If you are a Duke Energy Progress customer in South Carolina who generates electricity from your own renewable facility, you may be eligible to offset your retail bill through "Net Metering." Through this arrangement you can use the electricity you generate while receiving service from Duke Energy Progress. The nameplate capacity of you generating facility cannot exceed the lesser of your estimated maximum annual kilowatt demand or r 20 kW for residential or 100 kW for non-residential.
To establish a Net Meter arrangement you will be required to complete the steps below.
All Duke Energy Progress customers that install renewable generation who intend to interconnect or operate in parallel with the utility grid must adhere to all requirements and conditions within the SC Interconnection Standard.
Customers that own generation facilities such as solar and wind, that are 100 kW or less in nameplate capacity will begin the interconnection process by reviewing the Interconnection Standards and then submitting the Application to Interconnect.
The Interconnection Request must be completed in its entirety and submitted with the requirements below. If the system is not self-installed the contact information of the installer/electrician should be listed on the request.
Documents you must submit for interconnection approval:
1) Application to Interconnect
2) One-line Diagram*
3) Copy of Insurance Declaration of Coverage –The required coverage shall be a applicable standard homeowner’s or building owner’s insurance policy with liability coverage in the amount specified below
Submit the Interconnection Request and other requirements above to the following address below.
Duke Energy Corporation
Mail Code: EM442
139 East Fourth Street
Cincinnati, OH 45202
After we evaluate the documents you send a Duke Energy Progress representative will issue contingent approval for construction of the facility provided the facility meet all interconnection and safety requirements.
*A one-line drawing is an electrical drawing of the system that identifies all major equipment associated with the generation system including the meter base. A one-line drawing can typically be provided by your installer.
Once the interconnection application is reviewed and approved, an Interconnection Agreement will be prepared by Duke Energy Progress that describes the terms and conditions of the interconnection which are specific to the project. This document must be signed and returned to Duke Energy Progress. Once all parties execute the agreement, a copy will be mailed back to the customer.
Net Metering is a billing option available to customers that install generation, such as solar photovoltaic systems, to reduce their monthly electrical usage. Net Metering allows customers to not only reduce their monthly purchases from Duke Energy Progress by generating a portion of their electrical needs but also to receive a kilowatt-hour(kWh) credit for any generation that exceeds their usage during the month. Although the Net Metering billing option is available with most Duke Energy Progress schedules, the most prevalent schedules are as follows:
The rates associated with these schedules do change over time. You can retrieve current rate schedules and other information in the links above.
1) There are several factors to consider when determining which rate schedule and net metering arrangement is best for you. The following may help you in making your decision:
Relationships between consumption and generation:
a) Your generator's output, like your electrical consumption, will likely vary throughout the year.
b) Examine when you use electricity. If your electricity is used mainly during off-peak periods, you might be able to lower your bill irrespective of net metering under a TOU schedule. Try to examine at least an annual period. If you are an existing TOU customer, this information is provided on your monthly bills.
c) Determine the running patterns of your generation to find out when and how much generation will be produced. Keep in mind the seasonal variations. Your vendor should be able to supply you with this information.
d) Using the information from (b) and (c) above, estimate how much on and off-peak power you will receive from the grid for purchase and estimate how much on and off-peak power you will deliver to the grid for credit.
Rate schedule considerations:
e) TOU rates vary by time of day and day of week while non-TOU rates do not.
f) Customers employing Rider NM w/ TOU schedules are typically billed using lower energy rates than those used under NM w/ Non-TOU based schedules. However, Rider NM w/ TOU based schedules incorporate demand charges which are based on the highest fifteen minute usage registered during on-peak periods.
g) The times and durations of on-peak and off-peak rate periods are defined on Duke Energy Progress's rate schedules.
Credits for customer generation:
h) If your generated output is consistently greater than your consumption, a "sell-all" arrangement may be more viable than a net-metering option.
2) While net metering should lessen your bill, it will not eliminate it entirely. It is advisable to look into the ways and times that you are using electricity and compare this to your generator's output such to ensure your best rate option. This effort may also help you find additional ways to conserve energy.