Hi drake, I think you need to charge him so you can actually calculate/design the max H2 for any condition and size the vent system for that.
And lawyer = conduit Jay Peltz power. > On Oct 29, 2014, at 5:19 PM, Drake <[email protected]> > wrote: > > Hi Daniel, > > I typically vent them the way you do, which will allow any small amount of > hydrogen out. The customer is absolutely adamant about venting these to the > outside. I will cooperate so long as his method doesn't compromise the system > through cooling the batteries unnecessarily in the dead of winter. > > He is a lawyer and came to the conclusion of the need for venting to the > outside from reading the NEC which says that sealed batteries "require the > same amount of ventilation" as liquid lead acid batteries. The code also says > to vent appropriate to battery technology, so the code says two conflicting > things. On the other hand, it doesn't say that liquid electrolyte batteries > need to be vented to the outside. They will sure stink if you vent them to > the inside. > > Drake > > At 09:54 AM 10/29/2014, you wrote: >> I just re-read the original post Drake. These are AGM batteries. Do you have >> a "belt, suspenders,...then a rocket pack" type of client here? >> >> We typically vent our AGM boxes with small louver vents top and bottom to >> allow the batteries to ventilate for cooling purposes, not H2 concerns. >> >> With Regards, >> >> Daniel Young, >> NABCEP Certified PV Installation ProfessionalTM: Cert #031508-90 >> NABCEP Certified Solar Heating InstallerTM: Cert #SH031409-13 >> >> -----Original Message----- >> From: RE-wrenches [mailto:[email protected]] On >> Behalf Of Ray Walters >> Sent: Tuesday, October 28, 2014 11:12 PM >> To: RE-wrenches >> Subject: Re: [RE-wrenches] Passive Battery Venting >> >> That's why we usually have the batteries in a garage, basement, or out >> building that is not open to the living space. >> I've seen some cases of very well sealed and insulated enclosures allowing >> batteries to over heat, and also build up a lot of acid damaged connections. >> Boxes I've seen with more air space and less sealing don't get this build >> up, but you're correct: they do occasionally allow H2S into the surrounding >> area. >> >> R.Ray Walters >> CTO, Solarray, Inc >> Nabcep Certified PV Installer, >> Licensed Master Electrician >> Solar Design Engineer >> 303 505-8760 >> >> On 10/28/2014 8:10 PM, Jerry Shafer wrote: >> > >> > We do what we can to seal the enclosure so if or when a battery fails >> > and really gasses off the two vents on the same wall regardless of >> > wind direction will vent the gas. If it is not sealed then the gas can >> > travel through out the area this is not advised. >> > >> > >> >> _______________________________________________ >> 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 >> >> >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2012.0.2247 / Virus Database: 4031/7973 - Release Date: 10/29/14 >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2012.0.2247 / Virus Database: 4031/7973 - Release Date: 10/29/14 >> >> _______________________________________________ >> 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 > > _______________________________________________ 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
