Karnot iSTOR P89 High-Temp Thermal Battery
High-temperature thermal storage for industrial processes and commercial heating
The Karnot iSTOR P89 delivers industrial-grade high-temperature thermal storage using advanced Plentigrade P89 Phase Change Material. With charging temperatures up to 120°C and a discharge temperature of 83.5°C, it is purpose-built for demanding process heat, district heating, and high-temperature commercial applications where conventional thermal stores fall short.
Key Features & Advantages
Engineered for high-temperature industrial applications — the iSTOR P89 delivers powerful thermal storage with exceptional heat output in a compact, robust package.
Industrial-Grade Heat
Charges up to 120°C and discharges at 83.5°C, delivering the high-temperature output required for industrial processes and demanding commercial heating applications.
Dense Energy Storage
Packs 67 kWh of thermal storage into a compact footprint using advanced Plentigrade P89 Phase Change Material for maximum energy density.
Versatile Dual Circuits
Features two independent hydronic circuits (High Power and Low Power) that can be configured to suit any application and load requirement.
Robust & Reliable
Built to withstand demanding environments with a maximum working pressure of 16 bar, ensuring long-term reliability in industrial settings.
Technical Specifications
Comprehensive specifications for system design and installation planning.
Performance & Capacity
| Nominal Storage Capacity | 67 kWh228 kBTU |
| Standby Stored Energy Loss Rate | 5.83 kWh / 24h19.9 kBTU / 24h |
| Design Discharge Outlet Temperature | 83.5°C182.3°F |
| Charging Source Temperature | 95°C to 120°C203°F to 248°F |
Operational & Physical
| Max Flow Rate (High Power Circuit) | 50 L/min13.2 gal/min |
| Max Flow Rate (Low Power Circuit) | 40 L/min10.6 gal/min |
| Maximum Working Pressure | 1.6 MPa (16 bar) |
| Dimensions (W × D × H) | 1200 × 1000 × 1470 mm47″ × 39″ × 58″ |
| Weight | 1,553 kg3,424 lbs |
Additional Advantages
Beyond core performance, the iSTOR P89 delivers system-wide benefits that transform how you manage high-temperature thermal energy.
System Benefits
- Charges from multiple energy and heat sources
- Decouples heat sources from heating demands
- Offers demand side management and shifts heating loads to cheaper off-peak tariffs
- Modular and scalable — thermal batteries can be connected in series or in parallel to increase heat storage capacity
Lower Costs
A Karnot iSTOR P89 thermal battery is clean and fast to install. There's no need to increase the size of expansion vessels nor the volume of water treatment chemicals. Running costs are also low because mandatory annual maintenance and inspections are not required.
Note: As an innovative company committed to continuous improvement, our products are subject to change without prior notice. Always refer to the latest version of this document.
Ready to Optimise Your High-Temperature Thermal Storage?
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