If you are producing more than you are consuming, then the excess energy goes to the grid. Conversely, if you are consuming more than you are producing, then all of your generated energy is being consumed by you, and any additional energy requirements you have will be provided from the grid (i.e., in-flow kWh). The figures below illustrate two basic scenarios for power flow between the DRG, customer's facility, and the grid.
Why is the generated energy shown on my customer-owned meter different from the Oncor meter out-flow kWh energy register?
Customer-owned metering is installed to measure the total energy generated by the renewable system. Customer generation can serve customer loads or be exported to the grid. The Oncor out-flow kWh register only measures the energy sent to the grid. In the example below you can see that customer generation totaled 1,000 kWh, but only 500 kWh went through the Oncor out-flow (057) register to the grid.
The only time you would expect to have your Customer Owned Meter total generation monthly output be equal with the Oncor out-flow kWh register would be when you have no energy being consumed at your facility. Oncor encourages customers to take monthly meter readings of their customer owned meter at or close to the Oncor end of cycle meter reading dates. Knowing both the amount generated by your renewable system and the amount sent to the grid (out-flow 057) will enable you to estimate how much customer owned generation you used directly from your generating system.
In the example below, the customer consumed 1,500 kWh but only registered 1,000 kWh on his in-flow (001) register. The customer consumed 500 kWh directly from his generating system and returned 500 kWh to the grid.
For additional information, refer to: How do I read my distributed renewable generation (DRG) meter?
Net Metering at Oncor
Oncor utilizes metering that measures in-flow and out-flow energy in separate channels.
"Net metering" is commonly defined as a single channel meter (some say "spins forward and backward" if an analog meter) that allows for off-sets (some say energy banking) and results in one value being reported at the end of the billing period. TDUs in Texas are not allowed to install meters that subtract out-flow from in-flow within the meter. Anytime you simultaneously generate and consume electric energy you are "netting" and avoiding using energy you would have purchased at retail rates.
TDUs, such as Oncor do not issue credits or provide benefits for out-flow energy. TDUs are prohibited from buying and selling electric energy. You will need to contact your REP for questions related to credits or benefits related to your electric bill. There are some issues (listed below) that could delay or prevent out-flow kWh reporting.The following are issues and requirements that could delay or cause customer credits/benefits not to occur:
When your meter is registering energy flow, the scroll bar moves across the bottom of the digital register display. When energy is coming in, the scroll bar progresses from left to right. When energy is going out to the grid, it progresses from right to left.
One way to ensure your system is working is to turn off all energy-consuming devices, including your generation system. If everything is off, the scroll bar will stop. Once you’ve verified that it’s stopped, turn your generation system back on-line and the scroll bar should start to move from right to left.To determine if your system is operating as expected, take a reading of the 057 out-flow kWh register. If you have a three kW solar system operating at full capacity, then in one hour you should produce three kWh (3 kW x 1 hr = 3 kWh) and the out-flow register should have incremented by three units.
No. Oncor utilizes metering that measures in-flow and out-flow energy in separate channels.
"Net metering" is commonly defined as a single channel meter (some say "spins forward and backward" if an analog meter) that allows for off-sets (some say energy banking) and results in one value being reported at the end of the billing period. Transmission and distribution utilities (TDUs), such as Oncor, provide meters that measure separate in-flow and out-flow values for renewable generators pursuant to state law and Public Utility Commission of Texas (PUCT) rules. TDUs in Texas are not allowed to install meters that subtract out-flow from in-flow within the meter. Remember, anytime you simultaneously generate and consume electric energy you are "netting" and avoiding using energy you would have purchased at retail rates.
For additional information, refer to: What happens to the energy I generate?
No, but you can find that information at powertochoose.org or by calling 866-797-4839.
Yes, but only if you have an Oncor-installed DRG meter and an account on smartmetertexas.com.
In-flow data can be viewed on the website in 15-minute intervals in tabular or graphical format and can also be exported in a comma separated value (CSV) text file.Out-flow data cannot be viewed in 15-minute intervals in tabular or graphical format, and can only be exported in a CSV text file. You will need to select a date range of two days or more to get out-flow data when exporting.CSV files can be opened in a variety of software applications that are used to create spreadsheets or databases. Please call the Smart Meter Texas help desk at 888.616.5859 with any questions or issues you have with registering on the website or with viewing or exporting your energy data.
Oncor does not provide this type of metering. Oftentimes incentive programs require a meter that measures the total output of the renewable system. This type of metering is sometimes called "Customer-Owned Measurement and Verification Metering." Oncor only provides metering that measures the in-flow and out-flow energy at the Oncor point of common coupling (Oncor delivery point.) Please consult your contractor or vendor to obtain a customer-owned meter to satisfy this requirement.
No. If you have an analog meter, Oncor will replace it with a new, specially programmed digital meter. If you have a new digital meter, Oncor will reprogram it to register in-flow and out-flow (a "dual register" meter).
For additional information, refer to: How can I get an in-flow/out-flow "dual register" meter?