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Oncor

Texas Utility Interconnection & net metering rules
Net Metering Allowed0
NEM TypeN/A
Supply Side Taps Allowed1
Line Taps Allowed1
Load Taps Allowed0
AC Disconnect RequiredYes

Net metering & export

Net Metering Allowed
0
NEM Type
N/A
TOU Utility
0
Post Solar Billing Method
Export Rate
Solar Export Type
Fixed kWh
Solar Export Value Notes
Oncor offers no credit for excess solar generation exported to the grid. Customers must sign up with a third party supplier who offers a buyback credit.
Net Excess Generation Notes
  • For customers who utilize Oncor as their energy supplier, Oncor does not offer a solar buyback program (i,e. net metering or an export rate) and thereby does not give any credit for excess solar generation exported to the grid.
  • It is the customer's responsibility to sign up with a retail energy provider who offers a buyback program. Customers are strongly encouraged to maximize the value of their solar system by doing this.
Rebates Offered
0
Deregulated
1
Allows Standby
1

Interconnection & taps

Approval Req To Install
Yes
Interconnection Level
1
Supply Side Taps Allowed
1
Line Taps Allowed
1
Load Taps Allowed
0
Tap Criteria
  • Load Side Taps Not Allowed
Automatic Transformer Upgrade Size
0
Meter Aggregation Allowed
0

System size & offset

System Size Restrictions
0
System Size Restriction Type
No Restrictions
System Size Battery Included
0
System Size Includes Existing Systems
0
Offset Type
No Restrictions
Offset Value
0
Offset Calculation Period
0
Industry Standard Watts Sqft
2
Offset Calc Tool
N/A

Metering & disconnect

Production Meter Required
No
Production Meter Position
N/A
Production Meter Labeling
N/A
AC Disconnect Required
Yes
AC Disconnect Labeling
Visible Lockable Labeled Disconnect
Meter Spot Required
0
Meter Spot Process
  • If we are needing a cut and re-seal, the electrician on site will need to call the 24 hour Electrician Line at and it can be scheduled the same day
  • If we are needing a full disconnect and re-connect, Oncor will need a 3 days advance notice and the Oncor Solar Department will need to be called at
Allowed Meter Adapter
None

Plans & docs

Site Plan Reqs

All Jobs

  • ESID REQUIRED ON ALL PROJECTS. ADD INTO RELAY SECTION FOR ESID ------> ESID LOOKUP
  • METER NUMBER REQUIRED ON ALL PROJECTS
  • Quantity, model number, and manufacturer name should be listed on site plan
  • Call out all equipment WITH A LEADER on the site plan. Legend will NOT suffice
  • Include complete equipment details including 240V or 208V [Example: Manufacturer (Name) Model (Number) (240V/208V)]
  • Oncor requires that the MSP has a main breaker or an MBE no hot / split-busses

Existing System

  • On the site plan the existing modules need to be shown individually, not per array.
SLD Reqs

All Jobs

  • NO METER MAIN COMBOS (Meter and MSP with internal panelboard)
  • METER MBE COMBOS ARE ALLOWED WHEN EXISTING BUT SHOULD NOT BE USED FOR MPUs
  • Oncor does not permit devices to be installed between the meter and meter socket or devices within the meter socket.
  • Each Diagram must be a single page, completely flattened, non-editable, PDF, less than 2MB.
  • Include complete equipment details including 240V or 208V [Example: Manufacturer (Name) Model (Number) (240V/208V)]

Existing System

  • Existing systems must be present on TLD and include quantity, make, model, and manufacturer of all existing equipment
  • Existing AC disconnect must be labeled as Visible, Lockable, Labeled, Disconnect
  • NEW Enphase system must be separate from existing Enphase systems, cannot land new breaker in existing combiner

Battery System

  • Oncor is OK with a generation disconnect that disconnect both solar and ESS
  • Visible, Lockable, Labeled, Disconnect required between the battery and Utility Meter
Electric Service Reqs


Install Reqs


Placards
  • Oncor requires caution or warning placards on all distributed generation (DG) projects; placards must also meet NEC requirements
  • Placard examples are available in the files section
  • If the AC disconnect is within 10 feet of the Oncor meter, use this placard text: “CAUTION - Alternate Power Supply AC System Disconnect”
  • If the AC disconnect is more than 10 feet from the Oncor meter, use this placard text: “CAUTION - Power to this service is also supplied from on-site solar generation. Disconnect located on indicate location of this structure”
  • When the AC disconnect is more than 10 feet from the meter, placards must be installed at the Oncor meter location and at the AC disconnect location
Electrical Stamp Required
0
Meter Num Req SLD 3LD
1
ESID Num Req SLD 3LD
1
Site Plan Notes

All Jobs [The Visible, Lockable, Labeled AC Disconnect is located within 10 ft. of Oncor Meter]

Label Page Notes


Cover Page Notes


Electrical Diagram Notes

All Jobs [The Visible, Lockable, Labeled AC Disconnect is located within 10 ft. of Oncor Meter]

Website
link
Phone
(866) 258-1874

Other details

Restrict Inspection
0
Revision Required
0
Mod Swap Requires Planset
0
Address ID
108097
Express Planset Eligible
Yes
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with Oncor before you rely on this. The useful move: if an installer says you need a main panel upgrade, ask how these tap and interconnection policies were considered first.