Sfera Labs Releases Supercapacitor UPS Expansion Board for Raspberry Pi Server
The new UPS expansion board delivers supercapacitor-based backup power to the Strato Pi Max industrial server for uninterrupted operation, ensuring clean shutdowns and uncorrupted data.
The reliability of industrial control and monitoring systems is critically dependent on a stable power supply. Momentary power fluctuations, brownouts, and brief outages can lead to system resets, data corruption, and operational downtime. To address this challenge, Sfera Labs has released a new uninterruptible power supply (UPS) expansion board for its Strato Pi Max server, shifting away from conventional battery-based solutions in favor of high-capacity supercapacitors. This design choice offers a compelling alternative for applications where short-duration power backup is the primary requirement.

Sfera Labs’ SuperCaps UPS expansion board features directly integrated supercapacitors. Image used courtesy of Sfera Labs
SuperCaps UPS X2-Series Expansion Board
Sfera Labs’ new SuperCaps UPS X2-series expansion board integrates a bank of supercapacitors directly onto the PCB, providing a compact, low-maintenance solution. Unlike chemical batteries, which degrade over charge-discharge cycles and are sensitive to temperature extremes, supercapacitors offer a much longer operational lifespan, typically rated for hundreds of thousands of cycles. This makes them well-suited for environments where power instability is frequent but intermittent, such as on a factory floor or in a utility substation. The rapid charge and discharge capabilities of supercapacitors ensure they are always ready to provide power, and their robust temperature performance allows for reliable operation across a wider range of conditions.
The Strato Pi Max Ecosystem
The SuperCaps UPS X2-series expansion board is built to ensure uninterrupted power to Sfera Labs’ Strato Pi Max server. When the server’s main power source is interrupted, the expansion board seamlessly transitions to providing backup power from its supercapacitor bank. The board is designed to sustain the Strato Pi Max for a sufficient duration to perform a controlled and clean system shutdown. This is a critical function, as a sudden power loss can corrupt file systems and compromise the integrity of mission-critical data.
The expansion board can be configured to automatically initiate the shutdown process, saving data and closing applications in an orderly fashion before the remaining charge in the supercapacitors is depleted. In addition, the board can be programmed to send real-time alerts or signals to other control systems, notifying operators of the power event and the status of the backup.

The SuperCaps UPS X2-series expansion board is custom-built to keep Sfera Labs’ Strato Pi Max server continuously operating. Image used courtesy of Sfera Labs
Supercapacitor-Based Backup Power
The technical specifications and on-board design make the Strato Pi Max expansion board a pragmatic solution for several key industrial applications. Its compact form factor simplifies installation, eliminating the need for bulky external battery packs and associated wiring. The long service life of the supercapacitors reduces the maintenance burden, as there is no need to periodically inspect or replace aging batteries. This is particularly valuable in remote or hard-to-access installations where routine maintenance is difficult or costly.
Uninterrupted Power, Continuous Operation
In summary, Sfera Labs’ SuperCaps UPS X2-series expansion board represents a robust, purpose-built power backup solution for the company’s Strato Pi Max industrial server. By leveraging supercapacitor technology, the expansion board provides a reliable, low-maintenance source of temporary power to safeguard against the effects of short-term power interruptions.
The SuperCaps UPS X2-series expansion board’s measured and durable design addresses the specific needs of designers seeking a reliable solution for maintaining system uptime and data integrity in demanding environments. Key applications for this type of system include industrial automation, where the expansion board can protect control processes and data logging from power glitches, and smart grid infrastructure, where it can ensure the continuous operation of monitoring and communication nodes in the event of a utility disturbance.