re-wrenches-requ...@lists.re-wrenches.org wrote:
>Send RE-wrenches mailing list submissions to > re-wrenches@lists.re-wrenches.org > >To subscribe or unsubscribe via the World Wide Web, visit > http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org >or, via email, send a message with subject or body 'help' to > re-wrenches-requ...@lists.re-wrenches.org > >You can reach the person managing the list at > re-wrenches-ow...@lists.re-wrenches.org > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of RE-wrenches digest..." > > >When responding to posts within the Digest, be sure to restore the Subject: >line to the original, and please edit out any extraneous lines from the quoted >message. > > >Today's Topics: > > 1. Re: Ballasted Roof Racking Recommendations? (Dana Brandt) > 2. Re: Power line communications interference (Dana Brandt) > 3. Re: Ballasted Roof Racking Recommendations? (Bill Hoffer) > 4. Re: Trojan L-16 SG Readings- Did Something Change? (John DeBoever) > 5. Battery Specialist (d...@foxfire-energy.com) > 6. Re: Battery Specialist (bob ellison) > 7. Re: Ballasted Roof Racking Recommendations? (R Ray Walters) > 8. Re: Ballasted Roof Racking Recommendations? (benn kilburn) > 9. Re: Ballasted Roof Racking Recommendations? (David Brearley) > 10. Grid tie with BB (Rich Nicol) > 11. Re: Grid tie with BB > (Larry Crutcher, Starlight Solar Power Systems) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Fri, 31 Aug 2012 12:17:21 -0700 >From: Dana Brandt <d...@ecotechenergy.com> >To: RE-wrenches <re-wrenches@lists.re-wrenches.org> >Subject: Re: [RE-wrenches] Ballasted Roof Racking Recommendations? >Message-ID: > <caeo4mb0byk3gmjpdykxvgxlwgg1xqu2paqfaksv01h-jnre...@mail.gmail.com> >Content-Type: text/plain; charset="iso-8859-1" > >We just did a system on 10 degree AET and liked it. I think they have a 30 >degree option. I'd be worried about inter-row shading, though. > >The DPW POWER-FAB BRM has more flexibility with row spacing, but I found it >to be pretty expensive. > >Dana > >Dana Brandt >Ecotech Energy Systems, LLC >www.ecotechenergy.com >d...@ecotechenergy.com >360.318.7646 > > >On Tue, Aug 28, 2012 at 1:56 PM, Glenn Burt <glenn.b...@glbcc.com> wrote: > >> Hi Ryan,**** >> >> ** ** >> >> We have used the AET Rayport stainless steel ballasted racking system on >> dozens of installations and have been quite satisfied with the light >> ballast required (all open racking), integral module grounding, lightweight >> of materials (pressed stainless steel) and quickness of assembly.**** >> >> ** ** >> >> http://aetenergy.com/products/RAYPORT-B-solar-mount-solution**** >> >> ** ** >> >> Glenn Burt**** >> >> glb, Consulting Company**** >> >> ** ** >> >> *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto: >> re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Ryan Harkins >> *Sent:* Tuesday, August 28, 2012 2:32 PM >> *To:* RE-wrenches >> *Subject:* [RE-wrenches] Ballasted Roof Racking Recommendations?**** >> >> ** ** >> >> Anyone have recommendations for a ballasted roof racking manufacturer? >> Tilts of 30-degrees or more would be best. **** >> >> ** ** >> >> *Ryan Harkins** >> NABCEP Certified Solar PV Installer / >> Project Manager* >> >> >> >> **** >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> >> >> >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120831/3fd373ee/attachment.html> > >------------------------------ > >Message: 2 >Date: Fri, 31 Aug 2012 12:26:59 -0700 >From: Dana Brandt <d...@ecotechenergy.com> >To: RE-wrenches <re-wrenches@lists.re-wrenches.org> >Subject: Re: [RE-wrenches] Power line communications interference >Message-ID: > <CAEo4MB2=jax34qe8qcn5wzzzg4w6k1hwumagut_jihtrr2z...@mail.gmail.com> >Content-Type: text/plain; charset="iso-8859-1" > >Enphase recommends this ferrite toroid you can put on the lines to the pump >to filter out the noise: > >http://www.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=Epcos%20B64290L0082X087&cur=USD > >Dana > >Dana Brandt >Ecotech Energy Systems, LLC >www.ecotechenergy.com >d...@ecotechenergy.com >360.318.7646 > > >On Thu, Aug 23, 2012 at 2:51 PM, August Goers <aug...@luminalt.com> wrote: > >> William, >> >> You might try calling Enphase again. I was discussing a similar issue with >> them recently and they said that they have a noise filter option for >> handling noisy lines. As with all tech support, some representatives are >> better than others. >> >> -August >> >> >> August Goers >> >> Luminalt Energy Corporation >> m: 415.559.1525 >> o: 415.641.4000 >> aug...@luminalt.com >> >> >> -----Original Message----- >> From: re-wrenches-boun...@lists.re-wrenches.org >> [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William >> Miller >> Sent: Thursday, August 23, 2012 10:32 AM >> To: RE-wrenches >> Subject: [RE-wrenches] Power line communications interference >> >> Friends: >> >> In the old days of the Sunny Boy Control Light we battled problems with >> power line communications due to interference from external sources. I am >> now troubleshooting a problem with and Enphase Envoy. I have spoken to >> Tech Support several ties about this. I was told I need to move the Envoy >> out to the array, not an elegant solution. >> >> Never once was it suggested that interference could be the problem but it >> turns out when we turn off a pond pump the system communicates flawlessly. >> Have any of you dealt with this? If so, what have you done to remedy the >> problem? >> >> William >> >> Miller Solar >> Voice :805-438-5600 >> email: will...@millersolar.com >> http://millersolar.com >> License No. C-10-773985 >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> >> >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120831/82d6dce5/attachment-0001.htm> > >------------------------------ > >Message: 3 >Date: Fri, 31 Aug 2012 12:36:53 -0700 >From: Bill Hoffer <suneng...@gmail.com> >To: RE-wrenches <re-wrenches@lists.re-wrenches.org> >Subject: Re: [RE-wrenches] Ballasted Roof Racking Recommendations? >Message-ID: > <CAL4Seawz7KOhf1a1gLe=g7LQRs3Dm=cpvajqunjy95bkjwx...@mail.gmail.com> >Content-Type: text/plain; charset="windows-1252" > >Ryan > >I do not think that they have a 30 degree option, but I have been pretty >impressed with Dynoraxx <http://dynoraxx.com/>tool-less approach and using >fiberglass non-conductive material ( read no grounding of racking). Now >all we need is a fiberglass non-conducting module frame! > >Bill Hoffer > >On Fri, Aug 31, 2012 at 12:17 PM, Dana Brandt <d...@ecotechenergy.com>wrote: > >> We just did a system on 10 degree AET and liked it. I think they have a 30 >> degree option. I'd be worried about inter-row shading, though. >> >> The DPW POWER-FAB BRM has more flexibility with row spacing, but I found >> it to be pretty expensive. >> >> Dana >> >> Dana Brandt >> Ecotech Energy Systems, LLC >> www.ecotechenergy.com >> d...@ecotechenergy.com >> 360.318.7646 >> >> >> On Tue, Aug 28, 2012 at 1:56 PM, Glenn Burt <glenn.b...@glbcc.com> wrote: >> >>> Hi Ryan,**** >>> >>> ** ** >>> >>> We have used the AET Rayport stainless steel ballasted racking system on >>> dozens of installations and have been quite satisfied with the light >>> ballast required (all open racking), integral module grounding, lightweight >>> of materials (pressed stainless steel) and quickness of assembly.**** >>> >>> ** ** >>> >>> http://aetenergy.com/products/RAYPORT-B-solar-mount-solution**** >>> >>> ** ** >>> >>> Glenn Burt**** >>> >>> glb, Consulting Company**** >>> >>> ** ** >>> >>> *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto: >>> re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Ryan Harkins >>> *Sent:* Tuesday, August 28, 2012 2:32 PM >>> *To:* RE-wrenches >>> *Subject:* [RE-wrenches] Ballasted Roof Racking Recommendations?**** >>> >>> ** ** >>> >>> Anyone have recommendations for a ballasted roof racking manufacturer? >>> Tilts of 30-degrees or more would be best. **** >>> >>> ** ** >>> >>> *Ryan Harkins** >>> NABCEP Certified Solar PV Installer / >>> Project Manager* >>> >>> >>> >>> **** >>> >>> _______________________________________________ >>> List sponsored by Home Power magazine >>> >>> List Address: RE-wrenches@lists.re-wrenches.org >>> >>> Options & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> List-Archive: >>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>> >>> List rules & etiquette: >>> www.re-wrenches.org/etiquette.htm >>> >>> Check out participant bios: >>> www.members.re-wrenches.org >>> >>> >>> >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> >> >> > > >-- >Bill Hoffer PE >NABCEP Certified Solar PV Installer? >Sunergy Engineering Services PLLC >2504 Columbia Ave NW >East Wenatchee WA 98802-3941 >suneng...@gmail.com Cell:(509)679-6165 >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120831/69381a0a/attachment-0001.htm> > >------------------------------ > >Message: 4 >Date: Fri, 31 Aug 2012 20:05:22 +0000 >From: John DeBoever <jdeboe...@trojanbattery.com> >To: RE-wrenches <re-wrenches@lists.re-wrenches.org> >Subject: Re: [RE-wrenches] Trojan L-16 SG Readings- Did Something > Change? >Message-ID: > <cc4e5d1c542d8c4c9cbee800875f05357f8d2...@trojmail1.trojanbattery.com> >Content-Type: text/plain; charset="iso-8859-1" > >Sequoya, Wrenches, > >Thank you for your patience on this, as I had no easy Internet connection. >Below are the clarifications requested. > > > > >? Trojan Premium L16RE-B datasheet can be found here: >http://www.trojanbatteryre.com/PDF/datasheets/L16REB_TrojanRE_Data_Sheets.pdf > > > >? Trojan Premium line ( >http://www.trojanbatteryre.com/PDF/Premium_Trojan_ProductLineSheet.pdf ) has >indeed changed its specific gravity from nominal 1.260+-0.007 to nominal >1,280+-0.007 since March 2012 production. This change was motivated to reduce >the confusion in the field between Trojan Premium line S.G. values and Trojan >Signature line S.G. values. They are now identical. Only Trojan IND line >S.G. remain at 1.260 . > > >? During the beginning of the life of the battery, an optimized development >process of the plates porosity will take place to maximize the surface access >contact between the electrolyte and the lead sulfate crystal within Trojan >proprietary exclusive paste formulation. This optimum moisture of the active >material at the beginning of the battery life is the continuation of an >advanced factory-controlled 72-hour curing process and increase the electrical >conductivity and improved discharge performance of the active material paste, >resulting in Trojan's proven both sustained capacity and total overall >ampere-hours, resulting in more operating power. The variation can reflect >approximately 7 points in the S.G. > > >? The date code can be found on the negative terminal and consist of one >letter and one figure. The figure for 2012 is "2". Any date code from and >after "E2" (i.e. Code date with letter E2, F2, G2,...) > >will have a nominal S.G. of 1.280 . Prior that, the nominal S.G. was 1,260. > >I hope that helps, > >John > > > >John F. DeBoever >Global Technical & Projects Director - Renewable Energy >Trojan Battery Company > >12380 Clark Street >Santa Fe Springs, CA 90670 >Tel: +1-562-236-3000 Ext. 3139 >Cell: +1-845-514-7600 - NY office time zone: USA EST (GMT-5) >Skype: john.f.deboever >Fax: +1-562-236-3239 >jdeboe...@trojanbattery.com<mailto:jdeboe...@trojanbattery.com> >www.trojanbattery.com<http://www.trojanbattery.com/> > >From: re-wrenches-boun...@lists.re-wrenches.org >[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Sequoya Cross >Sent: Thursday, August 30, 2012 3:08 PM >To: re-wrenches@lists.re-wrenches.org >Subject: [RE-wrenches] Trojan L-16 SG Readings- Did Something Change? > >We are wondering if anybody knows when the Trojan L-16RE-B batteries went from >full SG readings of 1.265 (after an 18 month "plate forming" period) to 1.280 >that they now state on the data sheet. We have been having customers use 1.250 >as a full reading which would gradually increase over time to 1.265 and that >might take/might not be seen for 18 months. Now we see that a "full reading" >should be 1.280 and maybe still a "plate forming" period or maybe not? Does >anyone know the date code that we can use with customers to see what they >should be looking for (should have been somewhere between 2010 and 2012)? I >have this question out to Trojan as well, but haven't received confirmation >and wanted to know what data you all were seeing as well. > >Thanks- > >Sequoya Cross >1589 Rapid Lightning Creek Rd >Sandpoint, Idaho 83864 >www.backwoodssolar.com<http://www.backwoodssolar.com/> >Phone(208)263-4290 >Fax (888) 273-8279 > >We are an online and catalog business that caters to off-grid and grid-tie >customers, with technicians that own and operate a variety of renewable energy >systems using the products that we sell. We take great pride in getting to >know our products so that we can recommend the best for our customers. > > > > > > >This e-mail message and any attachments that accompany it may contain >information that is confidential, privileged, or protected from disclosure. >It is intended solely for the use of the individual(s) to whom it was intended >to be addressed. If you have received this e-mail by mistake, or you are not >the intended recipient, any reading, disclosure, copying or other use of this >communication is strictly prohibited. If you have received this communication >in error, please immediately advise the sender at their phone number listed >above, or by electronic mail, and also permanently delete the original and all >copies of this e-mail and any attachments from all locations. Thank you. > >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120831/4f68e518/attachment-0001.htm> > >------------------------------ > >Message: 5 >Date: Fri, 31 Aug 2012 15:53:54 -0700 >From: <d...@foxfire-energy.com> >To: re-wrenches@lists.re-wrenches.org >Subject: [RE-wrenches] Battery Specialist >Message-ID: > > <20120831155354.720a661d8db719b1f2ad39509c9edaa3.a0c674c5df....@email14.secureserver.net> > >Content-Type: text/plain; charset="us-ascii" > >An HTML attachment was scrubbed... >URL: ><http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120831/174f2212/attachment-0001.htm> > >------------------------------ > >Message: 6 >Date: Fri, 31 Aug 2012 18:57:39 -0400 >From: "bob ellison" <reelli...@gmail.com> >To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org> >Subject: Re: [RE-wrenches] Battery Specialist >Message-ID: <00f801cd87cc$068092a0$1381b7e0$@com> >Content-Type: text/plain; charset="utf-8" > >I wire them thru bus bars now, but in the past before I did that I used to >move them around occasionally. > > > >Later, > >Bob > > > >From: re-wrenches-boun...@lists.re-wrenches.org >[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of >d...@foxfire-energy.com >Sent: Friday, August 31, 2012 6:54 PM >To: re-wrenches@lists.re-wrenches.org >Subject: [RE-wrenches] Battery Specialist > > > >Hi Guys, Seems my "Battery Specialist" is back. Yes, this is the same guy that >convinced a few of my customers that most installers are clueless because we >clean terminals with a wire brush instead of a razor blade (and don't believe >in desulphators). Now it seems he's telling folks that batteries should >always be operated in the exact Sequence in which they were originally >configured. i.e. #1 in the string should always be #1, #2 should always be #2 >etc. I've been suggesting to folks (who still run multi string set ups) that >they physically mix up their batteries periodically (at least once mid life >cycle), to manually alter high resistance current paths. Call me old fashion, >but I'm of the impression that only Kirchhoff's Laws apply here. Am I missing >something - again? Thanks db > > > > >Dan Brown >Foxfire Energy Corp. >Renewable Energy Systems >(802)-483-2564 >www.Foxfire-Energy.com >NABCEP #092907-44 > >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120831/a071aa76/attachment-0001.htm> > >------------------------------ > >Message: 7 >Date: Fri, 31 Aug 2012 21:43:41 -0600 >From: R Ray Walters <r...@solarray.com> >To: RE-wrenches <re-wrenches@lists.re-wrenches.org> >Subject: Re: [RE-wrenches] Ballasted Roof Racking Recommendations? >Message-ID: <4a49bd16-8a0c-4037-8033-aecb1924b...@solarray.com> >Content-Type: text/plain; charset="windows-1252" > >Sunpower has just that. Very easy install, no grounding issues, super high >efficiency. Downsides: expensive, Plastic, finicky layouts from their >engineers that preclude using it on smaller roofs. > > I would use it again for a larger roof that needed to max out the output/ sq > ft of roof. It's probably the best commercially available module in the > world, definitely the most efficient. Last I checked it qualified as > American made, though some of it is made in indonesia I believe. > >Ray Walters > >On Aug 31, 2012, at 1:36 PM, Bill Hoffer wrote: > >> Ryan >> >> I do not think that they have a 30 degree option, but I have been pretty >> impressed with Dynoraxx tool-less approach and using fiberglass >> non-conductive material ( read no grounding of racking). Now all we need is >> a fiberglass non-conducting module frame! >> >> Bill Hoffer >> >> On Fri, Aug 31, 2012 at 12:17 PM, Dana Brandt <d...@ecotechenergy.com> wrote: >> We just did a system on 10 degree AET and liked it. I think they have a 30 >> degree option. I'd be worried about inter-row shading, though. >> >> The DPW POWER-FAB BRM has more flexibility with row spacing, but I found it >> to be pretty expensive. >> >> Dana >> >> Dana Brandt >> Ecotech Energy Systems, LLC >> www.ecotechenergy.com >> d...@ecotechenergy.com >> 360.318.7646 >> >> >> On Tue, Aug 28, 2012 at 1:56 PM, Glenn Burt <glenn.b...@glbcc.com> wrote: >> Hi Ryan, >> >> >> >> We have used the AET Rayport stainless steel ballasted racking system on >> dozens of installations and have been quite satisfied with the light ballast >> required (all open racking), integral module grounding, lightweight of >> materials (pressed stainless steel) and quickness of assembly. >> >> >> >> http://aetenergy.com/products/RAYPORT-B-solar-mount-solution >> >> >> >> Glenn Burt >> >> glb, Consulting Company >> >> >> >> From: re-wrenches-boun...@lists.re-wrenches.org >> [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ryan Harkins >> Sent: Tuesday, August 28, 2012 2:32 PM >> To: RE-wrenches >> Subject: [RE-wrenches] Ballasted Roof Racking Recommendations? >> >> >> >> Anyone have recommendations for a ballasted roof racking manufacturer? >> Tilts of 30-degrees or more would be best. >> >> >> >> Ryan Harkins >> NABCEP Certified Solar PV Installer / >> Project Manager >> >> >> >> >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> >> >> >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> >> >> >> >> >> -- >> Bill Hoffer PE >> NABCEP Certified Solar PV Installer? >> Sunergy Engineering Services PLLC >> 2504 Columbia Ave NW >> East Wenatchee WA 98802-3941 >> suneng...@gmail.com Cell:(509)679-6165 >> >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> > >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120831/5c3bdff2/attachment-0001.htm> > >------------------------------ > >Message: 8 >Date: Fri, 31 Aug 2012 22:13:12 -0600 >From: benn kilburn <b...@daystarsolar.ca> >To: RE-wrenches <re-wrenches@lists.re-wrenches.org> >Subject: Re: [RE-wrenches] Ballasted Roof Racking Recommendations? >Message-ID: <cc66e6e6.1c1ed%b...@daystarsolar.ca> >Content-Type: text/plain; charset="us-ascii" > >Ray, >Are those the BIPV ones? >Can you provide a model or a link? >Thanks, >Benn > >DayStar Renewable Energy Inc. >www.daystarsolar.ca * Ph: 780-906-7807 >Construction Electrician Solar Photovoltaic Systems Certified >Certificate # 0007S >HAVE A SUNNY DAY > >On 31/08/12 9:43 PM, "R Ray Walters" <r...@solarray.com> wrote: > >Sunpower has just that. Very easy install, no grounding issues, super high >efficiency. Downsides: expensive, Plastic, finicky layouts from their >engineers that preclude using it on smaller roofs. > > I would use it again for a larger roof that needed to max out the output/ >sq ft of roof. It's probably the best commercially available module in the >world, definitely the most efficient. Last I checked it qualified as >American made, though some of it is made in indonesia I believe. > >Ray Walters > > >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120831/93b002ff/attachment-0001.htm> > >------------------------------ > >Message: 9 >Date: Fri, 31 Aug 2012 23:19:01 -0500 >From: David Brearley <david.brear...@solarprofessional.com> >To: RE-wrenches <re-wrenches@lists.re-wrenches.org> >Subject: Re: [RE-wrenches] Ballasted Roof Racking Recommendations? >Message-ID: > <bb29b71e-1b20-4336-8940-58fc9c382...@solarprofessional.com> >Content-Type: text/plain; charset="us-ascii" > >Here's a link: > >http://us.sunpowercorp.com/commercial/products-services/rooftop-solar-systems/T5/ > >On Aug 31, 2012, at 11:13 PM, benn kilburn wrote: > >> Ray, >> Are those the BIPV ones? >> Can you provide a model or a link? >> Thanks, >> Benn >> >> DayStar Renewable Energy Inc. >> www.daystarsolar.ca * Ph: 780-906-7807 >> Construction Electrician Solar Photovoltaic Systems Certified >> Certificate # 0007S >> HAVE A SUNNY DAY >> >> On 31/08/12 9:43 PM, "R Ray Walters" <r...@solarray.com> wrote: >> >> Sunpower has just that. Very easy install, no grounding issues, super high >> efficiency. Downsides: expensive, Plastic, finicky layouts from their >> engineers that preclude using it on smaller roofs. >> >> I would use it again for a larger roof that needed to max out the output/ >> sq ft of roof. It's probably the best commercially available module in the >> world, definitely the most efficient. Last I checked it qualified as >> American made, though some of it is made in indonesia I believe. >> >> Ray Walters >> > >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120831/af4e5d7e/attachment-0001.htm> > >------------------------------ > >Message: 10 >Date: Sat, 1 Sep 2012 08:35:25 -0400 >From: "Rich Nicol" <r...@solartechvt.com> >To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org> >Subject: [RE-wrenches] Grid tie with BB >Message-ID: <002801cd883e$46cc33b0$d4649b10$@solartechvt.com> >Content-Type: text/plain; charset="us-ascii" > >Wrenches, > >I'm have a mental block with battery backup systems such as the Outback >Radian. Perhaps someone can help me get over it! > >Essentially these systems sell back power off the top of the battery bank >and the array is maintaining the state of charge of the battery bank through >traditional charge controllers. If you have a modest battery bank sized for >limited use on critical circuits and a good size array for the benefit of >net metering I would think it would be necessary to limit the current the >charge controllers are capable of delivering to the battery bank to prevent >damage to the batteries when the controllers are Bulking or Absorbing, but >then it would seem that we limiting the utility of the larger array. If the >current from the controllers was not limited they will self-limit as voltage >rises, plus I suppose they will mostly be in float mode except when the >batteries are cycled but again it seems that we are limiting the capability >of the array compared to a straight grid tied system with a traditional grid >tied only inverter. > >An example would be a 8000 watt array using a couple of flexmax80 >controllers with a string of 8 - L16 AGMs feeding a Radian. > >What am I missing here? > >Thanks > >Rich > > > >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120901/218a4b76/attachment-0001.htm> > >------------------------------ > >Message: 11 >Date: Sat, 1 Sep 2012 10:43:07 -0600 >From: "Larry Crutcher, Starlight Solar Power Systems" > <la...@starlightsolar.com> >To: RE-wrenches <re-wrenches@lists.re-wrenches.org> >Subject: Re: [RE-wrenches] Grid tie with BB >Message-ID: <b2a9b879-b459-49d8-a5c6-b171d6579...@starlightsolar.com> >Content-Type: text/plain; charset="windows-1252" > >Rich, > >In your example you have 8kW feeding a 20kWh battery (assuming 400AH bat). >This is about 0.4C charge rate. If these were flooded batteries, I might >consider limiting bulk current to 0.2C because in standby use they do not need >to be fully recharged in one day. Slow battery charging promotes longer life. > >Since you mention that these are AGM I would not worry about the excess >current, especially in a stand by configuration. Some AGM manufacturers >publish that you can provide charge current up to 5C without harm. For your >bank that would be 2000 amps at 57Vdc! I believe all good quality AGM's can >withstand high bulk charge currents because of the efficient way hydrogen and >oxygen are recombined. Controlling voltage is the more important factor. So I >don't think you are missing anything. > >Larry Crutcher >Starlight Solar Power Systems > > > > >On Sep 1, 2012, at 6:35 AM, Rich Nicol wrote: > >Wrenches, >I?m have a mental block with battery backup systems such as the Outback >Radian. Perhaps someone can help me get over it! >Essentially these systems sell back power off the top of the battery bank and >the array is maintaining the state of charge of the battery bank through >traditional charge controllers. If you have a modest battery bank sized for >limited use on critical circuits and a good size array for the benefit of net >metering I would think it would be necessary to limit the current the charge >controllers are capable of delivering to the battery bank to prevent damage to >the batteries when the controllers are Bulking or Absorbing, but then it would >seem that we limiting the utility of the larger array. If the current from the >controllers was not limited they will self-limit as voltage rises, plus I >suppose they will mostly be in float mode except when the batteries are cycled >but again it seems that we are limiting the capability of the array compared >to a straight grid tied system with a traditional grid tied only inverter. >An example would be a 8000 watt array using a couple of flexmax80 controllers >with a string of 8 - L16 AGMs feeding a Radian. >What am I missing here? >Thanks >Rich > >_______________________________________________ >List sponsored by Home Power magazine > >List Address: RE-wrenches@lists.re-wrenches.org > >Options & settings: >http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > >List-Archive: >http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > >List rules & etiquette: >www.re-wrenches.org/etiquette.htm > >Check out participant bios: >www.members.re-wrenches.org > > >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120901/f2173332/attachment-0001.htm> > >------------------------------ > >_______________________________________________ >List sponsored by Home Power magazine > >List Address: RE-wrenches@lists.re-wrenches.org > >Options & settings: >http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > >List-Archive: >http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > >List rules & etiquette: >www.re-wrenches.org/etiquette.htm > >Check out participant bios: >www.members.re-wrenches.org > > > >End of RE-wrenches Digest, Vol 5, Issue 275 >******************************************* _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
