[RE-wrenches] connector mismatch

[Brian Mehalic]

I don’t think “some white paper” is sufficient based on Code requirements, UL standards (6703), and verified field failures. Also see 2020 NEC® 690.33(C) - now requiring intermatability. 

Brian

> On Sep 4, 2019, at 2:06 PM, Jerry Shafer <jerrysgarage01 at gmail.com> wrote:
> 
> Wrenches
> Per some white papers connectors are interchangeable, this being said l have had arc issues as a result. FYI there are knock-offs out there to.
> Jerry
> 
>> On Wed, Sep 4, 2019, 1:42 PM Brian Mehalic <brian at solarenergy.org> wrote:
>> Are you saying each module has, for example, a positive factory H4 lead and a negative factory MC4 lead?
>> 
>> I definitely know of H4 problems, both mated with H4s and mismatched.  
>> 
>> Brian Mehalic 
>> NABCEP Certified Solar PV Installation Professional™ R031508-59
>> National Electrical Code® CMP-4 Member
>> (520) 204-6639
>> 
>> Solar Energy International
>> http://www.solarenergy.org
>> 
>> SEI Professional Services
>> http://www.seisolarpros.com
>> 
>> 
>> 
>>> On Wed, Sep 4, 2019 at 1:22 PM Kent Osterberg <kent at coveoregon.com> wrote:
>>> I've recently been looking for the cause of random power drop offs to 
>>> zero in an Enphase M215 system with LG260 PV module that was installed 
>>> in 2013. Just one inverter in a system of fourteen has been doing this. 
>>> Enphase suggested moving the inverter to a different PV module and sure 
>>> enough doing that proved the problem wasn't with the inverter.  
>>> Intermittent zero output was being caused by the PV module.  In making 
>>> the inverter/module change I found that all the LG 260 modules in this 
>>> system have one MC4 connector and one H4 connector. At present I'm 
>>> convinced the mismatched connector is the actual cause of the problem. 
>>> Anyone else ever notice find PV modules with mixed MC4 and H4 connectors?
>>> 
>>> Kent Osterberg
>>> Blue Mountain Solar
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