To all techies, what if a bleeder resister, similar to what is used on a
capacitor, was in parallel with the PV strings or array? That should pull down
any high voltage from a low illuminance light source.
Larry Crutcher
Starlight Solar Power Systems
On Mar 8, 2023, at 2:13 PM, Darryl Thayer
Hello the answer is yes. On a job several years ago to finish I worked
after dark. It was a full moon, and a street light was nearby I got bit
from a 500 Voc module string. I am sure I did not have 500 V but it only
takes 20 ma. To be deadly. I did not get my volt ohm meter out but I should
hav
Well, turns out there might actually be something to bright scene
lighting enabling some power
output during a fire at night.
Here is one paper from San Francisco.
http://ufsw.org/pdfs/photovoltaic_systems.pdf
However, firefighters have particular safeguards they should follow day
or night
I believe that kind of illumination could certainly put out some voltage
but wouldn't have much, if any, current or power behind it. But could
shock someone.
Any dangerous energy would have to come from a capacitor being charged
up that SHOULD be disconnected
through the rapid shutdown sys
They can generate enough illumination to have the module(s) reach ~ Voc.
On 3/8/2023 10:31 AM, Kristopher Schmid via RE-wrenches wrote:
Hi wrenches,
In speaking to local firefighters last year, I had a question that
stumped me. At night, will the light from the flames or the fire
fighters' f
kef>
From: RE-wrenches on behalf of
Kristopher Schmid via RE-wrenches
Sent: Wednesday, March 8, 2023 10:31:24 AM
To: RE-wrenches
Cc: Kristopher Schmid
Subject: [RE-wrenches] Fire fighters
Hi wrenches,
In speaking to local firefighters last year, I had a question that stumped me.
At night, wi
Hi wrenches,
In speaking to local firefighters last year, I had a question that stumped
me. At night, will the light from the flames or the fire fighters' flood
lights energize the array to a dangerous potential?
Any light you can shed (pun intended) would be most welcome.
Shine On!
Kris Schmi
02)-483-2564www.Foxfire-Energy.comNABCEP #092907-44
Original Message
Subject: Re: [RE-wrenches] Fire fighters safety class
From: Charles Picard <cpic...@solarcity.com>
Date: Wed, September 21, 2016 9:39 am
To: "d...@foxfire-energy.com" <d...@foxfire-energy.com>
of
reducing array voltage in a PV array in an emergency situation - using
equipment readily available. IMHO 20VDC is much preferable to
480VDC.
Thank You. db
Â
Dan Brown
Foxfire Energy Corp.
Renewable Energy Systems
(802)-483-2564
www.Foxfire-Energy.com
NABCEP #092907-44
---- Or
Hi charles, all.yes, foam is both not opaque enough and slides off.
Blue tarps / thin tarps are not eitheronly thick or canvas worksand
what if the wind blows it off during the response?
I recommend the irec / iaff Web class highly, it uses all the new UL data
and It covers nozzles pa
VDC
> is much preferable to 480VDC.
>
> Thank You. db
>
>
>
> Dan Brown
> Foxfire Energy Corp.
> Renewable Energy Systems
> (802)-483-2564
> www.Foxfire-Energy.com
> NABCEP #092907-44
>
>
> Original Message
> Subject: Re: [
Hi Dan,
I'll try to stop short of playing armchair firefighter here, and stick to what
legitimate data is available. I follow most of the prominent Firefighter trade
rags, and while there is some good technical content, there are also a fair
amount of opinion pieces.
The UL study linked earlie
b Dan BrownFoxfire Energy Corp.Renewable Energy Systems(802)-483-2564www.Foxfire-Energy.comNABCEP #092907-44
Original Message ----
Subject: Re: [RE-wrenches] Fire fighters safety class
From: Charles Picard <cpic...@solarcity.com>
Date: Tue, September 20, 2016 1:27 pm
To: "palumbo1...@g
Hi Dave,
These are some great questions you're asking, and you've prompted some
interesting responses. I've been partnered up with a career firefighter for the
past 2yrs teaching this subject, and have a few thoughts for you:
Review the NFPA's recommended best practices for interactions with PV
I suggest you review the testing UL did regarding firefighting and PV,
specifically their tests involving the use of foam, before jumping on that
bandwagon...
-Original Message-
From: "Dave Palumbo"
Sent: 9/20/2016 10:25
To: "'RE-wrenches'"
Subject: R
bject: Re: [RE-wrenches] Fire fighters safety class
Hey Dave, I'm a retired level 2 Fire Fighter and EMT. I've been invited to
address several EMS departments and State Electrical Classes about Solar / Off
Grid emergencies. All departments are required to re certify annually in
su
s going on.. More times than not, the home owner knows what's what.. Rule #1 in HAZMAT, 'If you see a truck driver running away from a crash.. keep up with them'.Hope this helps. dbDan BrownFoxfire Energy Corp.Renewable Energy Systems(802)-483-2564www.Foxfire-Energy.comNABCEP #092907-44
today, and they
probably already have some training in that regard.
Good luck!
Glenn Burt
-Original Message-
From: "Dave Palumbo"
Sent: 9/19/2016 22:13
To: "'RE-wrenches'"
Subject: Re: [RE-wrenches] Fire fighters safety class
Wrenches,
I will be pre
Wrenches,
I will be presenting a class on "Solar Home Fire Fighter Safety" to our
local volunteer fire department this coming weekend. I will tour them around
my off grid neighborhood so that we can review various PV, micro-hydro,
different inverters and battery systems, various back-up generat
t.
Taylorsville, CA 95983
530-284-7849/6544 fax
Solar powered since 1982
- Original Message -
From: "Dan Fink"
To: "RE-wrenches"
Sent: Tuesday, December 14, 2010 5:29 PM
Subject: Re: [RE-wrenches] Fire Fighters
Andrew;
I think that in the future, the solution to
Andrew;
I think that in the future, the solution to the dilemma of entire roof
aspects fully covered in PV vs. firefighter safety is going to be
module-level control. Some shade mitigation systems already have it,
including an "all stop" button at the system control center. I hope some
electr
s-boun...@lists.re-wrenches.org] On Behalf
Of Jesse Dahl
Sent: Tuesday, December 14, 2010 1:35 PM
To: RE-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] Fire Fighters
Hello,
I was reading about fire fighters and their interactions
with PV in the last issue of solar pro. Does anyone have
ex
t; [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf
> Of Jesse Dahl
> Sent: Tuesday, December 14, 2010 1:35 PM
> To: RE-wrenches@lists.re-wrenches.org
> Subject: [RE-wrenches] Fire Fighters
>
> Hello,
>
> I was reading about fire fighters and their interaction
o not ever belive anything, but seriously trust through
action.
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf
Of Jesse Dahl
Sent: Tuesday, December 14, 2010 1:35 PM
To: RE-wrenches@lists.re-wrenches.org
Subject: [R
Hello Jesse;
I wrote that article for Solar Pro.
The official "bottom line" curriculum for firefighters is available by
free download from CalFire here:
http://osfm.fire.ca.gov/training/photovoltaics.php
I do teach an IREC/ISPQ accredited class on the topic, to teach
professional PV installe
Hello,
I was reading about fire fighters and their interactions with PV in the last
issue of solar pro. Does anyone have experience with basic fire fighter PV
training? I would like to try it with my local departments.
Jesse
Sent from my iPad!!!
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