MIS LOG IN
About ERCOT
About ERCOT
Company Profile
Vision and Mission
Community Involvement
Governance
Board of Directors
Executive Team
Membership
Ethics
HB 4492 Securitization
Subchapter M Default Balance Securitization
Subchapter N Uplift Balance Securitization
Legal Policies and Notices
Proposed Brazos and ERCOT Bankruptcy Settlement
Financial Information
Board Ethics Agreements
Legal Notices
February 2021 Extreme Weather Event
September 7, 2023 DOE 202(c) Order
News and Publications
Media Kit
Helpful Resources
News Releases
Trending Topics
Spring 2024
ERCOT Mobile App & Website Redesign
ERCOT Reliability Monitor Program
Careers
Life at ERCOT
Development Programs
Internship Program
Procurement
Request for Proposal
Locations
Contact Us
Information Request
ERCOT Innovation Summit
Services
Services
Client Services
Account Management
Market Support
MarkeTrak Information
Market Participant Communications
Market Notice Archives
Operations Messages
Power Operations Bulletins
Public Notices
System Outage Notices
Programs
Demand Response
Firm Fuel Supply Service
QSE Services Available on Short Notice
Renewable Energy Credit
Texas Cybersecurity Monitor Program
Projects
Registration and Qualification
Congestion Revenue Rights Account Holder
Credit
Independent Market Information System Registered Entity
Load Serving Entities
Qualified Scheduling Entities
Resource Entities
Resource Integration
Transmission/Distribution Service Providers
Service Level Agreements
Training
Course Catalog
Course Recommendations
ERCOT System Operator Certification Exam
Archived Workshop Materials
Market Data Transparency
DDLs
User Guides
Digital Certificate Security Information
XSDs
ERCOT Public API Applications
Committees and Groups
Committees and Groups
Meeting Calendar
PUCT
Board of Directors
Finance and Audit Committee
HR and Governance Committee
Reliability and Markets Committee
Technology and Security Committee
Technical Advisory Committee
Large Flexible Load Task Force
Credit Finance Sub Group
Real-Time Co-optimization plus Batteries Task Force
Protocol Revision Subcommittee
Retail Market Subcommittee
Lubbock Retail Integration Task Force
Market Coordination Team for Texas SET Version Releases
Profiling Working Group
Retail Market Training Task Force
Texas Data Transport and MarkeTrak Systems Working Group
Texas Standard Electronic Transaction Working Group
Reliability and Operations Subcommittee
Black Start Working Group
Dynamics Working Group
Inverter-Based Resource Working Group
Network Data Support Working Group
Operations Training Working Group
Operations Working Group
Performance, Disturbance, Compliance Working Group
Planning Geomagnetic Disturbance Task Force
Planning Working Group
System Protection Working Group
Steady State Working Group
Voltage Profile Working Group
Wholesale Market Subcommittee
Congestion Management Working Group
Demand Side Working Group
Market Settlements Working Group
Metering Working Group
Resource Cost Working Group
Supply Analysis Working Group
Wholesale Market Working Group
Inactive Groups
Other Groups
Workshops
Market Participants
Market Rules
Market Rules
Protocols - Nodal
Current Protocols - Nodal
Protocol Library - Nodal
Nodal Protocol Revision Requests
NPRR Submission Process
Protocol Interpretation Request Submission Process
Archives - Zonal
PUCT Directives
Phase 2 Bridging Options
Southern Cross Transmission
Real-Time Co-Optimization
Emergency Operations Plans
Market Guides
Commercial Operations Market Guide
Data Transport Guides
Load Profiling Guide
Nodal Operating Guide
Operating Procedures
Planning Guide
Resource Registration Glossary
Retail Market Guide
Settlement Metering Operating Guide
Texas Standard Electronic Transaction Guides
Verifiable Cost Manual
Inactive Market Guides
Pilot Projects
Aggregate Distributed Energy Resource (ADER) Pilot Project
30-Minute Emergency Response Service - Completed
Fast Responding Regulation Service - Completed
Weather-Sensitive Emergency Response Service - Completed
System Changes
System Change Requests
Compliance in ERCOT
Business Practice Manual
Other Binding Documents
Other Binding Documents List
Other Binding Documents Revision Requests
Key Priorities
Battery Energy Storage
Market Information
Market Information
Congestion Revenue Rights
Day-Ahead Market
Real-Time Market
Marginal Losses
Market Prices
Retail
Lubbock Power & Light Transition
Labeling of Electricity
Load Profiling
Backcasted (Actual) Load Profiles - Historical
Metering
Competitive Metering
ERCOT-Polled Settlement Metering
TDSP Distribution Loss Factors - Methodology
Data Aggregation
IDR Protocol Compliance Verification - Historical
ERCOT Four Coincident Peak Calculations
Shadow Settlement Instruction Guides
UFE Analysis Reports
Settlements
Market Reports
Grid Information
Grid Information
Current System Conditions
Generation
Summer Weather Readiness
Inverter Based Resources Integration Reports
Winter Weather Readiness
Load
Hourly Load Data Archives
Supplemental Data for COVID-19 Scenario
Load Forecast
Transmission
Production Load Schedule
Resource Adequacy
Market Reports
Planning
Market Participants
Market Participants
EMIL
MIS Log In
RIOO Log In
Renewable Energy Credit
News Releases
Grid and Market Conditions
Home
Market Information
Data Aggregation
2020 Data Aggregation
2020 Data Aggregation
Key Documents
2020 TDSP Transmission Loss Factors - Methodology
Jan 6, 2020 - xlsx - 30.8 KB
Historical Loss Factors 2020 01 01 thru 2020 12 31 20210105
Jan 5, 2021 - xlsx - 10.8 MB
View Other Years
Latest
2023
2022
2021
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
Latest
2023
2022
2021
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
ERCOT-Lockup-white
