Hello Wrenches... Since Ken brought it up....
Inverters are the most common of the ignition sources, with loose connections being a close second... Inside each inverter/charger is a transfer relay, this relay when it transfers to or from grid will spark. This sparking action can cause Hydrogen gas to ignite. If there is over 1% by volume of hydrogen gas in the room, cubby or where ever this is installed the relay arching can cause the hydrogen to ignite. This will flame out, much like lighting gunpowder, or gasoline fumes. The flame will follow the hydrogen back to the source (The battery) and once it gets inside the battery it will find compression, as the hydrogen ignites inside the battery that compression can/will cause the battery top to blow off... Here are some examples of what it looks like when you have a hydrogen Ignition... https://drive.google.com/drive/folders/17H274ArR99FejHqCurn_9-hgJDSegPOv?usp=sharing . The number one way to prevent this is to put enough air flow thru the room to remove the hydrogen gas before it can ignite. Also Hydrogen gas is very corrosive... I still don't know why people install inverter/charge controller right above battery banks, I've seen charge controllers installed right above the battery bank that any non-conformal coated connection was corroded due to hydrogen gasses. I've found that it's always best to enclose any battery bank in some box and at the highest point in the box put in a fan to remove the hydrogen from the box when the battery voltage gets above 2.25vpc/13.4v/26.8v/54v. This is a pretty good article on calculating gassing from a battery bank. http://giantbatteryco.com/GLOSSARY/Calculate.Industrial.Battery.Hydrogen.Gas.Emission.html <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> Steve Higgins ⋅ Technical Services Manager t +1.902.597.4020 m +1.206.790.5840 f +1.902.597.8447 e [email protected] <http://www.facebook.com/RollsBattery> <http://www.facebook.com/RollsBattery> <http://www.twitter.com/RollsBattery> <https://www.youtube.com/user/RollsBattery> <https://www.linkedin.com/company/rolls-battery-engineering> <http://www.instagram.com/RollsBattery> <http://www.instagram.com/RollsBattery> <http://www.instagram.com/RollsBattery> ------------------------------ CONFIDENTIALITY: The information transmitted herein is intended only for the addressee and may contain confidential, proprietary and/or privileged material. Any unauthorized review, distribution or other use of or the taking of any action in reliance upon this information is prohibited. If you receive this email in error, please contact the sender and delete or destroy this message and all copies. ------------------------------ On Tue, Jul 31, 2018 at 9:18 AM Ken Schaal <[email protected]> wrote: > I have a set of AGM's installed near the inverter, on a roll out dolly, > under the landing, up 5 steps from the garage to the 1st fl.. > Another set of AGM's in a 4-5' crawl space. Was a bit of a tussle last > year to replace those four, but then I was 72 with achy knees. 8 ' from > access door to batteries. White, reinforced vapor barrier closed crawl > space. No ignition source like water heater. > > Inverter mounted high on wall adjoining batteries. > SCP in kitchen for info. > Ken Schaal > Commonwealthsolar.com > > > On Tue, Jul 31, 2018, 10:21 AM Chris Schaefer <[email protected]> > wrote: > >> Jerry, >> >> Attached is a picture of a battery box made out of red oak that houses a >> set of twelve Surrette Rolls 4ks25 underneath the clients stair landing. >> The inverter system is just off to the left and is in the "game" room. Thus >> the client wanted the battery box to resemble a piece of fine furniture. >> Well we accomplished that but the client is over 6 foot and we both >> always grumble when having to service these. While code is critical just >> imagine when you're in your 50's and 60's and still having to service >> these. Never again, LOL! >> >> Christopher Schaefer >> >> Chris Schaefer’s >> <http://www.solarandwindfx.com/> >> >> *Tel/Fax 585-229-2083 or Cell 585-748-1870 * >> *5115 South Hill Road ~ Canandaigua New York 14424**www.solarandwindfx.com >> <http://www.solarandwindfx.com/> ~ E-mail: [email protected] >> <[email protected]>* >> >> >> Thomas Jefferson, the author of our great Constitution, once said, >> "democracy" will cease to exist when you take away from those who are >> willing to work and give to those who would not." >> >> >> On Mon, Jul 30, 2018 at 12:19 AM, frenergy <[email protected]> wrote: >> >>> Jerry, >>> >>> I serviced a system that (who became my) customer installed >>> just like that. To me, it doesn't really matter what the NEC thinks about >>> it. It was great because it showed me what I would *never* duplicate in >>> my repertoire of installs. >>> >>> Bill >>> >>> On 7/28/2018 5:10 PM, Jerry Caldwell wrote: >>> >>> Wrenches, >>> >>> I have a customer who wants to have batteries installed in a 4' tall >>> crawl space / short basement. Are there any accessibility code issues with >>> installing batteries in a crawl space? Does the NEC address this? >>> >>> Thanks, >>> Jerry Caldwell >>> >>> >>> _______________________________________________ >>> List sponsored by Redwood Alliance >>> >>> List Address: [email protected] >>> >>> Change listserver email address & >>> settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> List-Archive: >>> http://www.mail-archive.com/[email protected]/maillist.html >>> >>> List rules & etiquette:www.re-wrenches.org/etiquette.htm >>> >>> Check out or update participant bios:www.members.re-wrenches.org >>> >>> >>> -- >>> Feather River Solar Electric >>> Bill Battagin, Owner >>> 4291 Nelson St. >>> Taylorsville, CA 95983 >>> 530.284.7849 >>> CA Lic 874049www.frenergy.net >>> >>> >>> >>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon> >>> Virus-free. >>> www.avast.com >>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link> >>> <#m_1083934589469718641_m_6716287820509096766_m_4175795908426477908_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >>> >>> _______________________________________________ >>> List sponsored by Redwood Alliance >>> >>> List Address: [email protected] >>> >>> Change listserver email address & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> List-Archive: >>> http://www.mail-archive.com/[email protected]/maillist.html >>> >>> List rules & etiquette: >>> www.re-wrenches.org/etiquette.htm >>> >>> Check out or update participant bios: >>> www.members.re-wrenches.org >>> >>> >>> >> >> >> -- >> >> Chris Schaefer’s >> <http:www.solarandwindfx.com> >> >> *Tel/Fax 585-229-2083 or Cell 585-748-1870 * >> *5115 South Hill Road ~ Canandaigua New York 14424**www.solarandwindfx.com >> <http://www.solarandwindfx.com> ~ E-mail: [email protected] >> <[email protected]>* >> >> >> Thomas Jefferson, the author of our great Constitution, once said, >> "democracy" will cease to exist when you take away from those who are >> willing to work and give to those who would not." >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/[email protected]/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > >
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