Arizona Registrar of Contractors

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Notice: Arizona Solar Contractors

Solar Energy Device Warranties

Most contractors are aware that pursuant to A.R.S. § 32-1170.01 it is unlawful to install, alter, or repair a solar device without first qualifying as a solar contractor. Contractors should also be aware that A.R.S. § 44-1762 requires those who manufacture, furnish for installation, or install a solar energy device to provide consumers a written statement of (1) warranty, (2) responsibilities assumed or disclaimed and (3) performance data of the solar energy device and its components?

The form of this statement is subject to approval by the Registrar of Contractors and a copy of the approved statement is to be kept on public file with the agency.

Questions regarding these written statements or their filing with the Registrar of Contractors should be directed to the licensing department at 602-542-1525.

Solar Contracting

With over 300 annual days of sunshine, Arizona is establishing itself as a leader in the solar industry. With such an abundance of this great natural resource, it is no surprise that Arizona is fast becoming a key player in the growth of this important industry. Many local, state, and federal government entities are incentivizing homeowners to utilize new solar technologies.

The Arizona Registrar of Contractor plays a vitally important role in ensuring that contractors who conduct business in this growing industry are properly licensed and meet all regulatory, experience and training requirements necessary to protect the public from poor workmanship and unscrupulous activities.

Proper licensure is the first step. The table below reflects the current classifications and requirements necessary for solar licensure as defined by the Registrar of Contractors. In order to perform solar installation in the state of Arizona, contractors must hold at least one of the following licenses:

Arizona Registrar of Contractors
Solar Licensing Requirements
License Classification Description Experience Requirements
R-4, C-74, CR-74 Boilers, Including Solar 4 Years Journeyman
R-37, C-77, CR-77 Plumbing, Including Solar 4 Years Journeyman
R-37R, C-78, CR-78 Solar Plumbing Liquid Systems Only 6 Months Journeyman
R-39, C-79, CR-79 Air Conditioning And Refrigeration Including Solar 4 Years Journeyman
A-19, B-6, KA-6 Swimming Pools, Including Solar 4 Years Management of General Swimming Pool Contracting.
A-17, R-11, C-11, CR-11 Electrical (including solar electric) 4 Years Journeyman
A-General, B-4 General, KA-General General Engineering (including solar electric) 4 Years Management of General Engineering

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Work Allowed for Classifications

C-04BOILERS, INCLUDING SOLAR
Installation and repair of steam and hot water boilers. If necessary, a new circuit may be added to the existing service panel or sub-panel. Excluded is the installation of a new service panel or sub-panel. This scope includes the C-4R subclassification.


K-74BOILERS, STEAMFITTING AND PROCESSPIPING, INCLUDING SOLAR
This classification allows the scope of work permitted by the commercial L-74 Boilers, Steamfitting and Process Piping, Including Solar and the residential C-4 Boilers Including Solar licenses.


L-74BOILERS, STEAMFITTING AND PROCESS PIPING, INCLUDING SOLAR
Installation, alteration, and repair of steam and hot water systems and boilers including solar. Also included are chimney connections, flues, refractories, burners, piping, fittings, valves, thermal insulation and accessories; fuel and water lines from source of supply to boilers; process and specialty piping and related equipment; pneumatic and electrical controls.
If necessary, a new circuit may be added to the existing service panel or sub-panel.
Excluded is the installation of a new service panel or sub-panel.


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C-37PLUMBING, INCLUDING SOLAR
Installation and repair of water and gas piping systems, fire protection systems, and sewage treatment systems. Included are all fixtures, vents, and devices common to the industry, as well as solar applications. This scope includes all C-37R subclassifications.


K-77PLUMBING INCLUDING SOLAR
This classification allows the scope of work permitted by the commercial L-77 Plumbing Including Solar and the residential C-37 Plumbing Including Solar licenses.


L-77PLUMBING INCLUDING SOLAR
Installation, alteration, and repair of all plumbing including solar, when performed solely within property lines and not on public easements or right-of-ways except as hereinafter provided.
Installation, alteration, and repair of all piping, fixtures and appliances related to water supply, including pressure vessels and tanks (excluding municipal or related water supply systems); venting and sanitary drainage systems for all fluid, semi-fluid, and organic wastes; septic tanks and leaching lines; roof leaders; lawn sprinkler systems; water conditioning equipment; piping and equipment for swimming pools.
Also included are piping, fixtures, appliances, and pressure vessels for manufactured and natural gases, compressed air and vacuum systems, petroleum, fuel oil, non-potable liquids, hot water heating and hot water supply systems operating at pressures not exceeding 30 PSIG or temperatures not exceeding 220° F; steam heating and steam supply systems not exceeding 15 PSIG operating pressure; gas or oil fired space heaters and furnaces excluding duct work. Piping for water cooling systems, excluding the refrigerant piping and equipment. Testing and balancing of hydronics systems.
Sewer, gas, water lines, and connections from structure to the nearest point of public supply or disposal may cross public or private easements or be installed within private easements. Pipe installed across public property may not be increased in size or make any other connection between the point of exit from private property to point of connection at public supply or disposal. These lines shall not be installed parallel to main lines in public easements or right-of-ways.


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C-37R SOLAR PLUMBING LIQUID SYSTEMS ONLY


K-78SOLAR PLUMBING LIQUID SYSTEMS ONLY
This classification allows the scope of work permitted by the commercial L-78 Solar Plumbing Liquid Systems Only and the residential C-37R Solar Plumbing Liquid Systems Only licenses.


L-78SOLAR PLUMBING LIQUID SYSTEMS ONLY
Installation, alteration, and repair of solar water heating systems operating at temperatures not exceeding 220° F, including thermosyphon, direct (open loop), and indirect (closed loop),but excludes air as a transfer medium.
Includes installation of collectors, storage and expansion tanks, heat exchangers, piping valves, pumps, sensors and low voltage controls which connect to existing plumbing and electrical stub-outs at the water tank location.
Installation of solar water heating systems for swimming pools which tie into and operate from the conventional pool systems, but excludes all non-solar plumbing, electrical and mechanical systems and components.
Installation of back-up and auxiliary heating systems only when such systems are included in the original contract and when such systems are an integral part of the solar collector or storage equipment.


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C-39AIR CONDITIONING AND REFRIGERATION, INCLUDING SOLAR
Installation and repair of comfort air conditioning systems, including refrigeration, evaporative cooling, ventilating, and heating with or without solar equipment. Installation and repair of machinery, units, accessories, refrigerator rooms, and insulated refrigerator spaces, and controls in refrigerators. If necessary, a new circuit may be added to the existing service panel or sub-panel. Excluded is the installation of a new service panel or sub-panel. This scope includes all C-39R subclassifications.


K-79AIR CONDITIONING AND REFRIGERATION INCLUDING SOLAR
This classification allows the scope of work permitted by the commercial L-79 Air Conditioning and Refrigeration Including Solar and the residential C-39 Air Conditioning and Refrigeration Including Solar licenses.


L-79AIR CONDITIONING AND REFRIGERATION INCLUDING SOLAR
Installation, alteration, and repair of refrigeration and evaporative cooling systems, including solar.
Installation, alteration, and repair of heating systems of "wet", "dry" or radiant type. "Wet" systems include steam, or hot water boilers and coils, or baseboard convectors and are limited to 30 PSIG operating pressure of 220° F for hot water and 15 PSIG operating pressure for steam. Dry systems include gas fired furnaces and space heaters.
Installation, alteration, and repair of ventilation systems.
Installation of these systems include duct work, air filtering devices, water treatment devices, pneumatic or electrical controls, and control piping. Thermal and acoustical insulation, vibration isolation materials and devices, liquid fuel piping and tanks, and water and gas piping from service connection to equipment it serves. Testing and balancing of refrigerant, cooling and heating circuits, and air handling systems.
If necessary, a new circuit may be added to the existing service panel or sub-panel. Excluded is the installation of a new service panel or sub-panel.


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A-19SWIMMING POOLS, INCLUDING SOLAR
Construction, service, and repair of swimming pools and spas, with or without solar water heating devices, including water and gas service lines from point of service to pool equipment, wiring from pool equipment to first readily accessible disconnect, pool piping, fittings, backflow prevention devices, waste lines and other integral parts of a swimming pool, spa and attached solar water heating device.

Also included are swimming pool accessories, covers, safety devices, and fencing for protective purposes, if in the original contract.


B-06GENERAL SWIMMING POOL CONTRACTOR, INCLUDING SOLAR
The scope of work allowed in this classification is the same as B-5 (including all B-5R subclassifications) with the inclusion of solar heating devices.


KA-06DUAL SWIMMING POOL CONTRACTOR INCLUDING SOLAR
This classification allows the scope of work permitted by the commercial A-19 Swimming Pools, Including Solar and the residential B-6 General Swimming Pools, Including Solar licenses.


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A-17ELECTRICAL AND TRANSMISSION LINES
Installation, alteration, and repair of transmission lines on public right-of-ways, including erection of poles, guying systems, tower line erection, street lighting of all voltages, and all underground systems including ducts for signal, communication, and similar installations. Installing transformers, circuit breakers, capacitors, primary metering devices and other related equipment of all electrical construction is included.

All electrical systems of less than 600 volts on or inside a building are excluded.


C-11ELECTRICAL
Installation and repair of electrical systems.


K-11ELECTRICAL
This classification allows the scope of work permitted by the commercial L-11 Electrical and residential C-11 Electrical licenses.


L-11ELECTRICAL
Installation, alteration, and repair of any wiring, related electrical material and equipment used in the generating, transmitting, or utilization of electrical energy less than 600 volts, including all overhead electrical wiring on public right-of-ways for signs and street decorations, and all underground electrical distribution systems of less than 600 volts serving private properties.
Installation, alteration, and repair on other than public right-of-ways of all outside, overhead, and underground electrical construction and all wiring in or on any building of less than 600 volts.


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A-GENERAL ENGINEERING
Construction in connection with fixed works, including streets, roads, power and utilities plants, dams, hydroelectric plants, sewage and waste disposal plants, bridges, tunnels, and overpasses. Also included are the scopes of work allowed by all of the other engineering classifications, A-3 through A-21.


B-04GENERAL RESIDENTIAL ENGINEERING CONTRACTOR
Construction and repair of appurtenances to residential structures. This scope includes all B-4R subclassifications.

Additional Scope Information (From "Rules" R4-9-101 Definitions Page 1)
Appurtenances means all structures and improvements subordinate to a residence within residential property lines, excluding the residential structure itself, such as driveways, fences, patios, swimming pools, landscaping, sport courts and gazebos.


KA-DUAL ENGINEERING
This classification allows the scope of work permitted by the commercial A- General Engineering and the B-4 General Residential Engineering licenses.


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CR-42ROOFING
This classification allows the licensee to apply or install weatherproofing (i.e. asphaltum, pitch, tar, felt, glass fabric, or flax) or roof accessories (i.e. flashing, valleys, gravel stops, or sheet metal) as required for the licensee to install or repair:
1. Roof tile
2. Shingles
3. Shakes
4. Slate
5. Metal roofing systems
6. Urethane foam
7. Roof insulation or coatings on or above the roof deck
This classification allows the licensee to replace up to three sheets (96 square feet) of plywood on the roof substrate; and install new or replace existing skylights where it does not require changes to the roof framing or roof structure.
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Residential and Commercial General Contracting and Remodeling Licenses may contract for solar installations.  However, all work pertaining to the installation must be subcontracted to a properly licensed solar plumbing, air conditioning, boiler, electrical or swimming pool contractor.  An exception is that the A-General, B-4 General and KA-Dual Engineering Licenses may perform solar installations.

Roofing tile that function as solar collectors must be installed by a CR-42, roofing contractor. However, connection of these tiles to the electrical system can only be performed by a licensed electrical contractor.

Additionally, any devices (solar or otherwise) mounted on the roof that significantly impacts, may compromise the roof components or may void the existing roof warranty, may require inspection and/or installation by a licensed roofing contractor.

Always ensure that the contractor you hire to perform solar related projects is licensed through the Arizona Registrar of Contractor. Check the status of a Contractor with the Registrar of Contractors.


If you have additional questions you may contact the ROC at 1-877-692-9762.

Testing Requirements

Contractors Business Management Exam and Trade Exam

Statute/ Rule Reference

R4-9-102, R4-9-103, R4-9-104.
Article 4. Qualification of Solar Contractors.
  • § 32-1170. Definitions
  • § 32-1170.01. Installation, alteration or repair of solar device without qualification as solar contractor prohibited.
  • § 32-1170.02. Qualification Examination
  • § 44-1762. Solar energy device Warranties: Installation standards; Inspection.

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