[RE-wrenches] TL inverter with long DC Feeder

[Michael Kelly]

Hi William,

I wanted to let you know that currently, there is no bypass terminal to allow for combining at the array in this series of inverters. We have gotten a lot of feedback from customers that this is a required feature. Working toward that, in the next few months, we will phase into production an update that will include a bypass, but the existing stock does not have the feature.

I wanted to let you know so you could plan appropriately.

Best,
Mike

Michael Kelly
[Solectria_Yaskawa_signature_logo]<http://www.solectria.com/>
HQ: 360 Merrimack Street, Bldg 9, Fl 2, Entrance I, Lawrence, MA 01843 USA
O: +1 978-683-9700 x167 | F: +1 978-683-9702
mike.kelly at solectria.com<mailto:mike.kelly at solectria.com> | www.solectria.com<http://www.solectria.com/>

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From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of William Miller
Sent: Monday, October 6, 2014 14:40
To: RE-wrenches
Subject: [RE-wrenches] TL inverter with long DC Feeder

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


[Gradient Cap_mini]
Lic 773985
millersolar.com<http://www.millersolar.com/>
805-438-5600

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