net metering (California)

net metering (California)
Name	Net Energy Metering (California)
Jurisdiction	California
Introduced	1995
Administered by	California Public Utilities Commission
Related legislation	California Solar Initiative; Senate Bill 252; Senate Bill 327
Status	Active (with revisions)

Contents

net metering (California)

Net metering in California refers to the policy framework that credits distributed solar and energy storage customers for electricity exported to the distribution grid. The program evolved through regulatory actions by the California Public Utilities Commission, legislation enacted by the California State Legislature, and implementation by investor-owned utilities such as Pacific Gas and Electric Company, Southern California Edison, and San Diego Gas & Electric Company. Federal and state programs like the Investment Tax Credit and the California Solar Initiative helped drive deployment alongside regional institutions such as the California Energy Commission and the California Independent System Operator.

Overview

Net metering allows customer-generators to offset consumption with on-site generation, with accounts managed by utility tariffs approved by the California Public Utilities Commission. The design links to policy goals embedded in laws such as the California Renewables Portfolio Standard and programs from agencies like the Department of Energy (United States) and regional bodies such as the Western Electricity Coordinating Council. Major market actors include rooftop solar installers like SunPower Corporation and Tesla, Inc., financiers such as Mosaic, and advocacy groups including the Solar Energy Industries Association and the Environmental Defense Fund. Utility-scale interactions involve entities such as NextEra Energy and regional transmission managed by the California Independent System Operator.

Early credits to customer-generators originated under tariff decisions by the California Public Utilities Commission in the 1990s, with expanded deployment after the California Solar Initiative launched during the Arnold Schwarzenegger administration. The 2000s and 2010s saw acceleration tied to federal incentives from the Investment Tax Credit and commercial activity by firms like Sunrun and Vivint Solar. Regulatory milestones include the adoption of successor tariffs and successor programs following the Order Instituting Rulemaking processes at the California Public Utilities Commission, legislative responses from the California State Legislature including SB 252 and SB 327, and major tariff reforms such as the transition from original net energy accounting to time-varying and fixed-charge alternatives advocated in filings by Pacific Gas and Electric Company and Southern California Edison. Litigation occurred before state courts and the California Supreme Court addressing remuneration, interconnection, and subsidy questions raised by utilities, industry trade associations like the Solar Energy Industries Association, and consumer groups like the AARP.

California’s NEM program—commonly referenced under tariff names approved by the California Public Utilities Commission—defines measurement intervals, export meter treatment, and accounting periods. Successive NEM versions (NEM 1.0, NEM 2.0, NEM 3.0) reflect proceedings involving parties including Pacific Gas and Electric Company, Southern California Edison, San Diego Gas & Electric Company, the Solar Energy Industries Association, the Union of Concerned Scientists, and ratepayer advocates like the Consumer Federation of California. NEM design specifies metering standards per the Institute of Electrical and Electronics Engineers norms, safety protocols influenced by the National Electrical Code, and interconnection application processes coordinated with utilities and the California Energy Commission.

Eligibility criteria tie to rate classes for residential customers of Pacific Gas and Electric Company, commercial accounts at Southern California Edison, and municipal utilities like the Los Angeles Department of Water and Power. Systems must meet size limits, equipment standards, and permitting requirements enforced by local permitting authorities such as county building departments and the California Contractors State License Board. Interconnection follows standardized agreements modeled on industry templates from the Institute of Electrical and Electronics Engineers and incorporates studies from the California Independent System Operator for larger systems. Public agencies, nonprofits, and multifamily projects often coordinate with organizations like the California Department of Social Services and the California Public Utilities Commission’s low-income programs.

Compensation mechanisms have ranged from one-to-one retail crediting in early NEM to time-of-use (TOU) rates, non-bypassable charges, and export compensation rates set by the California Public Utilities Commission. Utilities including Pacific Gas and Electric Company, Southern California Edison, and San Diego Gas & Electric Company applied TOU periods aligned to California Independent System Operator wholesale patterns, while policy debates involved economists and institutions like the Lawrence Berkeley National Laboratory and the National Renewable Energy Laboratory. Tariff tools—demand charges, minimum bills, and fixed customer charges—were proposed by utilities and evaluated by stakeholder groups such as the Public Advocates Office and the Natural Resources Defense Council.

Deployment under NEM affected distribution planning undertaken by utilities like Southern California Edison and bulk system operations by the California Independent System Operator. Research by entities such as the Lawrence Berkeley National Laboratory and Energy and Environmental Economics, Inc. examined grid integration costs, avoided-cost valuations, and solar-driven duck curve phenomena analyzed in studies with the California Energy Commission. Economic impacts influenced firms such as Sunrun and Sunnova Energy Corporation, while equity concerns prompted programs coordinated with the California Public Utilities Commission’s low-income initiatives and community solar pilots supported by the California State Legislature and organizations like the Greenlining Institute.

Controversies over cross-subsidization, cost-shift claims, and distributional effects produced legal challenges brought by trade groups including the Solar Energy Industries Association and utility appeals by Pacific Gas and Electric Company and Southern California Edison in administrative hearings at the California Public Utilities Commission and litigation in state courts. Reforms such as successor tariffs and export compensation models resulted from settlements and decisions influenced by stakeholders including the Office of Ratepayer Advocates (now the Public Advocates Office), consumer advocates like the AARP, environmental organizations including the Sierra Club, and industry participants such as Tesla, Inc. and NextEra Energy Resources. Ongoing reforms address integration with storage technologies promoted by companies like LG Chem and policy frameworks set by the California Energy Commission and the California State Legislature.

Category:Energy policy in California