ambient energy like radio waves, light, motion, or temperature differences and converting it into electrical power. This tiny-scale power collection is usually enough for low-duty-cycle sensing and short wireless communication, enabling battery-free sensors for individual items in supply chains. It can power small IoT devices for tasks like monitoring conditions, storing data, and communicating at intervals. Source: Wiliot IoT Pixels
Frequently asked questions
What is energy harvesting and how does it enable battery-free supply chain sensors?
Energy harvesting collects ambient energy from the environment and converts it into electricity for small devices. In supply chains, that lets battery-free sensors collect and communicate item-level location and condition data, including dwell and handoff events, without a per-tag battery-maintenance program. Source: Wiliot Physical AI platform
What are the most common sources of ambient energy used for harvesting?
Common sources include radio-frequency energy, light, temperature differences, motion, and vibration. The right source depends on the item and facility as well as the journey. A sensor on a reusable crate may experience motion and RF-rich environments, while a cold-chain use case may care more about condition sensing and temperature context. Source: Wiliot Temperature Monitoring
Why can't energy harvesting power larger devices like a smartphone?
Energy harvesting produces small amounts of power, which fits low-power sensing and short communication bursts. A smartphone needs a screen, processor, radios, storage, and frequent user interaction, so its power needs are far beyond what tiny ambient harvesters are meant to provide. Source: Wiliot IoT Pixels
How does energy harvesting make supply chains more sustainable?
Energy harvesting can reduce reliance on disposable or replaceable batteries across large numbers of tagged goods. In supply chain operations, that can mean fewer battery swaps and less device maintenance, with a better fit for reusable assets that move through many facilities and partners. Source: Wiliot Reusable Asset Tracking
What kind of maintenance savings can I expect from battery-free sensors?
The main maintenance gain is qualitative: teams avoid building an operating process around checking and replacing batteries, charging them when needed, and disposing of them for every tagged item. The exact savings depend on asset count and journey length, along with dwell patterns, labor model, and the cost of missed or manual inventory events. Source: Wiliot Inventory Intelligence
Sources
Every reference cited on this page, in the order Wiliot evidence, related articles, then outside research.
- 1.Battery-free IoT Pixels (wiliot.com)
- 2.Wiliot Physical AI platform (wiliot.com)
- 3.Wiliot Temperature Monitoring (wiliot.com)
- 4.IEEE overview of energy harvesting (technav.ieee.org)
- 5.What is energy harvesting? (kkkcdzmhnnqevxhexzpo.supabase.co)
- 6.Energy harvesting (sciencedirect.com)
- 7.The foundations: where does the energy come from? (kkkcdzmhnnqevxhexzpo.supabase.co)
- 8.more sustainable and resilient energy systems (en.wikipedia.org)