Ligna Energy’s S-Power supercapacitor has been selected as the energy storage component in Signostium‘s next-generation digital stairwell sign – a battery-free, self-powered display system designed for multi-tenant residential buildings.
The product
Signostium addresses a common and costly challenge in property management: keeping residents informed. Traditional paper signs require manual updates and regular site visits, adding unnecessary labour and cost for real estate owners. Their digital stairwell sign replaces that entirely. It can be updated remotely via LoRa connectivity, displays information on an ultra-low-power e-paper screen, and runs entirely on ambient light harvested through Epishine‘s organic indoor PV cells, with no batteries and no maintenance.
Why the S-Power
For Signostium, eliminating batteries was a core design requirement to reduce maintenance costs for their customers. But beyond that, they needed an energy storage component that could match the sustainability ambition of the product itself. S-Power supercapacitors are bio-based, contain no heavy metals, and come with a verified Environmental Product Declaration (EPD), offering a level of material transparency that remains rare in the energy storage industry. For a product positioning itself as a sustainable infrastructure solution, the choice of component matters.
What’s next
This fall, Signostium will be running a pilot of their next-generation product with real estate customers. The pilot represents a significant step toward commercial deployment and further validates S-Power as a component of choice in the growing battery-free IoT market.
