[RE-wrenches] Rapid Shutdown for Ground Mounted Multimode (Battery) Inverters

[Dave Angelini Offgrid Solar]

Hi Chris,

A few times and my back-up with a schneider system is their rapid
shutdown. In the end the inspector comes around and realizes there is
little gain for an offgrid ground mounted array for fireman. You do have to
educate them and if they are insistent on being a bonehead, install the RS
for the inspection and then use the box for the next one or sell it.

 After almost 30 years offgrid the last thing I want is something that can
fault out the solar or worse when I am away. Networks can be the enemy at
times. Less is more offgrid in my opinion.


Dave Angelini Offgrid Solar
"we go where powerlines don't"
http://members.sti.net/offgridsolar/
e-mail offgridsolar at sti.net
text 209 813 0060

On Thu, 13 Feb 2020 13:07:53 -0500, Christopher Warfel
<cwarfel at entech-engineering.com> wrote:
> I got involved in a long discussion on Rapid Shutdown compliance for 
> battery multimode, grid interconnect inverters that have a ground 
> mounted array.  At one point, ground mounted array was not supposed to 
> be subject to Rapid Shutdown unless there were dc conductors on the 
> building.  NEC 2017 seems to say it is if conductors are 3' in or on 
> buildings.  The intent of Rapid Shutdown was supposed to protect fire 
> fighters from exposure to high dc voltage when the array was on a roof. 
> Every code cycle it morphs into something a little different.  Has 
> anyone had to confront this situation, and was this type of project 
> subject to Rapid Shutdown?  Thanks in advance for any clarity on this.  
> Chris
> 
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