Cool Storage Systems with Phase Change Materials
Equaphase PCM thermal storage cuts peak cooling demand charges by up to 90% — retrofitting into your existing chilled water or packaged DX system. No new chillers. No disruption.
Inside the storage tank. PCM is filled into HDPE containers, hermetically and permanently sealed, then placed inside the tank. Chilled water from the existing building loop flows between the containers — freezing or melting the PCM without ever mixing with it.
Charge at Night. Store at No Cost. Cool All Day.
Our eutectic phase change materials shift your cooling load to cheap off-peak hours — eliminating expensive daytime chiller operation entirely.
Charge
The chiller or cooling tower runs at night when electricity rates are lowest, freezing the PCM modules stored in your tank.
Store
The frozen PCM holds its thermal energy — no electricity required to maintain the stored cooling capacity.
Discharge
As the PCM melts, it cools your facility through existing chilled water infrastructure — eliminating peak-hour chiller operation.
Lower Cooling Load Profiles
Three scenarios — same building, same cooling load, same summer day. With Equaphase and cooling tower charging, electricity for cooling drops by up to 81%.
Four Systems. Every Application.
Equaphase PCM cool storage systems can be sized as full-storage systems handling 100% of the cooling load, or as partial storage systems — integrated into new or existing chilled water and packaged DX systems.
Four Markets. One Solution.
The demand charge savings are identical per kW regardless of building size or chiller type.
Non-profit hospitals qualify for IRS §6417 elective pay — a direct cash payment equal to 30% of installed cost, approximately 12–18 months after commissioning. C-PACE financing available for $0 upfront. With 5% annual rate escalation, 20-year savings exceed $33 million on a $1.4 million net investment.
Equaphase 13IRC §6417 Direct PayC-PACE financingData centers have the ideal Equaphase load profile — constant 24/7 cooling at predictable demand levels. PCM storage also provides thermal inertia: 20–45 minutes of full cooling if the chiller trips, critical for an orderly shutdown or failover.
Equaphase 16Thermal redundancyChiller plant integrationOffice buildings have a naturally favorable load profile — peak cooling demand from 2–7 PM with the 4–9 PM summer window. PCM systems can both eliminate the on-peak demand and eliminate cooling-related electricity demand, reducing facilities-related demand charges throughout the year.
Equaphase 9 or 13Demand charge optimizationThe majority of commercial buildings below 50,000 sq ft use packaged DX rooftop units — outside the reach of conventional thermal storage. Equaphase DX adds a refrigerant-to-water HX with no chiller replacement needed. A pre-charged 5,000-gallon tank ships on a flatbed and installs in one to two days.
Equaphase DXNo chiller replacement1–2 day installOur Advantage: So Much More Than Fast Paybacks
Beyond the Super-Fast Paybacks, Equaphase Cool Storage Systems Provide:
Explicitly Covers Thermal Energy Storage
The Inflation Reduction Act's Clean Electricity Investment Credit explicitly includes thermal energy storage. Equaphase systems qualify.
Direct Pay for Hospitals, Universities & Government
Under IRC §6417, tax-exempt entities receive the 30% credit as a direct IRS cash payment — approximately 12–18 months after commissioning. No tax liability required.
Available Through 2032
Preserved in recent legislation. Consult your tax counsel for eligibility and domestic content requirements.
Zero Upfront. Savings from Day One.
Our shared savings model and C-PACE financing options eliminate the upfront capital barrier for most customers.
Zero Upfront Cost
Equaphase installs and finances the entire system. Your facility pays nothing to get started.
Equaphase Retains Ownership
We retain system ownership and capture the federal tax credits during the agreement term.
Split the Savings
Your facility and Equaphase share verified electricity cost savings. You benefit from Day 1.
Full Ownership Transfer
System ownership transfers to your facility at agreement end. You keep all future savings.
C-PACE financing also available in most California jurisdictions — long-term fixed-rate, repaid through the property tax bill, off balance sheet.
Installed. Operating. For Decades.
Over 90 major installations worldwide. No other PCM cool storage provider has a comparable history of documented field performance.
across all installations
capacity installed
still operating today
Ready to Cut Your Cooling Costs?
Request a free site analysis. We'll review your utility bills, estimate your peak demand reduction, and show you the payback — tailored to your building, your utility, and your equipment.