Yes, I would like more info too. I'm all about safety, but it needs to
be based on reality not theory. For instance, would string level shut
down have stopped the arcs you mentioned? Also, I second the
screening. Even if MLSD stops the fire, the rodents have still won the
day by taking out part of the array. How about an exemption from MLSD
for systems below a certain voltage, and having animal guard in place,
and those would still have string level shut down.
Ray Walters
Remote Solar
303 505-8760
On 1/29/21 3:58 PM, frenergy wrote:
Andrew,
If these are the only two examples of justification of
MLSD and not knowing the details of the examples you've cited, I
suggest there is a more effective, equal in labor to apply, less
expensive, durable solution. For the squirrel problem, an alternate
solution is one of the available edge of array screen products. Not
only does it stop the squirrels but it works for mice, leaves, pine
needles, etc.
Can you enlighten us about the cause of the resi fires
that were caused from the lack of MLSD's? Poor wire management? And
was the hole in the metal roof caused by the squirrel having lunch on
the wiring?
I feel it worth diving into this deeper for a variety of
reasons.
Bill
Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849
CA Lic 874049
www.frenergy.net
On 1/29/2021 11:56 AM, Solar Energy Solutions wrote:
Dear All,
I have been an outspoken critic of module level shutdown for all the
reasons folks do. However, I have come around. We have witnessed
too many systems where rooftop wiring has been chewed up by
critters... mostly squirrels. We have seen everything from
residential fires to holes in metal roofs caused by a DC arc. I
never thought I would see the day when I would not only be thinking
MLSD is a good idea but advocating for it.
Smiles,
**Andrew Koyaanisqatsi**
*President*
**Solar Energy Solutions, Inc.
/The BRIGHT CHOICE/
**
*Since 1987,**helping you and your Portland neighbors
move**towards an environmentally sustainable future.*
**503-238-4502
www.SolarEnergyOregon.com <http://www.solarenergyoregon.com/> **
On Friday, January 29, 2021, 11:25:28 AM PST,
s...@ecologicalsystems.biz <s...@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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