Building Department

Residential Solar Photovoltaic (PV) System


Plan Submittal Checklist
Based on 2014 NEC

This checklist is only a basic list of items needed to begin a solar PV system plan review and is not all inclusive. Having all the items listed on this checklist does not guarantee a permit will be issued and any additional plans, information, and/or requirements may be requested or required by Riverton City at any time. All plans need to be electronically submitted, email them to Chief Building Official Mark Smith at msmith@rivertoncity.com.  Permit applications are available online, here.

  1. Site plan: A detailed site plan showing the location of the home, electrical meter panel, any back-fed sub-panelboards, and all PV system components on the property is required. Please provide total Square footage of Solar panels to be installed. Solar Panel layout must show all required Utah fire clearances. All roof layouts will be reviewed and approved by UFA/Riverton City Fire Marshal Dan DeVoogd. All ground arrays must meet min City setbacks for Accessory Structures.
  2. Mounting system: Provide detailed information on the module mounting system and also the weight of all components on the roof. The support manufacture specs must also specify the required support spacing based on Riverton City wind and snow loads, Exposure C, 90 miles per hour three second gust, 43 PSF ground snow load. Please note on plans if the home has roof rafters or engineered trusses. Also note the type of the roof covering (shingles, metal, or tile) and how many layers of the covering there are. Must include letter from Structural Engineer with Utah stamp stating that roof will support added load of Solar Panels or footing design for ground array.
  3. One-line diagram: A detailed one-line diagram is required and must show: the type of PV system being installed (a single inverter system with one or more strings of modules connected in series, a micro inverter system, or an AC module system), the exact number and layout of modules and how they are connected together (in series or in parallel), all wire types, all wire sizes, conduit types and sizes, detailed info on the grounding wiring and connections, the locations of all circuits and system components on or in the house, and the ratings of all fuses or breakers. Provide colored detail page of all required labels for all components of PV system.
  4. Elect. panel to be backfed: Note which home electrical panel the PV system will backfeed thru and give location and rating of panel. Please provide pictures of main and sub panels that will be backfed. Make sure the pictures include all rating labels and interiors of cabinets.
  5. Module spec sheets: Provide the PV module (solar panels) spec sheets showing the modules’ STC rated watts (Pmp), volts (Vmp), amps (Imp), open circuit voltage (Voc), and short circuit current (Isc). Modules must be listed UL 1703.
  6. Inverter spec sheets: Provide the inverter manufacture spec sheets showing the amount of watts and volts the inverter can safely handle, and also noting what the inverter’s max rated AC output amps and voltage is. Utility tied inverters must be listed as “utility interactive” meeting UL 1741, and have ground fault protection.
  7. Total array power: (This is not required for systems with micro inverters) Provide the total amount of watts, amps, volts, open circuit voltage (Voc at the coldest possible outside temperature-see NEC 690.7), and short circuit current that the array can produce.
  8. System components: Provide information on the different types of components that will be used in the system and how they are to be installed. Also show that all equipment is listed and rated for the type of voltage (AC or DC), amount of voltage, and the amount of current that it could be subjected to.