SVL News
PhaseStor: Thermal Energy Storage for Heating/Cooling, Load Shifting & Equipment Size Reduction
In today’s engaging 45-minute Coffee Break webinar, we had the distinct pleasure of hosting Pete Nowicki from PhaseStor, a pioneering company in the realm of innovative thermal energy storage solutions. Pete’s insightful presentation delved deep into the advanced technologies offered by PhaseStor, highlighting their substantial benefits and transformative potential for energy efficiency. A highlight of the webinar was Pete’s live demonstration of the eStor® (domestic hot water) system. He walked the audience through the setup and operation, showcasing the system’s efficiency and effectiveness in real-time. This demonstration illustrated how the eStor® system can generate immediate savings and shield against rising energy costs, emphasizing the practical benefits of PhaseStor’s technology. This 140CC tank has a capacity of 125 latent ton-hours, with dimensions of eight feet in width, seven feet in height, and approximately eight feet in length. In comparison, the 100 ton-hour eSTOR modular tank measures six feet by six feet by four feet. The modular tanks can be stacked up to three high, reaching a total height of around fifteen feet when the necessary braces and bracketing are added.
PhaseStor’s Game-Changing Technologies

Pete highlighted three core technologies that PhaseStor offers, each designed to optimize energy usage and reduce costs significantly.
- eSTOR™ – Domestic Hot Water Storage Unit: The eSTOR unit is a groundbreaking solution for providing hot water in residential and commercial buildings. This system is compatible with air-water heat pumps, boilers, and even solar thermal systems. One of the standout features of the eSTOR is its use of bio-based phase change materials (PCMs). Unlike traditional salt-based PCMs, bio-based PCMs maintain their latent heat capacity over thousands of freeze-thaw cycles, ensuring long-term reliability and efficiency.During the webinar, Pete showcased the eSTOR’s efficiency, comparing it to traditional hot water heaters. eSTOR uses about half the electricity to produce over 100 gallons of hot water daily, thanks to its superior thermal conductivity and the latent capacity of its PCMs. This unit is not only highly efficient but also certified for the European market and soon to be UL certified in the US and Canada.
- IceStor®: Ideal for applications with large thermal loads, such as schools, hospitals, and corporate buildings, the I-Store technology has been around since the 1970s. Acquired from Phase Change Energy Solutions, the IceStor tanks offer significant advantages over competitors like Calmac, including greater storage capacity per square foot and lower glycol usage.Pete detailed a successful implementation at the Chicago Field Museum, where the IceStor system has helped save over $2 million in HVAC electricity costs over the next decade. This system, comprising 24 tanks with a latent capacity of 500 ton-hours each, demonstrates the long-term cost savings and durability of PhaseStor’s solutions.
- eSTOR™ Mod – Modular Tanks: Designed for both heating and cooling applications, the eSTOR modular tanks offer flexibility and efficiency. These tanks can be tuned to specific temperatures, making them suitable for a wide range of applications from data centers to apartments to hotels. The modular design allows for easy installation and scalability, with tank sizes ranging from 25 to 250 ton-hours.One notable project involved installing these tanks at a hotel in San Francisco, resulting in $12,000 monthly savings. This system effectively reduced peak kWh costs by shifting the load to off-peak hours, highlighting the significant financial benefits of using PhaseStor’s technology.
Inflation Reduction Act and Energy Efficiency
A key topic of discussion was the Inflation Reduction Act, which has made thermal energy storage even more appealing to end users. The act includes provisions for standalone energy storage, offering investment tax credits ranging from 6% to 30%. This makes PhaseStor’s solutions not only environmentally friendly but also financially attractive.
The Future of Energy Storage
Pete emphasized that PhaseStor’s technology acts as both a vitamin and a painkiller for end users. It reduces operating costs, prolongs equipment life, and offers substantial energy savings. With the added benefits of government incentives, PhaseStor’s solutions are poised to become integral components of sustainable building designs.
Conclusion
As we strive for a future with reduced carbon emissions and more efficient energy usage, technologies like those offered by PhaseStor are essential. The insights during the webinar underscored the importance of innovative thermal energy storage solutions in achieving these goals. If you’re looking to optimize your energy usage and take advantage of the latest advancements in TES technology, PhaseStor is the partner you need.
If you want to learn more about the latest technologies in HVAC, register for our next Coffee Break webinar. Reach out to your SVL Sales Engineer for an invite to our future sessions.




