[RE-wrenches] TL inverter with long DC Feeder

[William Miller]

Friends:

If only an SMA would work here. But DC volts too low. We are using Solectria PVI5200TLS. 

We do not use PV wire. We transition to THWN-2 in conduit immediately. 

William

Miller Solar

> On Oct 6, 2014, at 8:30 PM, Chris Mason <cometenergysystems at gmail.com> wrote:
> 
> I presumed SMA TL series. 
> 
>> On Mon, Oct 6, 2014 at 10:02 PM, Jerry Shafer <jerrysgarage01 at gmail.com> wrote:
>> As i read the thread you say TL which TL SMA, AE ect. They have defferent dc input designs
>> 
>>> On Oct 6, 2014 12:21 PM, "jay peltz" <jay at asis.com> wrote:
>>> I do believe the outback and midnite combiners have a lock hole to prevent exactly your concern.
>>> unauthorized access.
>>> 
>>> jay
>>> 
>>> peltz power
>>>> On Oct 6, 2014, at 11:40 AM, William Miller wrote:
>>>> 
>>>> Wrenches:
>>>>  
>>>> We are getting up to speed on using transformer-less inverters.  I have advocated long for the additional safety offered by these inverters but I am realizing the trade-offs with the new technology:  The implementation gets more complicated with the requirement for PV wire, OCPD and disconnecting means for plus and minus and plus providing  Arc Flash rated equipment.
>>>>  
>>>> I am currently designing a system that will locate the PV about 400 feet from the residence.  The system will utilize 2 Solectria 5200 watt inverters at the residence.  I would like to provide disconnecting means for the 4 strings at the array, in case of any needed service or excavating.  Preferably I’d like the disconnecting means to be deployable by a lay person (i.e. the gardener).
>>>>  
>>>> Finding an 8 pole, arc flash, 600 VDC rated disconnect is not easy.  I could install an Outback 8 circuit combiner with 8 touch-safe fuse holders.  The new combiners have had dead-fronts for a while now.  The gardener needs only to have a Philips screw driver to open this cover.  Any better ideas out there?
>>>>  
>>>> Thanks,
>>>>  
>>>> William
>>>>  
>>>>  
>>>> <image002.jpg>
>>>> Lic 773985
>>>> millersolar.com
>>>> 805-438-5600
>>>>  
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> 
> 
> -- 
> Chris Mason
> NABCEP Certified Solar PV Installer™
> Solar Design Engineer
> Generac Generators Industrial technician
> 
> www.cometsolar.com
> 264.235.5670
> 869.662.5670
> Skype: netconcepts
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