Rules by state

Solar and battery interconnection rules in Rhode Island

Rhode Island standards for connecting distributed generation. Every threshold below was read out of the document linked at the bottom of this page, and the same rules answer the free screening check.

Who this binds: investor owned utilities. A utility outside that list sets its own terms, so confirm who serves the address first.

Check a Rhode Island address free
How the size is measured

nameplate rating: the individual or sum total maximum continuous power output in alternating current of all generating units and energy storage systems, regardless of whether it is limited by any approved means. Export capacity is the maximum nameplate rating in alternating current except where limited by an acceptable means. The tariff uses both quantities on the same project.

Size bands and what each one obliges

Simplified Size 0 to 25 kW

Listed inverter based facilities with an export capacity of 25 kW or less, where the aggregate nameplate rating of all generating and storage equipment operating in parallel does not exceed 50 kW. Both tests must pass. The screen places this tier at 25 kW because a system with no stated export limit exports everything it makes; a deliberately export limited design may reach the higher nameplate allowance. There is no pre application report fee and no application fee, and no insurance is required for a facility eligible for net metering.

  • No application fee
  • Export capacity not above 25 kW as well as aggregate nameplate not above 50 kW
  • No insurance for a net metered facility
Expedited Size 25.001 to 1000 kW

Listed facilities passing the pre specified screens on a radial system. The pre application report and the application fee are each $100 below 250 kW, $250 from 250 to 500 kW and $750 above 500 kW. Supplemental review is $3 per kW with a $300 minimum and a $2,500 maximum. Insurance is $500,000 above 10 kW to 100 kW and $1,000,000 above 100 kW to 1 MW, but nothing is required at or below 50 kW for a net metered facility.

  • $100 to $750 pre application and application fees by size
  • Supplemental review at $3 per kW, minimum $300 and maximum $2,500
Standard Size 1000.001 to 10000 kW

All facilities not qualifying for the smaller processes on radial and spot network systems, and all facilities on area networks. Insurance is $2,000,000 per occurrence with $5,000,000 aggregate above 1 MW to 5 MW and $5,000,000 above 5 MW.

  • $2,000,000 per occurrence and $5,000,000 aggregate above 1 MW to 5 MW
  • Construction security of long lead equipment or 25 percent of estimated cost

The screens that decide it

Ask the utility this, before you sell it

  1. Is this address served by Block Island Power Company or Pascoag Utility District? Both are excluded from the state regime by statute and run their own tariffs. Block Island publishes a 15 percent cap of 847.4 kilowatts with a current maximum project size of 30 kilowatts, so a normal residential design may not fit there at all.
  2. How much of the 275 megawatt alternating current cap on ground mounted remote net metering remains? The statute requires monthly public reporting, so ask for the current figure rather than assuming headroom, and note all eligible ground mounted systems must be under construction or in operation by 1 July 2030.
  3. What are the numeric penetration thresholds in the screening figures? They appear only as flowchart graphics in the tariff with no extractable text, so they must be read from the document rather than assumed.
  4. Is this project sized under the incentive program or the interconnection tariff? The growth program measures small scale solar nameplate in direct current while the simplified interconnection tier measures export in alternating current, so the same 25 kilowatt number means two different arrays.

Worth knowing before you quote

Rhode Island caps a system above 25 kilowatts at the customer usage measured by the three year average annual consumption over the previous three years, with systems at or below 25 kilowatts exempt from any prior consumption restriction. Excess credit is available between 100 and 125 percent of usage, again with the small systems exempt. The tariff bars a simplified process export limit that depends on an assumed minimum site load: when site load is zero the facility as a whole must still comply.

Source

Rhode Island standards for connecting distributed generation, R.I.P.U.C. No. 2258, The Narragansett Electric Company doing business as Rhode Island Energy, effective 1 September 2022, with net metering at Rhode Island General Laws Chapter 39-26.4

Read and recorded 2026-09-12. Rhode Island has no general interconnection rule binding all utilities. The statute sets net metering policy and interconnection timelines and fee floors statewide, but the operative rulebook is one utility tariff. Block Island Power Company and Pascoag Utility District are excluded by statute from the definition of an electric distribution company and each offers net metering through its own approved tariff, so none of the tiers, fees, screens or timelines below apply at those two addresses.

What to do with this

Check a real address

The rules below are the general case. Run the free check to see which utility serves a specific address, which tier the system lands in, and what to ask.

Run the free check
Installers: keep the answer with the job

GridProjeX holds the project from here, with every value tied to the document it came from and the utility and permit tracks run to permission to operate.

How it works for installers
Utilities: see what applicants are told

The same published rules your applicants read here are the ones your queue sees. GridProjeX is the record both sides work from.

How it works for utilities

Also from CivyxIQ, if they fit what you already do: SolarProjeX for running the crews and the jobs, and Solar Home so the homeowner can follow their own project. Neither is needed to use the checker.