66-1267. Determination of appropriate size of a customer-generator's system; export limiting devices required, when. (a) For customer-generators that began operating a renewable energy resource under an interconnect agreement with the utility prior to July 1, 2014:

(1) Such utility shall allow:

(A) Residential customer-generators to export electricity subject to net metering up to 25 kilowatts; and

(B) commercial, industrial, school, local government, state government, federal government, agricultural and institutional customer-generators to export electricity subject to net metering up to 200 kilowatts.

(2) Nothing in this act shall be construed to prevent such customer-generators from installing additional renewable energy resources after July 1, 2014, that will generate electricity pursuant to the restrictions contained in paragraph (1).

(b) For customer-generators that begin operating a renewable energy resource under an interconnect agreement with the utility after July 1, 2014, such utility shall allow customer-generators to export electricity subject to net metering up to 150 kilowatts alternating current.

(c) Customer-generators shall appropriately size their export capacity to their expected load as follows:

(1) (A) (i) Divide the customer-generator's historic consumption in kilowatt-hours for the previous 12-month period by 8,760; and

(ii) divide the quotient calculated pursuant to paragraph (1)(A)(i) by a capacity factor of 0.144; or

(B) if the customer-generator does not have historic consumption data that adequately reflects the customer's consumption at such premises, the customer-generator's historic consumption for the previous 12-month period shall be 7.15 kilowatt-hours per square foot of conditioned space; and

(2) round up the quotient calculated pursuant to paragraph (1)(A)(i) or the amount determined pursuant to paragraph (1)(B) to the nearest standard size as follows:

(A) Between two kilowatts alternating current power and 20 kilowatts alternating current power, round up to the nearest two kilowatts alternating current power increment; and

(B) between 20 kilowatts alternating current power and 150 kilowatts alternating current power, round up to the nearest five kilowatts alternating current power increment.

(d) For customer-generators that operate a renewable energy resource under an interconnect agreement with the affected utility on or after January 1, 2026:

(1) The generating capacity of a customer-generator's renewable energy resource as approved by the affected utility shall not exceed export capacity by more than 50%; and

(2) energy storage capacity, including electric vehicles or other portable energy storage devices, shall not be included in any sizing formulas unless the energy storage device has the ability to add export capacity and is not part of an export limited system.

(e) For customer-generators that operate a generation resource designed to export an amount of power that differs from the system's generating capacity:

(1) The customer-generator shall own and maintain any necessary export limiting device;

(2) protections shall be in place to restrict the export limiting device settings to qualified persons;

(3) the utility shall have the option to require a witness test of the export limiting device's function or set points prior to granting permission to operate;

(4) the export capacity of the system shall not be increased without prior approval from the utility;

(5) the customer-generator shall allow the utility to perform periodic witness testing of the export limiting device's function or settings upon request;

(6) if the export limiting device's settings are incorrect or if the device fails to limit the export of power below the designed export capacity for more than 15 minutes in any single event, the customer-generator shall cease operation of the system until repair or reprogramming of the limiting device is completed; and

(7) the utility shall not restrict the brand or model of the limiting device if the device is approved by the generator's manufacturer or is underwriter laboratories listed to perform such operations in conjunction with the customer-generator's system.

History: L. 2009, ch. 141, § 12; L. 2014, ch. 68, § 4; L. 2024, ch. 60, § 8; July 1.