Re: [RE-wrenches] Using legacy modules on micro-inverters
Dan: Thanks very much for the detailed analysis. So the short answer is that a 48 v micro-inverter will be compatible with either module. I am old school and like a little more head room than that, especially since we have not learned yet if inverter damage will occur on overvoltage. I am anxious to try the Power One units. Anyone else tried these yet? William -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Exeltech Sent: Monday, September 30, 2013 6:01 PM To: RE-wrenches Subject: Re: [RE-wrenches] Using legacy modules on micro-inverters William, PV temperature coefficient of voltage is a function of the number of cells in series. For 72 cell PV (or two 36-cell PV in series), the coefficient is 2X that of 36 cells. Two SP75 in series, in an ambient temperature environment of -10C, and presuming a cell temperature of -10C at reduced light and a low solar altitude to minimize cell heating, would exhibit nominally 45.4Voc, and 35.6Vmpp respectively. Two SP75 in series, in an ambient temperature environment of 38C, and presuming 1000 W/m^2 orthogonal to the PV module at solar noon, would yield nominally 36.6Voc, and 28.7Vmpp respectively. Nominal cell temperature under the latter circumstances would be 69.3C, presuming a rooftop mount, 6-8" above the roof surface, with 1.5 m/s or less wind speed, and perfectly orthogonal to the sun at solar zenith. Two SQ150 under the identical cold ambient conditions would exhibit 44.4 Voc, and 34.8Vmpp. Two SQ150 under the identical hot ambient conditions would exhibit 36.1Voc, and 28.3Vmpp. Nominal cell temperature for the SQ150 under the latter circumstances would be 70.5C, with the same presumptions as above. Very slight differences exist between two SP75 in series, and one SQ150, but as you alluded to below, they're close enough to be considered essentially identical. Regards, Dan ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & 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
Re: [RE-wrenches] Using legacy modules on micro-inverters
William, PV temperature coefficient of voltage is a function of the number of cells in series. For 72 cell PV (or two 36-cell PV in series), the coefficient is 2X that of 36 cells. Two SP75 in series, in an ambient temperature environment of -10C, and presuming a cell temperature of -10C at reduced light and a low solar altitude to minimize cell heating, would exhibit nominally 45.4Voc, and 35.6Vmpp respectively. Two SP75 in series, in an ambient temperature environment of 38C, and presuming 1000 W/m^2 orthogonal to the PV module at solar noon, would yield nominally 36.6Voc, and 28.7Vmpp respectively. Nominal cell temperature under the latter circumstances would be 69.3C, presuming a rooftop mount, 6-8" above the roof surface, with 1.5 m/s or less wind speed, and perfectly orthogonal to the sun at solar zenith. Two SQ150 under the identical cold ambient conditions would exhibit 44.4 Voc, and 34.8Vmpp. Two SQ150 under the identical hot ambient conditions would exhibit 36.1Voc, and 28.3Vmpp. Nominal cell temperature for the SQ150 under the latter circumstances would be 70.5C, with the same presumptions as above. Very slight differences exist between two SP75 in series, and one SQ150, but as you alluded to below, they're close enough to be considered essentially identical. Regards, Dan On Mon, 9/30/13, William Miller wrote: Subject: Re: [RE-wrenches] Using legacy modules on micro-inverters To: "'RE-wrenches'" Date: Monday, September 30, 2013, 2:24 PM Nick: What is the upper voltage limit for the M250? What happens when that voltage is exceeded? I am trying to use Siemens SP75 modules (two in series) and Shell SQ-150-PC. Below are the specs. Note that two SP75s in series, if you multiply the voltages by two, is identical to the SQ-150 except for the temperature compensation. I am not sure what to do with the temperature compensation value if I put two SP175s insereis. Do you know? Our record low is -10 C and average high is 38C. If I enter the data for the Shell, the calculator shows they are compatible with the M250. Entering the data for two SP75s using -0.077 for Temp Comp (SP75) the tool says not. If I use double (-0.154), then the two SP75s are compatible. What is your determination? Thanks, William From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Nick Soleil Sent: Monday, September 30, 2013 9:56 AM To: RE-wrenches Subject: Re: [RE-wrenches] Using legacy modules on micro-inverters Hi wrenches,The M250 is not limited to 60 cell modules only. The M250 has an expanded voltage window which will allow for it to be paired with a wider range of modules. Enphase has an online module compatibility calculator which can be used for checking a specific pairing in a specific location, at: http://enphase.com/module-compatibility-calculator-m250-update/. Keep in mind that many of the high efficiency, higher voltage, 72 cell modules will not be compatible. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & 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
Re: [RE-wrenches] Using legacy modules on micro-inverters
Hi Wiliam, The max voltage rating of the M250 is 48V. When you ran the compatibility checker, did you use 154mv/°C? You can either input the mV/°C or the %/°C. You will need to be sure that you convert the 0.154 to 154mV. On Mon, Sep 30, 2013 at 12:24 PM, William Miller wrote: > Nick: > > ** ** > > What is the upper voltage limit for the M250? What happens when that > voltage is exceeded? > > ** ** > > I am trying to use Siemens SP75 modules (two in series) and Shell > SQ-150-PC. Below are the specs. Note that two SP75s in series, if you > multiply the voltages by two, is identical to the SQ-150 except for the > temperature compensation. I am not sure what to do with the temperature > compensation value if I put two SP175s insereis. Do you know? > > ** ** > > ** ** > > *Qty* > > *Watts* > > *Ext* > > *Watts* > > *Pmax* > > *Vpmax* > > *Ipmax* > > *Isc* > > *Voc* > > *Temp Coefficient of Voc* > > Siemens PC4JF (Same as the SP75?) > > 12 > > 75 > > 900 > > 75 > > 75 > > 17 > > 4.4 > > 4.8 > > 21.7 > > -0.077 > > Shell SQ-150 > > 3 > > 150 > > 450 > > 150 > > 150 > > 34 > > 4.4 > > 4.8 > > 43.4 > > -0.161 > > ** ** > > Our record low is -10 C and average high is 38C. > > ** ** > > If I enter the data for the Shell, the calculator shows they are > compatible with the M250. Entering the data for two SP75s using -0.077 for > Temp Comp (SP75) the tool says not. If I use double (-0.154), then the two > SP75s are compatible. What is your determination? > > ** ** > > Thanks,**** > > ** ** > > William**** > > ** ** > > ** ** > > ** ** > > *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto: > re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Nick Soleil > *Sent:* Monday, September 30, 2013 9:56 AM > *To:* RE-wrenches > *Subject:* Re: [RE-wrenches] Using legacy modules on micro-inverters > > ** ** > > Hi wrenches, > > The M250 is not limited to 60 cell modules only. The M250 has an expanded > voltage window which will allow for it to be paired with a wider range of > modules. Enphase has an online module compatibility calculator which can > be used for checking a specific pairing in a specific location, at: > > http://enphase.com/module-compatibility-calculator-m250-update/. > > Keep in mind that many of the high efficiency, higher voltage, 72 cell > modules will not be compatible. > > ** ** > > ** ** > > On Sat, Sep 28, 2013 at 6:45 AM, Jay Peltz wrote: > > Hi Bill > > ** ** > > Is there a new M250? > > Enphase shows the 250 at 48vdc max and states 60 cell only modules. > > ** ** > > That would be nice if it did both > > ** ** > > Jay > > ** ** > > Peltz power. > > ** ** > > ___ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Change email address & 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 > > > -- Cordially, *Nick Soleil* *Field Applications Engineer * *Enphase Energy* Mobile: (707) 321-2937 ** *Enphase Commercial Solar.* *Limitless.*<http://www.enphase.com/commercial?utm_source=email&utm_medium=sig&utm_campaign=Comm2012> * *<http://www.enphase.com/commercial?utm_source=email&utm_medium=sig&utm_campaign=Comm2012> 1420 North McDowell Petaluma, CA 94954 www.enphase.com <http://www.enphaseenergy.com/> P: (707) 763-4784 x7267 F: (707) 763-0784 E: nsol...@enphaseenergy.com [image: nabcep logo] Certified Solar PV Installer #03262011-300 “Don’t get me wrong: I love nuclear energy! It’s just that I prefer fusion to fission. And it just so happens that there’s an enormous fusion reactor safely banked a few million miles from us. It delivers more than we could ever use in just about 8 minutes. And it’s wireless! .” - William McDonough This email message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. If you are not an intended recipient, you may not review, use, copy, disclose or distribute this message. If you received this message in error, please contact the sender by reply email and destroy all copies of the original message. <>___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & 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
Re: [RE-wrenches] Using legacy modules on micro-inverters
Nick: What is the upper voltage limit for the M250? What happens when that voltage is exceeded? I am trying to use Siemens SP75 modules (two in series) and Shell SQ-150-PC. Below are the specs. Note that two SP75s in series, if you multiply the voltages by two, is identical to the SQ-150 except for the temperature compensation. I am not sure what to do with the temperature compensation value if I put two SP175s insereis. Do you know? Qty Watts Ext Watts Pmax Vpmax Ipmax Isc Voc Temp Coefficient of Voc Siemens PC4JF (Same as the SP75?) 12 75 900 75 75 17 4.4 4.8 21.7 -0.077 Shell SQ-150 3 150 450 150 150 34 4.4 4.8 43.4 -0.161 Our record low is -10 C and average high is 38C. If I enter the data for the Shell, the calculator shows they are compatible with the M250. Entering the data for two SP75s using -0.077 for Temp Comp (SP75) the tool says not. If I use double (-0.154), then the two SP75s are compatible. What is your determination? Thanks, William From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Nick Soleil Sent: Monday, September 30, 2013 9:56 AM To: RE-wrenches Subject: Re: [RE-wrenches] Using legacy modules on micro-inverters Hi wrenches, The M250 is not limited to 60 cell modules only. The M250 has an expanded voltage window which will allow for it to be paired with a wider range of modules. Enphase has an online module compatibility calculator which can be used for checking a specific pairing in a specific location, at: http://enphase.com/module-compatibility-calculator-m250-update/. Keep in mind that many of the high efficiency, higher voltage, 72 cell modules will not be compatible. On Sat, Sep 28, 2013 at 6:45 AM, Jay Peltz wrote: Hi Bill Is there a new M250? Enphase shows the 250 at 48vdc max and states 60 cell only modules. That would be nice if it did both Jay Peltz power. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & 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
Re: [RE-wrenches] Using legacy modules on micro-inverters
Hi wrenches, The M250 is not limited to 60 cell modules only. The M250 has an expanded voltage window which will allow for it to be paired with a wider range of modules. Enphase has an online module compatibility calculator which can be used for checking a specific pairing in a specific location, at: http://enphase.com/module-compatibility-calculator-m250-update/. Keep in mind that many of the high efficiency, higher voltage, 72 cell modules will not be compatible. On Sat, Sep 28, 2013 at 6:45 AM, Jay Peltz wrote: > Hi Bill > > Is there a new M250? > Enphase shows the 250 at 48vdc max and states 60 cell only modules. > > That would be nice if it did both > > Jay > > Peltz power. > > > > Sent from my iPhone > > On Sep 27, 2013, at 10:14 AM, "Bill Brooks" wrote: > > William, > > ** ** > > Just to add one more thing. I said that the M215 does not match well, but > if you have them on hand, they would still work. You will probably power > limit in the spring and fall, but the rest of the year you will probably do > fine. The M250 has a higher operating voltage for 72-cell arrangements. The > M215 is more suited for 60-cell modules and circuits. > > ** ** > > Bill. > > ** ** > > ** ** > > *From:* re-wrenches-boun...@lists.re-wrenches.org [ > mailto:re-wrenches-boun...@lists.re-wrenches.org] > *On Behalf Of *William Miller > *Sent:* Thursday, September 26, 2013 10:01 PM > *To:* RE-wrenches > *Subject:* [RE-wrenches] Using legacy modules on micro-inverters > > ** ** > > Friends: > > ** ** > > I am trying to upgrade a long time off-grid client to a grid-connected > installation. They have a mix of Siemens PC4JF and Shell SQ-150P modules. > It is my understanding that putting two of the PC4JFs in series is exactly > one SQ-150. I don’t have spec sheets for the PC4JFs but I am told they are > an SP75. If I use the data for the SP75 and multiply the voltages by two I > get exactly a SQ-150P. > > ** ** > > Anyway, putting two 36 modules together makes one 72 cell module. This > would likely work with an Enphase M190 but those are no longer > manufactured. Same with the M215. Power One makes a micro that meets the > predicted voltage window. > > ** ** > > I did this a while ago with pairs of SR100s. It worked great. Anyone try > this with even older modules, like those cited??? > > ** ** > > Thanks in advance. > > ** ** > > William Miller > > ** ** > > ___ > > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Change email address & 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 > > Change email address & 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 > > > -- Cordially, *Nick Soleil* *Field Applications Engineer * *Enphase Energy* Mobile: (707) 321-2937 ** *Enphase Commercial Solar.* *Limitless.*<http://www.enphase.com/commercial?utm_source=email&utm_medium=sig&utm_campaign=Comm2012> * *<http://www.enphase.com/commercial?utm_source=email&utm_medium=sig&utm_campaign=Comm2012> 1420 North McDowell Petaluma, CA 94954 www.enphase.com <http://www.enphaseenergy.com/> P: (707) 763-4784 x7267 F: (707) 763-0784 E: nsol...@enphaseenergy.com [image: nabcep logo] Certified Solar PV Installer #03262011-300 “Don’t get me wrong: I love nuclear energy! It’s just that I prefer fusion to fission. And it just so happens that there’s an enormous fusion reactor safely banked a few million miles from us. It delivers more than we could ever use in just about 8 minutes. And it’s wireless! .” - William McDonough This email message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. If you are not an intended recipient, you may not review, use, copy, disclose or distribute this message. If you received this message in error, please contact the sender by reply email and destroy all copies of
Re: [RE-wrenches] Using legacy modules on micro-inverters
All - If you haven't already seen it, you might want to try playing with the numbers on Enphase's online calculator: http://enphase.com/module-compatibility-calculator-m250-update/ -August *August Goers* Principal Luminalt Energy Corporation o: 415.641.4000 m: 415.559.1525 www.luminalt.com On Sat, Sep 28, 2013 at 6:45 AM, Jay Peltz wrote: > Hi Bill > > Is there a new M250? > Enphase shows the 250 at 48vdc max and states 60 cell only modules. > > That would be nice if it did both > > Jay > > Peltz power. > > > > Sent from my iPhone > > On Sep 27, 2013, at 10:14 AM, "Bill Brooks" wrote: > > William, > > ** ** > > Just to add one more thing. I said that the M215 does not match well, but > if you have them on hand, they would still work. You will probably power > limit in the spring and fall, but the rest of the year you will probably do > fine. The M250 has a higher operating voltage for 72-cell arrangements. The > M215 is more suited for 60-cell modules and circuits. > > ** ** > > Bill. > > ** ** > > ** ** > > *From:* re-wrenches-boun...@lists.re-wrenches.org [ > mailto:re-wrenches-boun...@lists.re-wrenches.org] > *On Behalf Of *William Miller > *Sent:* Thursday, September 26, 2013 10:01 PM > *To:* RE-wrenches > *Subject:* [RE-wrenches] Using legacy modules on micro-inverters > > ** ** > > Friends: > > ** ** > > I am trying to upgrade a long time off-grid client to a grid-connected > installation. They have a mix of Siemens PC4JF and Shell SQ-150P modules. > It is my understanding that putting two of the PC4JFs in series is exactly > one SQ-150. I don’t have spec sheets for the PC4JFs but I am told they are > an SP75. If I use the data for the SP75 and multiply the voltages by two I > get exactly a SQ-150P. > > ** ** > > Anyway, putting two 36 modules together makes one 72 cell module. This > would likely work with an Enphase M190 but those are no longer > manufactured. Same with the M215. Power One makes a micro that meets the > predicted voltage window. > > ** ** > > I did this a while ago with pairs of SR100s. It worked great. Anyone try > this with even older modules, like those cited??? > > ** ** > > Thanks in advance. > > ** ** > > William Miller > > ** ** > > ___ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Change email address & 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 > > Change email address & 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 Change email address & 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
Re: [RE-wrenches] Using legacy modules on micro-inverters
Hi Bill Is there a new M250? Enphase shows the 250 at 48vdc max and states 60 cell only modules. That would be nice if it did both Jay Peltz power. Sent from my iPhone > On Sep 27, 2013, at 10:14 AM, "Bill Brooks" wrote: > > William, > > Just to add one more thing. I said that the M215 does not match well, but if > you have them on hand, they would still work. You will probably power limit > in the spring and fall, but the rest of the year you will probably do fine. > The M250 has a higher operating voltage for 72-cell arrangements. The M215 is > more suited for 60-cell modules and circuits. > > Bill. > > > From: re-wrenches-boun...@lists.re-wrenches.org > [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller > Sent: Thursday, September 26, 2013 10:01 PM > To: RE-wrenches > Subject: [RE-wrenches] Using legacy modules on micro-inverters > > Friends: > > I am trying to upgrade a long time off-grid client to a grid-connected > installation. They have a mix of Siemens PC4JF and Shell SQ-150P modules. > It is my understanding that putting two of the PC4JFs in series is exactly > one SQ-150. I don’t have spec sheets for the PC4JFs but I am told they are > an SP75. If I use the data for the SP75 and multiply the voltages by two I > get exactly a SQ-150P. > > Anyway, putting two 36 modules together makes one 72 cell module. This would > likely work with an Enphase M190 but those are no longer manufactured. Same > with the M215. Power One makes a micro that meets the predicted voltage > window. > > I did this a while ago with pairs of SR100s. It worked great. Anyone try > this with even older modules, like those cited??? > > Thanks in advance. > > William Miller > > ___ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Change email address & 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 Change email address & 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
Re: [RE-wrenches] Using legacy modules on micro-inverters
William, Just to add one more thing. I said that the M215 does not match well, but if you have them on hand, they would still work. You will probably power limit in the spring and fall, but the rest of the year you will probably do fine. The M250 has a higher operating voltage for 72-cell arrangements. The M215 is more suited for 60-cell modules and circuits. Bill. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Thursday, September 26, 2013 10:01 PM To: RE-wrenches Subject: [RE-wrenches] Using legacy modules on micro-inverters Friends: I am trying to upgrade a long time off-grid client to a grid-connected installation. They have a mix of Siemens PC4JF and Shell SQ-150P modules. It is my understanding that putting two of the PC4JFs in series is exactly one SQ-150. I don't have spec sheets for the PC4JFs but I am told they are an SP75. If I use the data for the SP75 and multiply the voltages by two I get exactly a SQ-150P. Anyway, putting two 36 modules together makes one 72 cell module. This would likely work with an Enphase M190 but those are no longer manufactured. Same with the M215. Power One makes a micro that meets the predicted voltage window. I did this a while ago with pairs of SR100s. It worked great. Anyone try this with even older modules, like those cited??? Thanks in advance. William Miller ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & 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
Re: [RE-wrenches] Using legacy modules on micro-inverters
William, Here is what I would recommend. 1. Put pairs of SQ-150s in parallel on an M250. 2. Put PC4JFs as two in series by two in parallel on M250. 3. For leftovers-two PC4JFs in series are the same as one SQ-150 so mix and match to your heart's content. The issue is either getting a paralleling cable for the MC3 connectors or installing J-boxes with cable glands to parallel the sets. This is child's play, but it is fun too. These are just mini PV arrays-no mystery here. You will not overpower the M250 with this arrangement. These modules will have lost 10-20% of their nameplate rating at STC (30% at real power) so no problem with an M250. M215 just does not match well at all. Bill. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Thursday, September 26, 2013 10:01 PM To: RE-wrenches Subject: [RE-wrenches] Using legacy modules on micro-inverters Friends: I am trying to upgrade a long time off-grid client to a grid-connected installation. They have a mix of Siemens PC4JF and Shell SQ-150P modules. It is my understanding that putting two of the PC4JFs in series is exactly one SQ-150. I don't have spec sheets for the PC4JFs but I am told they are an SP75. If I use the data for the SP75 and multiply the voltages by two I get exactly a SQ-150P. Anyway, putting two 36 modules together makes one 72 cell module. This would likely work with an Enphase M190 but those are no longer manufactured. Same with the M215. Power One makes a micro that meets the predicted voltage window. I did this a while ago with pairs of SR100s. It worked great. Anyone try this with even older modules, like those cited??? Thanks in advance. William Miller ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & 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
[RE-wrenches] Using legacy modules on micro-inverters
Friends: I am trying to upgrade a long time off-grid client to a grid-connected installation. They have a mix of Siemens PC4JF and Shell SQ-150P modules. It is my understanding that putting two of the PC4JFs in series is exactly one SQ-150. I don't have spec sheets for the PC4JFs but I am told they are an SP75. If I use the data for the SP75 and multiply the voltages by two I get exactly a SQ-150P. Anyway, putting two 36 modules together makes one 72 cell module. This would likely work with an Enphase M190 but those are no longer manufactured. Same with the M215. Power One makes a micro that meets the predicted voltage window. I did this a while ago with pairs of SR100s. It worked great. Anyone try this with even older modules, like those cited??? Thanks in advance. William Miller ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & 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
