With one of these new technologies your business may be able to permanently shift its electricity load, which can help you save energy, money and the environment. SCE's Permanent Load Shifting (PLS) program is designed to assist SCE business customers with resources to acquire PLS enabling technologies to reduce their energy bills by shifting load from peak time periods when rates are higher to mid- and off-peak periods when rates are lower.

How The Program Works

Pursuant to an approved process by the California Public Utilities Commission (CPUC), SCE has identified and approved three third-party contractors for the PLS Program. The contractors will design, install, and provide on-going maintenance for their applicable load shifting, thermal energy system technologies. These systems are designed to use energy during non-peak hours to chill water or make ice. The stored medium is then used during on-peak hours to cool buildings via the air conditioning system. The following are three distinct types of thermal energy storage technologies proposed by our approved contractors to permanently shift your energy load to lower rate periods, thereby reducing your energy costs.

• Chilled Water Storage ("CWS") — The CWS system includes the design, installation, and operation of storage systems for chilled water so that the building’s air conditioning compressors can manufacture and store chilled water during the off-peak hours (generally at night) for use later during the day. During on-peak periods equipment such as smaller pumps and fans operate to circulate the chilled water to condition the spaces with the main compressors turned off, thereby permanently reducing a major portion of air conditioning energy usage and demand from the on-peak period.
• Ice-on-Coil ("Ice Bank") Storage — This is a modular TES system that utilizes a chilled water-glycol technology to manufacture ice in an enclosed tank for central air conditioner systems. Using the same TES principle as in chilled water storage, the ice-on-coil system will "charge" the modular tank during the off-peak hours with the electric chillers that would normally operate during the day. The Ice Bank system will manufacture and store ice at night, which will be used during the day to chill the water for air conditioning.
• Ice Storage Air Conditioning ("ISAC") — ISAC uses an external ice storage tank to provide the thermal storage for a packaged air conditioner that uses refrigerant, not water, as the cooling medium. The system operates the compressors at night to freeze water in a self-contained storage system to create ice. The ice is then used during the day to cool the refrigerant which in turn is used to air condition the building. The system may be retrofitted in existing packaged central air conditioner systems (usually 5 to 15 tons) or installed as new systems.

Who Can Participate

The PLS program is open to all business customers, including Direct Access customers, with air conditioning load that is not part of another Demand Response program, and for which the PLS project would create new or additional load shift. Eligibility will be determined by the PLS contractor and submitted to SCE for approval.

Easy To Participate

Depending on your HVAC systems and needs, contact one of the three approved SCE contractor representatives for information about their thermal energy storage technologies and how your business may benefit:

Retrofit Originality Incorporated (CWS)
www.roi-engineering.com
Scot M. Duncan, PE
21382 Countryside Drive
Lake Forest, CA 92630
Phone: (949) 370-8582
Fax: (949) 830-4114

Cypress LTD (Ice Bank)
www.cyp-res.com
Ruby Irigoyen
Toll Free: 1 877 811 8700
380 N. San Jacinto Street, Suite 202
Hemet, CA 92545
Phone: (877) 811-8700
Fax: (877) 811-5177

Honeywell Utility Solutions (ISAC)
https://buildingsolutions.honeywell.com/Cultures/en-US/Markets/Utilities/DemandResponse/
Paul Notti
6 Centerpointe Dr., Ste. 300
La Palma, CA 90623
Phone: (503) 238-3795
Fax: (714) 562-3125

If you have any questions about the program you may contact your SCE Account Representative or call the Demand Response Helpline at (866) 334-7827.

The PLS program is funded by California ratepayers and administered by Southern California Edison under the auspices of the California Public Utilities Commission. Program may be modified or terminated without prior notice.