[RE-wrenches] AC Coupled Enphase

[Drake]

Hi Nick,

That is very good news. I just hit the wall trying to find 2 pole 
solid state N/C relays.  I was trying to decide whether to go back to 
mechanical or buy double the amount of single pole relays.

Thanks,

Drake

At 11:20 AM 8/28/2017, you wrote:
>Content-Language: en-US
>Content-Type: multipart/alternative;
>         boundary="_000_56449940CA694DDAABB811FCC45A2070enphaseenergycom_"
>
>You can use a one-pole relay.  We show one-pole switching in our 
>zero-export, self-consumption doc for PEL applications.
>
>Nick Soleil
>Field Application Engineer
>Enphase Energy
>Cell: 707-321-2937
>
>On Aug 28, 2017, at 6:44 AM, Drake 
><<mailto:drake.chamberlin at redwoodalliance.org>drake.chamberlin at redwoodalliance.org> 
>wrote:
>
>>Hello Wrenches,
>>
>>I am going to AC couple some Enphase inverters and found some 
>>really nice solid state, single pole relays to control them with. 
>>Enphase says I must use 2 pole relays for the control current even 
>>though the disconnects will turn off all power for maintenance.
>>
>>Enphase claims that the inverters will not shut down reliably with 
>>only one line opened. This does not make sense to me in view of UL 
>>1741. Is Enphase correct in their claim, or are there other reasons 
>>that both poles need to be opened
>>
>>I want to use the solid state relays because the coil voltage is 
>>between 3 and 32 volts. This would avoid the need to add voltage 
>>dropping series resistors to protect the coil for higher battery voltages.
>>
>>Alternatively, does anyone know of reasonably priced, 2 pole solid 
>>state relays?
>>
>>Thanks,
>>
>>Drake
>>
>>
>>Drake Chamberlin
>>Athens Electric LLC
>>OH License 44810
>>CO License 3773
>>NABCEP Certified Solar PV
>>740-448-7328
>>
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