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Which plug-in solar kits are UL 3700 certified? What the lab records show

By · Checked

Short answer

We found no complete plug-in solar kit with a UL 3700 listing in the public directories we searched (CSA Group, Intertek and UL Solutions). One microinverter is listed there as a part of a plug-in system, not as a whole kit. One more maker says a lab has certified its inverter, but the record isn't public yet.

As of Oct 5, 2026. This changes quickly; we recheck and date every entry.

The evidence, product by product

Three levels, strongest first: a record we found in a testing lab's own public directory; a maker that names the lab, with no public record yet; and a maker's claim with no lab named. Quotes are word for word from the linked source.

  • APsystems EZ1-LV microinverter

    Microinverter only, not a whole kit

    In a lab's public directory
    Lab record
    CSA file 259077, class 5311-80 (CSA Group), held by Altenergy Power System Inc. PIPV grid interactive inverter model: EZ1-LV, interconnected with other subassembly plug-in equipment to form a PIPV System
    Maker says
    CSA Certified to UL3700 standards usa.apsystems.com, Jul 15, 2026
    Limits
    • future evaluation should be considered when forming a complete PIPV system with other subassembly parts (CSA record)
    • The models listed only intended for use on dedicated Circuits (Branch circuit breaker 10A). (CSA record)

  • Mango Power S Pro microinverters

    Microinverter only, not a whole kit

    Maker names a lab; no public record yet
    Maker says
    Intertek issued the Authorization to Mark on September 7, 2026. mangopower.com, Sep 17, 2026
    Limits
    • S Pro's new component recognition does not certify every complete kit or accessory combination. (Mango Power)
    What we found
    • Not in Intertek's public directory when we checked. Mango Power's post says directory updates may follow.

  • Hoymiles HiFlow Pro microinverter

    Microinverter only, not a whole kit

    Maker's claim; no lab named
    Maker says
    the first UL 3700-compliant plug-in solar microinverter hoymiles.com, Jul 15, 2026
    What we found
    • The announcement names no testing lab or certificate number.
    • Bright Saver, which sells kits with this inverter, says it earned "a UL 3700 subassembly certification" in July 2026; it names no lab either.
    Press
    It is not certified by UL Solutions, but designed to meet the UL 3700 standard. InsideEVs (correction, via Yahoo Tech), Jul 21, 2026

  • Bright Saver balcony solar kits (180 W and 360 W)

    Whole kit

    Maker says the kit lacks it
    Maker says
    The Hoymiles inverter in our kits is UL 1741 certified. brightsaver.org
    Maker also says
    whole-system certification such as UL 3700, which this kit does not currently have

A maker missing from this list hasn't been checked yet; it doesn't mean anything about its products. Know of a lab record we missed? Tell us, with the lab and file number.

Why an inverter record isn't a kit record

UL 3700 covers plug-in photovoltaic equipment and systems. A lab can certify one part, such as the microinverter, for use in a system that is evaluated later as a whole. The one public record we found says so itself: future evaluation should be considered when forming a complete PIPV system with other subassembly parts.

What that means for you depends on your state's wording. Of the 10 state laws in force or signed, 3 name UL 3700, the new plug-in-specific standard; 1 names UL 1741, an inverter standard; and 6 ask for a listing by an independent testing lab without naming either. What each state's law asks for.

  • There isn't yet a product that can meet the letter of the law. Nadav Enbar, Electric Power Research Institute, in Stateline, Sep 30, 2026.
  • no product has yet earned certification Canary Media, Aug 26, 2026.

Where we looked

  • CSA Product Listing Searched Class 5311-80, "Interactive Plug-In PV Equipment and Systems (PIPV) - Certified to US Standards" (requirement: UL Subject 3700), holds one certification record: file 259077.
  • Intertek ETL Listed Mark directory Searched No record lists UL 3700 or plug-in photovoltaic equipment. Mango Power Tech Inc. has records for UL 1741 and IEEE 1547, none for UL 3700.
  • UL Product iQ Searched Searched the abridged site (no account). "PIPV" and "Interactive Plug-in Photovoltaic" return no records, and "UL 3700" returns only unrelated products. The full database needs an account, which we haven't used.
  • TÜV certificate databases Not searched Not searched yet.

How to check a claim yourself

  1. Ask which lab, which standard, and the file number. A real certification has all three.
  2. Look the number up in the lab's own directory. The links above go to each lab's search page.
  3. Check what the record covers. The inverter alone, or the panels, cables, plug and mounting too?
  4. Read "compliant" and "designed to meet" as the maker's words. They aren't a lab's listing.

Is a kit worth it where you live?

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Certified kits: questions

Is any plug-in solar kit UL 3700 certified?

We found no complete plug-in solar kit with a UL 3700 listing in the public directories we searched (CSA Group, Intertek and UL Solutions). One microinverter is listed there as a part of a plug-in system, not as a whole kit. One more maker says a lab has certified its inverter, but the record isn't public yet. We checked on Oct 5, 2026. We haven't searched TÜV certificate databases, so a listing could exist there.

Which plug-in solar products have a UL 3700 record?

The APsystems EZ1-LV microinverter (CSA file 259077, class 5311-80, CSA Group). It is listed as a part of a plug-in system, and the record says a complete system needs further evaluation.

Is UL 1741 enough for my state?

It depends on the wording of your state's law. Of the 10 state laws in force or signed, 3 name UL 3700, the new plug-in-specific standard; 1 names UL 1741, an inverter standard; and 6 ask for a listing by an independent testing lab without naming either. What each state asks for

How do I check a certification claim myself?

Ask the seller which lab certified the product, to which standard, and for the file or certificate number. Then look that number up in the lab's own public directory. "Compliant with" or "designed to meet" a standard is the maker's statement, not a lab's.

How this page is kept

Every entry has a source we opened ourselves on Oct 5, 2026 and a quote copied from it. We don't describe a product as uncertified unless its maker says so. We don't take payment for listings, and there are no paid links on this page.

General information, not legal or electrical advice. A certification record doesn't by itself mean a product meets your state's law.