Central Bank Mini (P58): industrial thermal energy storage
Compact PCM thermal storage for waste heat recovery, process heat and load shifting across commercial and industrial settings
Compact thermal storage, built for high performance
Central Bank Mini (P58) is a compact, next generation thermal battery engineered to store and deliver heat with exceptional efficiency and high thermal power using Sunamp’s patented Plentigrade® P58 phase change material. The Central Bank Mini (P58) can store heat from waste heat capture, boilers, and heat pumps at up to 80ºC and releases it at circa 53ºC, ideal for heating and low temperature hot water processes.
By separating when heat is generated or recovered from when it is used, Central Bank Mini helps bridge mismatches in timing and power between heat availability and demand.
Dimensions: Central Bank Mini has a compact footprint of just 1.2 m × 1.0 m × 1.47 m, making it up to 3x smaller than an equivalent hot water thermal store.
See how the thermal battery can integrate with different heat sources and serve a range of commercial and industrial thermal demands
Why Central Bank Mini
High capacity heat storage in a compact footprint
Inside each unit, Plentigrade® P58 stores up to 80 kWh of thermal energy, enabling sites to shift, recover and optimise heat like never before. The sealed, insulated cell and integrated heat exchanger deliver reliable output with ultra-low losses.
Unlock new value from heat sources
The Central Bank Mini (P58) enables a wide range of decarbonisation and cost saving strategies:
Waste heat recovery
Capture low grade heat (65–80ºC) from industrial or building processes to reuse, reducing primary fuel consumption.
Renewable intermittency solved
Store heat generated from surplus embedded solar PV or wind for use when needed.
Grid flexibility
Capture heat during electricity off peak times and deploy it during high demand periods to reduce energy costs.
Load shifting
Store heat from any or all of the heat sources to meet peak demand requirement on the system.
From available heat to useful heat
Central Bank Mini can integrate with different heat sources and serve a range of commercial and industrial thermal demands
Central Bank Mini can store heat from:
- Waste heat recovery systems
- Industrial process heat recovery
- Process cooling heat exchangers
- Chiller and refrigeration heat recovery
- Air compressors and air heat recovery
- Flue gas heat recovery
- Heat pumps
- Electric boilers
- Other boilers
- Solar thermal
- Geothermal systems
- Heat generated using surplus solar PV or wind electricity
Stored heat can support applications including:
- Industrial process heat
- Clean-in-place (CIP)
- Washdown
- Pre-heating
- Space heating
- Steam hotwell pre-heating
- Heat exchanger networks
- Integration with higher-temperature heat pump systems
Why Central Bank Mini for thermal energy storage
Space saving
Up to three times smaller than conventional buffer tanks or water stores, ideal for plant rooms where space is at a premium.
Compatible with multiple heat sources
Integrates seamlessly with boilers, heat pumps and waste heat recovery systems. Dual circuit design: High power and low power circuits can operate independently or together for tailored performance.
Ultra-low heat loss
Heat loss of around 3 kWh per 24 hours (ΔT 45ºC) dramatically improves energy efficiency and reduces operating costs.
Maintenance free operation
No mandatory annual inspections or servicing, unlike water based thermal stores subject to pressure vessel regulations. Only connected auxiliary equipment requires standard maintenance.
Central Bank Mini is modular and scalable
Connect units in series or parallel to build the exact storage capacity (including cascade systems) your site requires, ideal for multi building estates or industrial processes.
Decarbonisation and cost reduction
Cut emissions and fuel use
With exceptionally low heat losses and the ability to harness waste heat, Central Bank Mini (P58) helps reduce primary fuel consumption and supports compliance with decarbonisation targets.
Build energy resilience
Store surplus renewable energy, capture waste heat, and shift loads to off peak electricity periods, reducing energy bills and improving operational resilience across commercial and industrial sites.
See real-world impact: Central Bank Mini in waste heat recovery
In Kitakyushu City, Japan, IHI Corporation demonstrated waste heat recovery using Sunamp Central Bank Mini by capturing surplus heat from Shabondama Soap Co., Ltd and sending it through a 70-metre underground pipe to Hirota Chemical Industry Co. to warm chemical drums. IHI’s evaluation showed strong results, including around a 30% reduction in initial equipment costs versus pre-trial estimates and CO₂ payback in under one year.
See how Central Bank Mini compares with hot water buffer tanks
Read how narrow temperature deltas can make conventional hot water buffer tanks larger, increase surface area and raise standing heat losses. The article also explains how PCM thermal storage uses latent heat to store useful energy in a more compact form, making it a strong fit for heat recovery, process hot water, washdown, CIP and other industrial heating applications.
Waste heat recovery guide using Central Bank Mini
Click here to download our waste heat recovery guide and explore how PCM thermal storage can help industrial specifiers and MEPs capture, store and reuse more useful heat.