[RE-wrenches] Flammable Vapor Ignition Resistant

[Sue Stankevitz]

They may be looking for the Class 1 Div 2 rating with means that it has been designed to safely operate in environments where flammable vapors or gases exist and have the potential to rise to ignitable concentrations. Midnite had to get a charge controller certified to that standard several years ago.

Sue Stankevitz
MidNite Solar, Inc.<https://www.midnitesolar.com/index.php>
(360) 403-7207 (XT122)
[cid:image001.gif at 01DC2220.238F1630]

From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf Of Jay via RE-wrenches
Sent: Tuesday, September 9, 2025 6:27 PM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Cc: Jay <jay.peltz at gmail.com>
Subject: Re: [RE-wrenches] Flammable Vapor Ignition Resistant

What would be the rating for that?

Is it a NEMA or?

Jay


On Sep 9, 2025, at 3:08 PM, Glenn via RE-wrenches <re-wrenches at lists.re-wrenches.org<mailto:re-wrenches at lists.re-wrenches.org>> wrote:

Unfortunately  codes and standards are constantly changing and inspectors are trying to catchup and interpret them as quickly as possible to ensure compliance for safety sake.
Erring on the side of safety is their job until educated otherwise

-Glenn

On Sep 9, 2025 17:00, Jason Szumlanski via RE-wrenches <re-wrenches at lists.re-wrenches.org<mailto:re-wrenches at lists.re-wrenches.org>> wrote:

That's a first for me. The Enphase battery is sealed, but I don't know if that qualifies as sealed against vapor.

I'd reach out to Enphase to get some guidance on that. It's always something with these AHJs.

Jason Szumlanski
Principal Solar Designer | Florida Solar Design Group
NABCEP Certified Solar Professional (PVIP)
Florida State Certified Solar Contractor CVC56956
Florida Certified Electrical Contractor EC13013208


On Tue, Sep 9, 2025 at 4:13 PM Zeke Yewdall via RE-wrenches <re-wrenches at lists.re-wrenches.org<mailto:re-wrenches at lists.re-wrenches.org>> wrote:
My interpretation of this is that he wants to make sure that the battery cannot ignite a flammable vapor cloud from gasoline being spilled in the garage.  If he's saying that no electrical equipment that might create a spark (such as with a relay or switch or circuit breaker) can be below 18", that may be the case.   I might be completely off base here, but I don't think it has anything to do with it being a battery really, but just a piece of electrical equipment that might have relays or sparking things inside?  Maybe?  In which case... does the 5p have any relays or contactors, or is it's BMS all solid state?  And second question would be can you document that.

Zeke

---------------------------------
Seeking your suggestions and direction. My AHJ - after acknowledging that the Enphase 5p battery has a floor mount option - now insists that it must be 18-inches above the garage floor unless I can produce something that says it is "Flammable Vapor Ignition Resistant."

We all know there is no open flame from an ESS and I know the 9540A depicts a battery at 6-inches.

Anybody run into this and have suggestions on what I might show back to the AHJ?

Howard "Scot" Arey
Owner, Solar CenTex
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