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Solar Energy Wiki

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250 concepts · 176 concept relationships · counts derived from the ontology registry

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Published concepts 49

  • Electricity pricing is the set of prices and rate structures used to charge customers for electricity service.

    GS-CONCEPT-011 · Grid · Source event date unavailable
  • Net meteringPublished

    Net metering is a billing mechanism that credits a customer for eligible electricity exported to the grid.

    GS-CONCEPT-012 · Grid · Source event as of November 2020
  • Net billingPublished

    Net billing is a billing arrangement that values electricity exported to the grid separately from electricity imported from the grid.

    GS-CONCEPT-013 · Grid · Source event as of November 2020

  • A time-of-use electricity rate charges different prices for electricity during predefined periods within a day.

    GS-CONCEPT-014 · Grid · Source event as of July 14, 2020

  • Grid interconnection is the technical and administrative process for connecting a customer energy system to an electric utility distribution system under applicable requirements.

    GS-CONCEPT-054 · Grid · Source event date unavailable

  • FERC’s Small Generator Interconnection Agreement is a model agreement between a Transmission Provider and an Interconnection Customer governing how a Small Generating Facility interconnects with and operates in parallel with the provider’s transmission system.

    GS-CONCEPT-055 · Grid · Source event date unavailable

  • Permission to operate is a utility's authorization for an interconnected customer system to begin operating under the utility's stated conditions after required project steps are complete.

    GS-CONCEPT-056 · Grid · Source event date unavailable

  • A photovoltaic export limit is a configured or contractual maximum on power delivered from a customer photovoltaic system to the utility grid.

    GS-CONCEPT-057 · Grid · Source event as of September 30, 2020

  • A non-export photovoltaic system is designed or controlled so electricity is not intentionally delivered from the customer site to the utility grid under the applicable interconnection arrangement.

    GS-CONCEPT-058 · Grid · Source event as of September 30, 2020

  • A distributed energy resource is a comparatively small generation, storage, demand-response, efficiency, thermal-storage, or similar resource connected on a distribution system or behind a customer meter.

    GS-CONCEPT-059 · Grid · Source event as of September 28, 2020

  • Behind-the-meter generation is electricity generation located on the customer side of the utility billing meter or other defined customer-grid boundary.

    GS-CONCEPT-060 · Grid · Source event as of September 28, 2020

  • An electricity fixed charge is a bill charge determined independently of the customer's metered kilowatt-hour consumption during the billing period under the applicable rate schedule.

    GS-CONCEPT-061 · Grid · Source event date unavailable

  • An electricity demand charge is the portion of an electric-service bill based on the customer's measured or calculated maximum capacity usage under the applicable rate schedule.

    GS-CONCEPT-062 · Grid · Source event date unavailable

  • A tiered electricity rate applies different energy prices to defined blocks of electricity consumption within a billing period.

    GS-CONCEPT-063 · Grid · Source event date unavailable

  • An export compensation rate is the monetary or bill-credit value assigned to eligible electricity delivered from a customer energy system to the grid under a specified program or tariff.

    GS-CONCEPT-064 · Grid · Source event as of November 2020

  • An avoided-cost rate is a value based on costs a utility or system avoids because a specified increment of electricity or service is supplied by another resource.

    GS-CONCEPT-065 · Grid · Source event as of November 2020

  • Under SDG&E Rule 21, the point of common coupling is the electricity transfer point between the utility's electrical conductors and the producer's electrical conductors.

    GS-CONCEPT-185 · Grid · Source event as of August 6, 2023

  • Under SDG&E Rule 21, the point of interconnection is where interconnection facilities connect to the utility's distribution or transmission system; it may or may not coincide with the point of common coupling.

    GS-CONCEPT-186 · Grid · Source event as of August 6, 2023

  • Utility interconnection facilities are the facilities used to interconnect a generating facility under Rule 21, which may be integral to or separate from that facility.

    GS-CONCEPT-187 · Grid · Source event as of August 29, 2023

  • The utility distribution system is the portion of SDG&E's electric system used to distribute electricity as defined by Electric Rule 21.

    GS-CONCEPT-188 · Grid · Source event as of August 29, 2023

  • Nominal operating voltage is an editorial compound label used here to discuss Rule 21's defined term Nominal; it is not itself a defined Rule 21 tariff term.

    GS-CONCEPT-189 · Grid · Source event as of August 29, 2023

  • Voltage regulation is the reliability function of maintaining voltage within an acceptable range on an electric power system, as described in FERC's Reliability Primer.

    GS-CONCEPT-190 · Grid · Source event as of September 20, 2024

  • Reactive power is the portion of electricity that establishes and sustains the electric and magnetic fields of alternating-current equipment.

    GS-CONCEPT-191 · Grid · Source event date unavailable
  • Power factorPublished

    Power factor is the ratio of real power in kilowatts to apparent power in kilovolt-amperes for a given load and time.

    GS-CONCEPT-192 · Grid · Source event date unavailable

  • Volt-VAR is a DER control mode that adjusts reactive-power output as a function of voltage, as described in NREL’s workshop presentation on IEEE 1547-2018 capabilities.

    GS-CONCEPT-193 · Grid · Source event as of January 4, 2023

  • Volt-Watt is a DER control mode that limits maximum active power as a function of voltage, as described in NREL’s workshop presentation on IEEE 1547-2018 capabilities.

    GS-CONCEPT-194 · Grid · Source event as of January 4, 2023

  • Frequency-Watt control is a real-power-versus-frequency curve described in NREL's technical report.

    GS-CONCEPT-195 · Grid · Source event date unavailable

  • Ride-through capability describes a DER capability for voltage or frequency abnormal conditions in NREL's technical report.

    GS-CONCEPT-196 · Grid · Source event date unavailable

  • Anti-islanding protection is the Rule 21 tariff concept addressing an unintentional island, without establishing compliance for any specific device.

    GS-CONCEPT-197 · Grid · Source event as of August 29, 2023

  • Smart-inverter function profile is GeoStellar's editorial grouping for the function-related settings listed in SDG&E Rule 21 Table Hh-4; it is not a Rule 21-defined national profile.

    GS-CONCEPT-198 · Grid · Source event as of August 29, 2023

  • Smart-inverter commissioning settings is GeoStellar's editorial term for applicable settings verified through the Rule 21 commissioning-testing process.

    GS-CONCEPT-199 · Grid · Source event as of August 29, 2023

  • An interconnection application is the Rule 21 application and interconnection request that starts the utility's review process.

    GS-CONCEPT-200 · Grid · Source event as of August 29, 2023

  • An interconnection study is a Rule 21 process for evaluating distribution-system impacts, facilities, and upgrades for an interconnection request.

    GS-CONCEPT-201 · Grid · Source event as of August 29, 2023

  • Hosting capacity is planning information from integration-capacity analysis, which Resolution E-5440 addresses through utility remediation plans and baseline reporting.

    GS-CONCEPT-202 · Grid · Source event as of April 9, 2026

  • Export control mode is an interconnection configuration that uses Rule 21 non-export or limited-generation-profile options to constrain grid export.

    GS-CONCEPT-203 · Grid · Source event as of July 9, 2025
  • Smart meterPublished

    A smart meter is commonly discussed within EIA's advanced-metering range, from basic hourly interval meters to real-time meters with two-way communication.

    GS-CONCEPT-204 · Grid · Source event as of October 20, 2023

  • Advanced metering infrastructure is one of the metering technologies reported in EIA-861 data, alongside automated meter reading and standard meters.

    GS-CONCEPT-205 · Grid · Source event date unavailable

  • In SDG&E Rule 1, an interval meter records usage in 15-minute-or-less intervals for that tariff definition.

    GS-CONCEPT-206 · Grid · Source event as of April 1, 2026
  • Net loadPublished

    In EIA's battery-storage analysis, net load is system load minus nondispatchable wind and solar generation within that analysis boundary.

    GS-CONCEPT-207 · Grid · Source event as of August 2022

  • A household load profile is an hourly or subhourly time series of electric-load values in kilowatts for a building.

    GS-CONCEPT-208 · Grid · Source event date unavailable
  • Load controlPublished

    Direct load control is EIA's narrow demand-side-management category in which utility system-operator control can interrupt consumer load at annual peak.

    GS-CONCEPT-209 · Grid · Source event date unavailable

  • EIA defines demand response programs as incentive-based programs that encourage customers to temporarily reduce demand at certain times in exchange for lower electricity bills. Some programs permit direct operator control, while others leave control with the customer.

    GS-CONCEPT-210 · Grid · Source event date unavailable

  • In CAISO's tariff, a Distributed Energy Resource Provider is the owner or operator of one or more Distributed Energy Resource Aggregations that participates in CAISO markets in that capacity.

    GS-CONCEPT-211 · Grid · Source event as of May 29, 2026

  • In CAISO's tariff, a Distributed Energy Resource Aggregation is a resource made up of one or more distributed energy resources.

    GS-CONCEPT-212 · Grid · Source event as of May 29, 2026

  • FERC says ancillary services help keep the grid stable and resilient by maintaining frequency, reducing voltage fluctuations, helping prevent outages, and responding to sudden changes.

    GS-CONCEPT-213 · Grid · Source event date unavailable

  • FERC's Energy Primer describes frequency regulation as automatic changes in selected resources' output that follow very short-term load changes to maintain system frequency.

    GS-CONCEPT-214 · Grid · Source event as of January 17, 2024

  • FERC's ancillary-services overview describes voltage support as maintaining electrical voltage within safe operating limits so equipment works properly.

    GS-CONCEPT-215 · Grid · Source event date unavailable

  • Critical peak pricing uses higher prices during a limited number of critical hours.

    GS-CONCEPT-216 · Grid · Source event as of January 17, 2024

  • FERC's Energy Primer describes real-time pricing as charging customers prices that reflect the immediate cost of power.

    GS-CONCEPT-217 · Grid · Source event as of January 17, 2024
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