[RE-wrenches] 1000V System Wiring Details

[August Goers]

HI Chris,



According to the spec sheet, the Sunny Tripower is rated MPPT from 300 V to
800 V with a min MPPT tracking capability down to 150 V. It seems like
going below 600 V would work fine witch that particular inverter. I haven't
checked the specs on all the others.



Best, August



*From:* re-wrenches-bounces at lists.re-wrenches.org [mailto:
re-wrenches-bounces at lists.re-wrenches.org] *On Behalf Of *Chris Mason
*Sent:* Wednesday, March 26, 2014 7:49 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] 1000V System Wiring Details



All the European spec inverters I have used would shut down at 600V so
that's not a great idea.

On systems with long runs, we use a fused switched combiner and run 1KV #6
for the home runs. But that's for very long runs. You can put a lot of
power over a #10 PV Wire at 800V working voltage.



On Wed, Mar 26, 2014 at 10:31 PM, August Goers <august at luminalt.com> wrote:

Hi Dave,



We've run all the way home with 1000 V PV wire and only made splices with
Amphenol MC4-type 1000 V connectors. Going forward, we are going to strive
to put inverters on the roof to minimize the expense of dealing with the
1000 V runs. Another interesting idea is to use the 1000 V inverters but
just run them below 600 V and use standard 600 V wiring products. On a
separate note, we have a lot of 208 VAC applications in the Bay Area and
all these new neat TL inverters only run at 480 V. Someone from SMA
recently pointed out that we can source 480 to 208 V transformers for a
reasonable cost - we might look into that as well.



Best,



August






*August Goers*

Principal

Luminalt Energy Corporation

o: 415.641.4000

m: 415.559.1525

www.luminalt.com





On Wed, Mar 26, 2014 at 3:01 PM, Dave Click <daveclick at fsec.ucf.edu> wrote:

Hi Wrenches-

If you're installing 1000V systems, are you running continuous PV WIRE all
the way to your inverters? If not-- what splices have you found (aside from
MC4s and similar) that are listed for 1000V? And when transitioning from PV
WIRE to a cheaper conductor, what 1000V options exist beyond USE-2?

Thanks!
Dave
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-- 
Chris Mason

President, Comet Systems Ltd

www.cometenergysystems.com

Cell: 264.235.5670

Skype: netconcepts
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