Solar Thermal Electric

Interconnection Standards

The Iowa Utilities Board (IUB) adopted rules for utilities in May 2010 for the interconnection of distributed generation facilities in Iowa. The interconnection rules were most recently updated in 2017.

Rate-Regulated Utilities

Rate-regulated utilities include the state's two investor-owned utilities, MidAmerican Energy and Interstate Power and Light (IPL), and Linn County Rural Electric Cooperative, which opted to have the IUB set its rates. The rates of municipal utilities and other rural electric cooperatives are not regulated by the IUB.

Process

Interconnection standards for rate-regulated utilities apply to distributed generation facilities of up to 10 megawatts (MW)* that are not subject

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USDA - Rural Energy for America Program (REAP) Grants

Note: The U.S. Department of Agriculture's Rural Development issues periodic Notices of Solicitation of Applications for the Rural Energy for America Program (REAP) in the Federal Register.

The Rural Energy for America Program (REAP) provides financial assistance to agricultural producers and rural small businesses in America to purchase, install, and construct renewable energy systems, make energy efficiency improvements to non-residential buildings and facilities, use renewable technologies that reduce energy consumption, and participate in energy audits and renewable energy development assistance.

Renewable energy projects for the Renewable Energy Systems and Energy Efficiency Improvement Guaranteed Loan and Grant Program include wind, solar

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Green Power Purchasing

Residential and Commercial Green Power Purchasing

Maine Green Power allows Maine electric customers to choose clean, local renewable energy for their home or business. When you sign up, you will see an additional line item charge on your monthly utility bill for participating in Maine Green Power. The Maine Green Power Program matches the purchase amount with Renewable Energy Certificates, or RECs, that are produced in Maine. For more information, or to enroll, visit here.

Government Green Power Purchasing

In 2003, Maine's governor established a goal for the state government to buy at least 50% of its electricity from

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City of Austin - Renewables Portfolio Standard

The City Council of Austin, Texas, first adopted a renewable portfolio standard (RPS) in 1999 (Resolution No. 990211-36). The RPS was subsequently amended several times, with the current RPS goal—65% renewables by 2027—among the most ambitious in the nation. In 2019, the city's Climate Equity Plan established a goal of net-zero community-wide greenhouse gas emissions by 2040.

Eligible Technologies

Renewable resources include those that rely on energy derived directly from the sun, wind, geothermal, hydroelectric, wave or tidal energy, or biomass or biomass-based waste products, including landfill gas.

Goals and Requirements

The RPS for Austin Energy (the City of Austin’s

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Mandatory Utility Green Power Option

Note: El Paso Electric previously offered a Renewable Energy Tariff Program, but it is no longer available.

In addition to meeting the requirements of the state renewable portfolio standard, the New Mexico Public Regulation Commission may require IOUs to offer customers a voluntary program for purchasing renewable energy. The voluntary renewable energy tariff may also allow consumers to purchase renewable energy within certain energy blocks and by source of renewable energy. IOUs are also required to develop an educational program communicating the benefits and availability of the green power option. 

The three IOUs that serve New Mexico customers offer the

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Refundable Payroll Tax Credit

Note: Public Act 38 of 2011 repealed the Michigan Business Tax (MBT) and implemented the Corporate Income Tax (CIT). Public Act 39 was passed in conjunction with the CIT and allows for certain credits awarded under the MBT to be retained for the duration of the agreements. Businesses receiving certain credits, including Renaissance Zone credits, may choose to either continue to file under the MBT to continue claiming their credits, or file under the CIT. No additional Renaissance Zone credits will be awarded after 2011.

Businesses certified by the NextEnergy Authority that locate in the NextEnergy Zone to research, develop

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Renewables Portfolio Standard

California’s Renewables Portfolio Standard (RPS) was originally established by legislation enacted in 2002. Subsequent amendments to the law have resulted in a requirement for California’s electric utilities to have 60% of their retail sales derived from eligible renewable energy resources in 2030 and all subsequent years. The law established interim targets for the utilities as shown below. Publicly Owned Municipal Utilities (POUs) are not regulated by the CPUC but are affected by the law nonetheless, and their governing boards are charged with establishing procurement requirements based on the interim goals below:

  • 20% of retail sales by December 31, 2013
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Interconnection Standards

New Hampshire requires all utilities selling electricity in the state to offer net metering to customers who own or operate systems up to one megawatt (MW) in capacity that generate electricity using solar, wind, geothermal, hydro, tidal, wave, biomass, landfill gas, bio-oil, or biodiesel; the capacity for group net-metered systems with a municipal host only is 5 MW. Combined heat and power (CHP) systems that use natural gas, wood pellets, hydrogen, propane, or heating oil are also eligible.*

The PUC's rules for net metering, which distinguish between small customer-generators (up to 100 kilowatts) and large customer-generators (greater than 100 kW

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Interconnection Standards

The Washington Utilities and Transportation Commission (UTC) adopted interconnection standards for distributed generation (DG) systems up to 20 megawatts (MW) in capacity in 2007, and revised these standards in July 2013. The rules apply to the state's investor-owned utilities (Avista, PacifiCorp, and Puget Sound Energy), but not municipal utilities, public utility districts, or cooperative electric utilities. 

The revised standards provide for three separate levels of interconnection based on system capacity and other requirements. The first level, Tier 1 systems, applies generally to systems up to 25 kilowatts (kW) using inverter-based interconnection equipment. The second tier applies generally to systems sized

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Interconnection Standards

Virginia has two interconnection standards: one for net-metered systems and one for systems that are not net-metered.

Interconnection for Net-Metered Systems

Customer-generators that net meter must comply with the interconnection rules within the regulations governing net metering (20 VAC 5-315-40). These rules apply to residential customers with generation facilities up to 20 kW in capacity and non-residential systems up to 1,000 kW in capacity. Utilities that have already enrolled 1% of their peak load for the previous year are not required to allow additional customers to net meter. More information is available under DSIRE Virginia net metering post. 

Customer-generators with

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