[RE-wrenches] MLSD module level shutdown

[Dave Angelini Offgrid Solar]

Hi Sly,

 The small part of the industry ( Offgrid ) mostly uses ground mounting
and is not using MLSD. On some new offgrid homes I use rapid shutdown at
MPPT level to get the permit if the AHJ can't be reasoned with. The
Schneider rapid shutdown has a nice 600 vdc disconnect in it,  that is
useful later if the homeowner decides to abandon the extra electronics that
can affect reliability.

We also protect the area under and near the modules to guard against a 
rare defect from causing a wildfire.

I would like to hear what Outback is doing for this also from you guys
please?  FRIDAY !!!


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 Fri, 29 Jan 2021 14:09:48 -0500, sky at ecologicalsystems.biz wrote:
> So far the module level shutdown requirements have been a real blow to
our
> industry. The reliability and cost from a maintenance and installation
> standpoint has been very hit or miss so far. It feels like this
requirement
> was rolled out far too quickly without enough forethought to its impact
on
> the industry. We are constantly going out and fixing problems with mlsd
> installed by other contractors. Thankfully the problems have nothing to
do
> with the quality of the installations. The problems are almost all due
to
> premature failure of the products or some inherent defect in them. This
is
> a serious issue costing the industry time and resources and making our
> installers less safe. It just doesn’t really accomplish the intended
goal
> of the requirement. 
> I’m curious how other wrenches are dealing with this issue. I recently
> became aware of fixMLSD.com which appears to be focused on bringing a
more
> sensible approach to this requirement. 
> 
> Your thoughts are appreciated,
> Sky Sims
> Https://EcologicalSystems.biz
> “Just An Old Wrench”
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