Austin wants your PV and battery installs to work, firefighters want to go home, and you want that green tag on the first try. You can have all three if your rapid shutdown labels and BESS placards are worded right, mounted where inspectors expect, and tough enough to survive Texas sun. This guide is tuned for ATX projects reviewed under the Austin Fire Code aligned with IFC 2024 and NEC rapid shutdown rules. If you build to this checklist, your inspector does not have to squint, your AHJ does not have to guess, and your crew does not have to come back for a label-only reinspection.
What Changed For 2026 In Austin
Austin has adopted the 2024 International Fire Code with local amendments and continues to enforce NEC rapid shutdown for PV under Article 690.12. Austin Energy’s interconnection review expects a directory plaque at service that lists all power sources and disconnect locations, including ESS when present. For stationary lithium battery systems 20 kWh and up, Austin Fire applies IFC Section 1207 with a plan review guideline that calls out energy capacity, chemistry, and where more testing or separation is required. If you are submitting after mid 2025, plan on the latest NEC and IFC cycle being in play. In 2026, inspectors in Austin are expecting high-contrast rapid shutdown placards with the boundary diagram, clear RSD switch labels, DC raceway warnings at the correct spacing, and ESS signage that calls out energized circuits at the door and the disconnects labeled accurately. Do those well and you just made friends at inspection.
Rapid Shutdown Labels That Pass
Rapid shutdown labeling lives and dies on two things: the exact words and the boundary diagram. Get both right and you are ahead of most fails we see.
Required service equipment placard wording under NEC 690.12 and 690.56 should read as follows, with the boundary phrase that matches your system:
Title line: SOLAR PV SYSTEM EQUIPPED WITH RAPID SHUTDOWN
Boundary statement, pick one:
• TURN RAPID SHUTDOWN SWITCH TO THE OFF POSITION TO SHUT DOWN PV SYSTEM. CONDUCTORS OUTSIDE THE ARRAY BOUNDARY REDUCE TO A SAFE LEVEL.
• TURN RAPID SHUTDOWN SWITCH TO THE OFF POSITION TO SHUT DOWN PV SYSTEM. CONDUCTORS INSIDE AND OUTSIDE THE ARRAY BOUNDARY REDUCE TO A SAFE LEVEL.
Location line: RAPID SHUTDOWN INITIATION DEVICE LOCATED: [describe location clearly]
Letter sizes inspectors look for: title at minimum 3/8 inch uppercase, body at minimum 3/16 inch uppercase. All caps reads clean under a headlamp. NEC 2023 no longer hard-codes red for this placard, but nearly every Texas AHJ still expects high-contrast red background with white lettering, reflective. If the rest of your PV labeling is red and this one is not, you are only creating questions at 2 a.m. on a roof. Keep it high-contrast and reflective and you are good.
The boundary diagram is not optional. Show a simple roof outline, draw the array boundary, then indicate with arrows or shading which conductors are de-energized by the rapid shutdown and which are not. That graphic helps firefighters decide where to cut and where to avoid. It also helps your plan reviewer understand what you actually installed.
The RSD Switch And Conduit Markers
Next, locate the rapid shutdown initiation device label. Place a durable, reflective label stating either RAPID SHUTDOWN SWITCH FOR SOLAR PV SYSTEM or PV SYSTEM RAPID SHUTDOWN INITIATION DEVICE at or within 3 feet of the handle or push-button. Keep letters at least 3/8 inch, white text on red background, and mount it where the device can be identified in the dark with a flashlight. If the switch cover can be replaced, put a second label on the enclosure door so it is visible even when the handle is obscured.
For DC raceways and boxes, use repeating warnings along the run. Mark every 10 feet of exposed conduit with WARNING: PHOTOVOLTAIC POWER SOURCE or SOLAR PV DC CIRCUIT if that is what your design calls it. Place labels at turns, at penetrations, and on each junction box or combiner lid. If your conduit color is anything but light, go up a font size. Reflective red with white uppercase text remains the Austin norm. Adhesive-only decals tend to curl on hot south walls, so use wrap-around sleeves or riveted tag plates on metal as needed.
BESS Placard Requirements That Stick
Battery energy storage signs do two jobs: they keep firefighters from making a bad day worse, and they keep inspectors from asking you for another round of field labels. Austin applies IFC Section 1207 for larger stationary systems along with manufacturer instructions and NEC equipment labeling. Your signage package should include the following:
Entrance doors to the ESS room or enclosure get identification that matches the technology. ENERGY STORAGE SYSTEM, BATTERY STORAGE SYSTEM, or CAPACITOR ENERGY STORAGE SYSTEM are acceptable titles. Add ENERGIZED ELECTRICAL CIRCUITS. If the chemistry is water-reactive, include APPLY NO WATER near the main title. Post a current emergency contact number for service or mitigation. If the ESS is outdoors in a walk-in cabinet or on a roof, mount the same identification at the access door.
At the ESS disconnect, mark the disconnecting means with ENERGY STORAGE SYSTEM DISCONNECT or similar. Include nominal battery voltage and available fault current where required by the equipment listing and the electrical engineer. If your project has arc flash labeling in scope, put it here. The point is to identify which handle drops the ESS, and what level of hazard lives behind the door.
At the main service equipment, install a directory plaque that lists all sources on site. List the utility service, PV array, and ESS, with their disconnect locations and the building areas they serve. Include voltages and nominal kW or kWh where appropriate. NEC 705.10 expects a plaque like this for multiple power sources, and Austin Energy’s interconnection review looks for it. When the PV disconnect and ESS disconnect are not grouped, the directory is what saves minutes during an emergency.
For systems at or above 20 kWh, Austin Fire’s plan review wants energy capacity called out, chemistry identified for lithium-ion variants, and clear working space maintained per NEC and manufacturer. If you are over 50 kWh or you have nonstandard chemistries or configurations, expect to provide UL 9540A data or separation distances. That belongs in your plans, but mirroring the essentials on the site signage keeps field crews and inspectors aligned.
Rooftop Access For PV And Rooftop BESS
Rooftops are where label sets go to disappear. Austin wants firefighters to see where they can walk, where they can cut, and how to shut it down. Your rapid shutdown placard already includes a roof diagram with the array boundary. Use that same geometry to locate your RSD switch note, your PV disconnect locations, and any roof access points like ladders, hatches, or exterior stairs. If you install a rooftop ESS, Austin limits those to buildings 30 feet or less above the lowest level of fire department vehicle access. That keeps rooftop batteries off high-rise rooftops without special approvals. Outdoor or rooftop ESS enclosures need working clearances and signage at the access door just like ground enclosures.
Where your AHJ requests roof access markings, post reflective tags at permanent roof ladders or roof hatch landings that repeat RAPID SHUTDOWN SWITCH LOCATION and PV DISCONNECT LOCATION with arrows. If a firefighter climbs up at the back of a building, that quick label keeps them from hunting for a switch while smoke is building.
Materials That Survive Austin Summers
If your letters fade before your punchlist is closed, you are buying your crew a second truck roll. For outdoor PV and ESS signage in Austin, we recommend the following materials and specs:
Use substrates rated for exterior use year round. Anodized aluminum plates, UV-stable engraved phenolic, or subsurface printed polycarbonate bonded to aluminum are proven. For decals on smooth equipment doors, pick a laminate and adhesive system that meets UL 969 for mark permanence and has a high-temperature rating. Reflective films rated for at least 7 years outdoors help first responders see at night and after dusting.
Hardware matters. If the enclosure is not yours to drill, use VHB-style tape only if the surface is prepped and the manufacturer allows it. If the surface permits, back up adhesive with stainless screws or rivets. Conduit labels should be either heat-shrunk sleeves or wrap-around tags that will not let go in heat.
Contrast and colors should be consistent. Red background with white uppercase text reads clean and aligns with what Austin inspectors expect for PV hazard and shutdown information. ESS disconnect labels can be red or yellow background depending on your arc flash scheme, but keep the hazard color coding consistent per site. If you go with a color other than red for the rapid shutdown placard, ensure stark contrast and a reflective finish. Do not mix three different reds from three vendors across the same wall. It looks sloppy and it gets called out.
Mounting Heights And Placement
Codes say visible and durable. Inspectors say stop making me kneel or use a ladder for field labels. Use these Austin-proven targets unless your inspector tells you otherwise:
Service equipment placards and the directory plaque should be mounted on or immediately adjacent to the main service disconnects, at typical eye level. A centerline around 60 inches above finished grade is a reliable target outdoors. Keep them on the face of the cabinet if space allows, or directly to the right of the handles if you are competing with factory decals. Do not hide a critical placard behind a swinging door or inside a fence bay that is not obvious from the street.
The rapid shutdown switch label belongs at or within 3 feet of the switch handle or button. If the switch is part of a multi-switch gang, add an arrow or a small engraved tag on the escutcheon so there is no guessing which actuator is the RSD. Conduit markers should be readable without climbing. For low runs, place labels on the side that faces out, not the side that hugs the wall. For overhead runs, put decals on the vertical faces at intervals so a person on the floor can read them.
ESS room and enclosure identification belongs on the door people actually use. Center it approximately at eye level on the exterior face. If the door has a vision panel, place the message on the solid portion where it will not be blocked by blinds or stickers. On rooftop or yard enclosures, mount the identification on the door and repeat it on one side panel that faces the approach path. The ESS disconnect label sits on the cabinet or fascia immediately next to the disconnect handle or cover, never only inside the door.
Words, Sizes, And Colors You Can Copy
If you want the short version of what the text, sizes, and looks should be for Austin inspections, here it is. Keep everything uppercase, permanent, and reflective for first responder awareness.
| Sign | Exact Wording | Letter Size | Color And Finish | Placement | Material Notes |
|---|---|---|---|---|---|
| Rapid Shutdown Placard | Title: SOLAR PV SYSTEM EQUIPPED WITH RAPID SHUTDOWN. Boundary line as applicable. Location line for initiation device. | Title 3/8 in min, body 3/16 in min, all uppercase | High-contrast, typically red background with white text, reflective | On or adjacent to main service equipment in clear view | Plate or subsurface print, UL 969 durability, mechanical fasteners preferred |
| RSD Switch Label | RAPID SHUTDOWN SWITCH FOR SOLAR PV SYSTEM or PV SYSTEM RAPID SHUTDOWN INITIATION DEVICE | 3/8 in min, uppercase | Red background, white text, reflective | At or within 3 feet of the switch or button | Engraved tag or adhesive with rivets or screws where allowed |
| DC Raceway Warning | WARNING: PHOTOVOLTAIC POWER SOURCE or SOLAR PV DC CIRCUIT | 3/8 in typical, uppercase | Red background, white text, reflective | Every 10 feet, at turns, at penetrations, on enclosures | Wrap-around or sleeve on conduit, subsurface on lids |
| Directory Plaque | List utility service, PV array, ESS with disconnect locations and voltages | 1/4 in typical, uppercase | High-contrast, reflective recommended | At service equipment where first responders land | Engraved or metal plate, weather rated |
| ESS Room Or Enclosure ID | ENERGY STORAGE SYSTEM or BATTERY STORAGE SYSTEM. ENERGIZED ELECTRICAL CIRCUITS. Add APPLY NO WATER if water-reactive. Emergency contact number. | Title 3/4 in typical, body 3/8 in typical | High-contrast, reflective recommended | On entrance door or access panel, eye level | Metal or phenolic plate, UV stable |
| ESS Disconnect | ENERGY STORAGE SYSTEM DISCONNECT with voltage, available fault current, arc flash warning where required | 3/8 in typical, uppercase | High-contrast, hazard color per scheme | On or beside disconnect handle or cover | Durable tag or plate, UL 969 rated |
Boundary Variants Without The Gotchas
Mixed hardware makes boundary wording tricky. If you have module-level power electronics on every panel and your design de-energizes conductors inside and outside the array boundary, use the inside and outside variant. If you only de-energize conductors outside the array and leave energized circuits within the array boundary until the modules discharge, use the outside-only variant. The diagram needs to match the words. If you mix optimizers and a central inverter with a rooftop combiner, label the conductors leaving the boundary in a way that shows which raceway is safe after shutdown. Dual-conduit arrays should have both conduits labeled individually, not just the first ten feet at the eave.
Rooftop ESS Notes You Will Get Asked About
If you put batteries on a roof in Austin, check the building height first. Rooftop LiBESS is limited to buildings that are 30 feet or lower above the lowest level of fire department access. If you qualify, do not skip signage. Post the ESS identification on the cabinet, repeat it at the roof access point, and add the ESS location to the service directory plaque. Maintain clear working space around the unit as required by the manufacturer and electrical code, and do not let a roof screen hide the door labels from a firefighter on the ladder.
How Placards Fail In The Field
We see the same five mistakes cause red tags over and over. Skip these and your odds jump way up.
People miss the boundary diagram on the rapid shutdown placard or use a generic icon that does not match the array shape. That gets you a callout. Another frequent miss is putting the RSD label on the wrong switch in a gang of disconnects. Add an arrow or relocate the label so there is no ambiguity. DC raceway labels only at the first ten feet is a classic reinspection. Mark them every 10 feet and at each box. Directory plaques that do not list the ESS or that put the wrong panel number for the PV disconnect make first responders hunt. Fix the text on day one. Finally, adhesive-only decals on textured powder coat often curl by the time the inspector arrives. Use a plate with screws or a combo of adhesive plus mechanical.
Spec Sheet For Your Plan Set
Copy these spec lines into your drawings and you will save phone calls. Label text to be uppercase with minimum letter heights per NEC 690.12 and 690.56. Rapid shutdown placard to include roof boundary diagram showing controlled conductors. Placards to be high-contrast and reflective. Provide directory plaque at service listing utility, PV, and ESS sources with disconnect locations and voltages. Provide RSD switch label within 3 feet of initiation device. Provide DC conductor labels every 10 feet and at boxes and penetrations. Provide ESS room or enclosure identification with technology name, energized circuits warning, and emergency contact. Provide ESS disconnect labeling with voltage, available fault current, and arc flash warning where required. All labels to be UL 969 rated for permanence, UV resistant, weather rated, and permanently affixed. Mount service and door placards at typical eye level and in direct line of sight to the device or door they describe.
FAQ: Austin Rapid Shutdown And ESS Signs
Do rapid shutdown labels have to be red in Austin?
NEC 2023 does not hard-code red, but Austin inspectors still expect high-contrast and usually red with white reflective text for PV hazard and shutdown labels. If you stick with red and reflective, you will not be arguing color theory at inspection.
What size letters do inspectors expect on the rapid shutdown placard?
Use a 3/8 inch minimum for the title line and 3/16 inch minimum for the body lines, all uppercase. Larger is fine as long as the placard fits on the gear without covering factory information.
How close does the RSD label have to be to the switch?
Place it at or within 3 feet of the handle or button. If multiple switches share a panel, add an arrow or a small tag at the switch itself.
How often should I label DC conduit?
Every 10 feet along the run, at each turn, at each penetration, and on each junction or combiner box lid.
What goes on the directory plaque?
List every power source on site, where its disconnect is, and the voltages. Include utility, PV array, and ESS. The idea is that a firefighter can read one plaque and know exactly where to go.
What does Austin want on BESS doors?
A clear title like ENERGY STORAGE SYSTEM, ENERGIZED ELECTRICAL CIRCUITS, chemistry information if needed, APPLY NO WATER if the chemistry is water-reactive, and a current emergency contact number.
Can I put Li-ion batteries on a roof in Austin?
Only if the building is 30 feet or lower above the lowest fire department access, and the system meets clearance and listing requirements. You still need the enclosure labeled and the disconnect identified.
Ready For An Inspection-Ready Placard Pack?
If you want rapid shutdown labels, directory plaques, conduit markers, and ESS signs that match Austin’s 2026 expectations, we build them daily. We design the roof boundary diagram to your layout, size the letters correctly, spec UL 969 materials that laugh at August heat, and pre-drill plates so your crew installs in minutes. Send your one-line, site plan, and gear photos. We will kick back an Austin-ready placard kit with mounting hardware and a layout sheet your inspector will actually like.