Producing Clean Energy
- Clean Energy Facts
- Producing Clean Energy
- Integration Tools and Resources
- Electric Vehicles
- Going Solar
- Smart Grid and Smart Meters
- How You Can Help
Commonly Asked Questions
Have questions about our new programs for customer generated clean energy? Click here >
Sizing Rooftop Solar
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Net Energy Metering (NEM)
Our NEM program is closed for new applications. For existing NEM customers, click here for more information >
Customer Self-Supply and Grid-Supply Programs
Distributed Energy Resource Programs
|April 2017: A recent decision by the Hawaii Public Utilities Commission added space to the Customer Grid-Supply program by transferring capacity of private rooftop solar systems that were approved in the past several years but never completed. Read more >|
Traditionally, generation of electricity takes place at power plants. This is referred to as centralized generation. Distributed energy resources refer to generators of electricity at many locations throughout the electric grid, such as PV systems mounted on rooftops in residential neighborhoods.
The great success of solar photovoltaic (PV) in Hawaii has dramatically altered the way our electric grid works. Designed for power to flow in only one direction from a centralized power plant, the grid now also receives power from thousands of small distributed energy resources systems.
Our Distributed Energy Resource Programs:
- Customer Self-Supply (CSS) is intended only for solar PV installations that are designed to not export any electricity to the grid. Customers are not compensated for any export of energy.
- Customer Grid-Supply (CGS) customers receive a PUC-approved credit for electricity sent to the grid and are billed at the retail rate for electricity they use from the grid.
The Hawaii Public Utilities Commission (PUC) approved these rooftop PV programs to support the continued growth of rooftop PV and ensure safe, reliable service and fair treatment for all customers. The decision is the result of the PUC's effort to develop long-term technical and policy solutions that will support the continued growth of rooftop PV in Hawaii.
These programs provide customers with options to install both traditional rooftop PV systems and systems equipped with new emerging technologies, such as battery storage systems.
Customer Self-Supply (CSS)
CSS enables customers to install PV systems that do not export power to the utility grid. These systems can incorporate the use of energy storage devices, like batteries. All power produced by the customer's system will need to be used or stored to be used by the customer at a later time.
CSS systems are eligible for expedited review and approval of applications in areas with high levels of PV. CSS is only available for solar PV systems and not for other forms of renewable energy.
In addition, to help cover the fixed costs of providing service to PV customers who remain connected to the grid for continued service even when their PV systems are not producing energy, electric account holders for new residential PV systems will pay a minimum monthly bill of $25.
Applications / Forms
Customer Grid-Supply (CGS)
CGS enables residential and commercial customers to connect distributed energy systems (up to 100 kW total output capacity) to the electric grid. CGS provides eligible customers with credits on their electric bills for excess electricity sent to the grid or energy delivered by the Company to the customer-generator, whichever is less at a fixed rate approved by the Hawaii Public Utilities Commission (see table below). These credits can help customers offset all or part of their electrical usage and lower their bills. These customers are billed the retail rate for all electricity they use that they receive from the utility.
As ordered by the PUC, at the end of your monthly billing cycle, any remaining credit in excess of your billed amount will be forfeited. Therefore, it is important that customers do not oversize their system.
In addition, to help cover the fixed costs of providing service to PV customers who remain connected to the grid for continued service even when their Distributed Energy Resource systems are not producing energy, electric account holders for new residential PV systems will pay a minimum monthly bill of $25.
- Click here for more details about how CGS billing works
- Download our Sizing Rooftop Solar Right brochure
Program Capacity Remaining
The PUC has set a capacity limit by service territory for the Customer Grid-Supply program.
|Island||Total Capacity MWac*|
|Hawaiian Electric||25.00||Read news release|
|Maui Electric**||5.00||Read news release|
|Hawaii Electric Light||5.00||Read news release|
* Accounts for all applications that are undergoing and have passed completeness review. Excludes all applications that have not passed completeness review and customer action is required.
** Includes Maui, Molokai and Lanai
Applications / Forms
Commonly Asked Questions
Click here for commonly asked questions regarding our Customer Grid-Supply and Customer Self-Supply programs.