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Solar work runs on inspection dates. Tell us the equipment, the environment, and the quantity, and you will hear back from someone who can price it. During business hours, most quote requests get a reply within 20 minutes.
Request a quote below or call 1-800-428-0095
What Goes on a Solar Inverter Nameplate
Solar inverter nameplates hold what a technician or inspector needs without opening the enclosure. The inverter manufacturer and the listing standard set the exact content. Most plates carry:
- Manufacturer name, model number, and country of origin
- AC and DC ratings for voltage, current, frequency, and continuous output power
- Listing marks and the standard the unit was tested against
- Serial number and date code, often as a barcode, QR code, or Data Matrix, as well as text
- Warning text for stored energy, arc flash, and more
Ultimately, the data has to stay readable for the life of the equipment. An unreadable plate at the ten-year inspection is a compliance issue and replacing it in the field on an energized array costs far more than the plate did.
UL 1741 Nameplates and the Codes Behind PV Labeling
UL 1741 nameplates carry the markings required by UL 1741, the Standard for Inverters, Converters, Controllers, and Interconnection System Equipment for Use with Distributed Energy Resources. Supplement SA covers the smart inverter grid support functions written into California Rule 21. Supplement SB, added in the 2021 edition, sets the test methods for demonstrating conformance with IEEE 1547-2018 using the procedures in IEEE 1547.1-2020. More states now require SB listing for interconnection approval.
Durability is covered separately. UL 969, the Standard for Marking and Labeling Systems, sets the permanence and legibility criteria and the test procedures a marking system has to pass. NEC 110.21(B) requires field-applied hazard markings to be permanently affixed, not handwritten, and durable enough to withstand the environment involved. That last requirement is what pushes outdoor equipment away from paper and ordinary printed labels.
Rapid shutdown labeling moves between code cycles. Under the 2017 and 2020 NEC the building placard sits in 690.56(C), and the required colors depend on which variant applies. Under the 2023 NEC it moved to 690.12(D), the reflective requirement was dropped, and no specific color is mandated so long as the text contrasts with the background.
The label at the rapid shutdown switch itself has not changed: reflective, capitalized, minimum 3/8 inch, white on red.
Adopted NEC editions differ by state and sometimes by jurisdiction. Wording that passes in one county can draw a correction in the next. Send us the label schedule from your plan set and we will produce to the wording and format on it.
Solar Panel ID Labels and Module-Level Marking
Solar panel ID labels identify the module. The nameplate carries the electrical characteristics and the qualification standards the panel was tested to, such as the IEC 61215 and IEC 61730 series. A label ties that panel to a production batch and a warranty record.
A utility scale array can carry tens of thousands of unique numbers. They must be correct, sequential, and scannable on the first pass. We produce consecutive numbering, barcodes, QR codes, and Data Matrix markings through embossing, stamping, photo anodizing, and digital printing, and we proof the sequence before the run.
Materials and Marking Processes That Survive Outdoors
How the mark is held to the metal decides how long it lasts. Surface printing wears off. Marks below the surface do not. Modules and inverters are specified for decades of service. The identification on them should be too. We work in anodized aluminum, stainless steel, brass, galvanized steel, and industrial plastics. Tell us where the part lives and what it is exposed to, and we will recommend the material, process, and attachment method.
| Process | How the Mark Is Held | Outdoor Durability | Typical Fit on a PV Site |
|---|---|---|---|
| Photo Anodized Aluminum | Image sealed beneath the anodic layer, with no ink or raised surface | 20+ years outdoors | Inverter nameplates, module labels, barcodes that must scan for decades |
| Etched Metal | Design cut into the substrate by laser or chemical process | Long service life; etch-and-fill color is less durable than the etch | Disconnects, combiner boxes, racking identification |
| Embossed or Stamped | Characters formed into the metal, readable when the surface is soiled or coated | Reads by touch and sight after coating loss | Disconnects, combiner boxes, racking identification |
| Digitally Printed Polyester or Vinyl | Ink applied to the surface of the material | Shortest of the four applications; vivid color | Indoor equipment, color-coded marking, shorter-cycle work |
Who We Supply To
- Solar installers and EPCs – We can assist with field-applied placards, disconnect and conduit marking, and rapid shutdown labeling produced to the label schedule in the approved plan set. Order the quantity the project uses, not a fixed kit size.
- PV equipment manufacturers – We can work with factory-applied nameplates for inverters, optimizers, combiners, and enclosures. Get serialized production runs with your logo and layout, made consistent batch after batch.
- Asset owners and O&M teams – Secure replacement identification for arrays whose original labels have faded, curled, or peeled and now have to be re-tagged before an inspection or a sale.
How to Order
Ordering starts with a conversation, not a part number:
- Describe the application – What the plate goes on, and whether it’s factory-applied or field-applied
- Describe the environment – Rooftop, ground mount, carport, coastal, desert, or inside a battery enclosure
- Send the artwork or label schedule – A plan set schedule, a drawing, or a sample of the plate being replaced
- Confirm quantity and marking – One prototype or a full production run, including serialization, barcodes, and logos
- Approve the proof – We proof layout, and, on serialized work, the number sequence, before production starts
Best yet, one Metal Marker Mfg. representative handles the project from that first call through delivery, so you never miss a beat.
Why Metal Marker Manufacturing
- In business since 1923
- ISO 9001:2015 certified quality management system, and an AS9100 compliant QMS
- Registered with the Directorate of Defense Trade Controls under ITAR
- Better Business Bureau accredited
- Products made in the USA, with raw materials kept in stock so production starts shortly after the order
- Able to supply any quantity, from a single prototype to a high-volume run
Frequently Asked Questions About Metal Asset Tags
What is the difference between a solar inverter nameplate and a solar panel ID label?
The inverter nameplate carries the ratings, listing marks, and warning text for the inverter, and it’s what an inspector reads at the enclosure. A solar panel ID label identifies the module, usually with its electrical characteristics, the standards it was tested to, and a serial number tied to a production batch.
How long will nameplates and labels last outdoors?
It depends on the process. Photo anodized aluminum is rated for 20 or more years outdoors, because the image sits beneath the anodic layer with no ink to wear off. Etched, embossed, and stamped metal hold their mark well past the point a printed label has failed. Surface-printed decals are the shortest lived and suit indoor equipment.
Can you produce serialized nameplates for a full production run?
Yes. Consecutive numbering can be produced through embossing, stamping, photo anodizing, and digital printing, with a barcode, QR code, or Data Matrix alongside the readable number. We proof the sequence before the run starts.
Is there a minimum order?
No. We produce anything from a single prototype plate to a high-volume run.
Which NEC edition applies to my project?
The jurisdiction sets that, and adopted editions vary from state to state. Confirm it with the authority having jurisdiction, then send us the label schedule from the approved plan set.
Request a Quote for Solar Inverter Nameplates
Send us the equipment, the environment, and the label schedule. We will recommend the material and marking process that will still be readable at the end of the system’s service life. Contact us for a free quote on solar inverter nameplates, solar panel ID labels, or PV equipment tags.
