City of Hawthorne

A city address is usually permitted by the city, not the county — but not always, and some authorities keep building and hand electrical to someone else. Getting this wrong costs the whole submittal, because every requirement below belongs to whoever actually holds jurisdiction. Check the overlays in the same pass: an HOA, a historic district, a windstorm certification or a system-size cap can reshape the design, and all of them are cheaper to find now than after the array is laid out.

• Is this authority the AHJ for residential solar at this address? Yes 95% · department page
• What does this authority permit itself, and what does it delegate? Both 88% · AHJ guide (LACoFD)
• Is a permit required for a residential rooftop PV system? Yes 92% · department page
• Is there a separate electrical permit, or is it combined? Combined 68% · department page
• Is there a system-size cap on residential generation? No published cap on residential PV generation size was located. LACoFD does impose ESS capacity caps at R-3/R-4 occupancies: 20 kWh (nameplate) maximum per individual ESS unit, and 80 kWh maximum aggregate energy capacity per site (and per specific location type on the site). 82% · AHJ inspection checklist (LACoFD)

Several authorities require the electrical permit to be pulled by a licensed electrician, or require the contractor to be registered with them BEFORE applying. Registration is not same-day. This is second on the list rather than fourth because it is the step most likely to stop the job before the drawings matter.

Nothing recorded for City of Hawthorne on this step yet — 3 questions checked and found unpublished. The guidance above is general.

Almost everywhere wants a site plan, a one-line or three-line electrical diagram, equipment cut sheets with listings, and a structural attachment detail. Build it against the published checklist rather than the last jurisdiction you worked in — the checklist is what the reviewer marks against.

• What documents make up a complete submittal? Base PV: SolarAPP+ standardized submittal (obtain a SolarAPP+ Approval ID, then submit through the city's Tyler EnerGov Citizen Self-Service portal). Where an ESS/BESS or BIPV is included, LACoFD additionally requires an ESS Scope-of-Work note (unit count/type/chemistry, per-unit and total kWh capacity, unit locations) and a Disconnect Schedule identifying every power-source disconnect. 68% · AHJ guide (LACoFD)
• Is a site plan required, and what must it show? Yes for ESS/BIPV portions: LACoFD requires a site plan showing quantity/names/locations of ESS units and graphic locations of all utility meters, AC & DC disconnects, inverters, automatic relays, load centers, and rapid-shutdown initiation devices. A site plan is also the standard input required by the SolarAPP+ process the city has adopted for base PV, though Hawthorne's own page does not itself spell out site-plan content. 62% · AHJ guide (LACoFD)
• Is a one-line / three-line diagram required? Yes (for ESS/BIPV plan sets reviewed by LACoFD, graphic locations of disconnects/inverters/relays function as a one-line-style diagram; SolarAPP+, which the city uses for base PV, also requires an electrical/one-line diagram as a standard input). 58% · AHJ guide (LACoFD)

Most authorities now take the whole application through a portal, and several states cap or constrain what a residential solar permit may cost. Check whether plan check is billed separately before you quote the job.

• Which permit portal does this authority use? Tyler Technologies EnerGov 'Citizen Self Service' (CSS) portal at hawthorneca-energovweb.tylerhost.net, paired with SolarAPP+ (gosolarapp.org) specifically for residential solar, which issues an Approval ID used to unlock the streamlined permit in the CSS portal. 95% · department page
• Can the whole application be completed online? Yes 85% · department page

Interconnection is a separate process from the permit and usually the longer pole. Where the utility does not depend on the permit being issued, running both at once is the single biggest saving available on a residential job.

• Which utility handles interconnection here? Southern California Edison (SCE) 92% · department page (document listing)

The NEC edition a jurisdiction enforces is often a cycle behind the newest one published, and local amendments sit on top of it. Rapid shutdown, conductor sizing and labelling all change between editions, so the edition in force is the first thing to establish, not the last.

• Which NEC edition is in force? 2023 NEC, adopted statewide as the 2025 California Electrical Code (Title 24, Part 3), effective 1 January 2026. 60% · state adopting agency page
• Which building code edition is in force? 2025 California Building Code (Title 24, Part 2), effective 1 January 2026 statewide. 58% · state adopting agency page
• Which fire code edition is in force? 2023 Los Angeles County Fire Code (LACFC) -- a locally-amended version of the 2022 California Fire Code -- per LACoFD, which holds fire-code authority for Hawthorne as a contract city. 75% · AHJ guide (LACoFD)
• Are there local amendments to any of the above? Yes 72% · AHJ guide (LACoFD)
• What is the installation judged against? Base PV/electrical work is judged against the state-adopted CBC/CRC/CEC family in force at permit issuance (2022 cycle through 31 Dec 2025; 2025 cycle -- 2023 NEC basis -- from 1 Jan 2026). ESS, BIPV, and all power-source disconnects/placarding are additionally judged against the 2023 Los Angeles County Fire Code (locally amended 2022 CFC) Sections 509, 603.4, 1207.11, and 2022 CEC Sections 225.37, 230.70, 230.85, 705.10 and 705.20, per LACoFD. 68% · AHJ inspection checklist (LACoFD)

Ridge setbacks and roof access pathways are fire-service requirements and they constrain the array layout. They are the most common cause of a redesign after the fire department comments on a plan set.

Nothing recorded for City of Hawthorne on this step yet — 1 question checked and found unpublished. The guidance above is general.

Which rapid-shutdown rule applies follows directly from the NEC edition in force, and the initiation device has to be at a location the fire service can reach and identify. This is inspected, and it is labelled.

• Is rapid shutdown required, and to which NEC edition? Yes, rapid shutdown is required. LACoFD's placarding system explicitly requires a placarded initiation device for 'Rapid Shutdown' or 'Hazard Control System' functions on any PV/BIPV system that has one, citing 2022 CEC Sections 705.10 and 705.20 (as of the 2023-09-01 dated guide; the state has since moved to the 2023 NEC/2025 CEC cycle effective 1 Jan 2026, which retains the equivalent rapid-shutdown requirement at NEC 690.12). 72% · AHJ guide (LACoFD)

The NEC sets a baseline for permanent markings at the service equipment and the disconnecting means. On top of that, an authority may specify its own wording, and the utility may specify more again. Where any of them writes its own text, a generic off-the-shelf label set will not pass — this is the detail most often fixed on a return visit.

• Which placards does this authority require at the service equipment? LACoFD's 'Electrical Power Source Disconnect Placarding System': (1) an Exterior Placard reading 'F.D. -- ELECTRICAL BLDG DISCONNECT / # X of Y' placed on/adjacent to each panel, enclosure, or standalone disconnect switch that must be operated; and (2) a smaller Panel-Interior Placard reading '#X' identifying specific breakers/switches inside a panel when multiple switches in one panel must be operated. 95% · AHJ guide (LACoFD)
• Does the authority specify placard wording of its own? Yes 95% · AHJ guide (LACoFD)
• Does it specify letter height, colour or material? Exterior placards: minimum 2 in. tall x 3.5 in. wide, weather-resistant plastic, verbiage engraved; red letters engraved into a yellow background; solid all-capitals Arial font minimum size 24 ('F.D.' and '#X of Y' bold, minimum size 28). Panel-interior placards: minimum 7/16 in. tall x 3/4 in. wide, same material/color, solid all-capitals bold Arial minimum size 24. Attachment by permanent, material/weather/surface-compatible epoxy. 95% · AHJ guide (LACoFD)
• Is a site plan / facility map placard required, and what must it show? Not a standalone 'facility map' placard, but a functionally equivalent 'Disconnect Schedule' is required on plan sets submitted to LACoFD: a table listing every power source (utility, ESS, PV, other), the minimum number of disconnects, the '#X of Y' designation used on the placards, and the disconnect type/rating for each. At the panel itself, the Exterior/Panel-Interior placard set (q38-40) performs the field-identification role that NEC 705.10 calls for. 80% · AHJ guide (LACoFD)
• Where must the labels be placed? Exterior placards: on or immediately adjacent to each panel/enclosure or standalone disconnect switch that must be operated (additional placards required where an enclosure houses multiple panels, or more than the 'Main' must be operated). Panel-Interior placards: inside the panel, next to the specific switches/breakers, when multiple switches within one panel must be operated. All placarded devices must be accessible from the exterior of the structure and located within 6 feet of the main service panel on the same wall plane. 88% · AHJ guide (LACoFD)

Where the AC disconnect must sit relative to the meter is usually the utility's rule, not the building department's. Battery storage frequently carries its own permit, its own inspection and its own fire conditions.

• Where must the AC disconnect be, relative to the meter? Electrical disconnection means and rapid-shutdown activation devices for all power sources (utility, PV, ESS, etc.) serving a structure must be on the exterior, within 6 feet of the main service panel, on the same wall plane, not separated from one another by walls/gates/fences/vegetation/architectural features (2023 LACFC Section 509.3), unless the fire code official grants a case-by-case exception (in which case alternative signage is required). 78% · AHJ inspection checklist (LACoFD)
• Must equipment be on a specific approved list? For ESS: yes -- individual units (or all components) must carry UL 9540 listing, and inverters must carry UL 1741 listing (or be covered within the UL 9540 listing). Units listed/labeled solely for utility or commercial use may not be used residentially. No equivalent city-published approved-equipment list was found for base PV modules/inverters beyond standard UL listing implied by SolarAPP+/code compliance. 80% · AHJ inspection checklist (LACoFD)
• Are batteries permitted, and under what conditions? Yes, with detailed conditions: ESS allowed in detached garages, in attached garages (if separated from living/sleeping space per CRC R302.6), or outdoors/on the exterior wall (subject to setbacks). Prohibited inside dwelling units/ADUs, sleeping units, spaces opening into sleeping rooms, closets, bathrooms, basements, non-garage accessory structures, and vaults. Individual units separated by 3 ft minimum; outdoor/exterior-wall units kept 3 ft from openings/vents, 5 ft from lot lines/public ways/other buildings/combustibles, 10 ft from vegetation. Impact protection (bollards) required where subject to vehicular impact. Max 20 kWh per unit, 80 kWh aggregate per site. UL 9540/1741 listing required. Detection/notification required for garage installations. 92% · AHJ guide (LACoFD)
• Is there a separate ESS permit or inspection? Yes -- ESS installations with a capacity greater than 3 kWh require a separate LACoFD Fire Prevention Division plan submittal (unless state-exempted) and a separate LACoFD field inspection and fee, in addition to whatever the City's Building & Safety Division issues/inspects. 90% · AHJ inspection checklist (LACoFD)

Booking is a portal, a phone call or an email depending on the authority, and the notice required is rarely zero. Book before the work is finished rather than after — the lead time, not the work, is usually what sets the date.

• How is an inspection booked? Portal 90% · department page
• How much notice is required? Roughly 1-2 business days ahead, per the city's posted scheduling table (e.g., a request submitted Monday is tentatively scheduled for Wednesday; a Friday request for the following Monday or Tuesday depending on whether Fridays are 'closed' that week). 70% · department page
• Are same-day or AM/PM windows offered? No fixed AM/PM window is offered; the page states inspection times 'may vary' and instructs applicants to call before 9 a.m. on the inspection date to get the exact time slot. 72% · department page

Some authorities inspect their own solar work; some delegate it, and a few do not inspect the PV equipment itself at all. Who is coming determines what they will look at.

• Does this AHJ perform its own final solar inspection? Delegated 85% · AHJ inspection checklist (LACoFD)
• If delegated, to whom? Los Angeles County Fire Department (LACoFD), Fire Prevention Division -- for ESS/BESS, BIPV, and electrical power-source disconnect placarding only. 85% · AHJ inspection checklist (LACoFD)

A rough-in or mid-roof inspection, where one is required, has to happen before the work it covers is closed up. Missing a stage means opening something back up, and it is the most expensive kind of correction.

Nothing recorded for City of Hawthorne on this step yet — 2 questions checked and found unpublished. The guidance above is general.

The approved plan set, the permit, and the equipment listings should be on site and reachable. Inspectors routinely verify that installed equipment matches what was approved, and that the labels are the ones the plan set promised.

• Is there a published inspection checklist? Yes 95% · AHJ inspection checklist (LACoFD)
• What must be on site at inspection? For the LACoFD-inspected scope: digital proof of the construction permit obtained via the expedited permitting process (SolarAPP+ or comparable), any inspection checklist provided with that permit, the disconnect placarding already installed, and confirmation that LACoFD Fire Prevention fees have been paid (unpaid invoices cause cancellation). Equipment cut/spec sheets and the full installation manual must be immediately available upon the inspector's request. 85% · AHJ inspection checklist (LACoFD)
• Does the inspector verify labels and listings? Yes -- for the LACoFD-inspected scope, the checklist explicitly requires confirming UL 9540 (ESS) and UL 1741 (inverter) listings, and confirming the disconnect placarding is in place, as prerequisites the inspector checks. 82% · AHJ inspection checklist (LACoFD)

Passing gives you a final or an equivalent sign-off. That is not the same as permission to operate: PTO comes from the utility, and who tells the utility the inspection passed varies. A system left switched off for weeks is usually waiting on this handover.

• What is issued on pass? Letter 55% · AHJ inspection checklist (LACoFD)