Or a charger such as Iota, or power max. Jay Peltz power.
> On Mar 3, 2020, at 7:24 PM, d...@energysolarnow.com wrote: > > > You wrote that you would connect the Exeltech to just one of the service > phases. > But most GT inverters are 240 and require both phases. Is yours different? > You did not mention which model it is. > Also, as Kent Osterberg mentioned, the Exeltech will not charge its batteries > from the AC output. > Your scheme with the PLC controlling an SCR leaves unaddressed how any charge > current gets directed into the batteries to allegedly raise their voltage. Is > there a charger somewhere in this scheme? > You still need some way to charge batteries from solar. How about connecting > a charge controller to some of the solar panels? > > Don Barch > Energy Solar > -------- Original Message -------- > Subject: RE-wrenches Digest, Vol 13, Issue 59 > From: re-wrenches-requ...@lists.re-wrenches.org > Date: Sun, March 01, 2020 2:19 pm > To: re-wrenches@lists.re-wrenches.org > > 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. OK, so what iwould happen if I do this... (Mark Frye) > 2. Re: OK, so what iwould happen if I do this... (frenergy) > 3. Re: OK, so what iwould happen if I do this... (Kent Osterberg) > 4. Re: OK, so what iwould happen if I do this... (Jerry Shafer) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 29 Feb 2020 15:27:32 -0800 > From: Mark Frye <ma...@berkeleysolar.com> > To: RE-wrenches <re-wrenches@lists.re-wrenches.org> > Subject: [RE-wrenches] OK, so what iwould happen if I do this... > Message-ID: <93731c38-40b5-7c63-1d74-a879fbdd9...@berkeleysolar.com> > Content-Type: text/plain; charset=utf-8; format=flowed > > I have 2kw of grid tied PV on my house. > > Suppose I: > > - Open the main breaker to disconnect from the grid > > - I open the PV breaker > > - I connect a small good quality inverter like an Exeltech XP 500 to one > of the phases of the service (120 VAC) > > - I put a small battery pack, 100 AH at 24 VDC on the inverter > > OK so far, I could run some small loads for a relatively short period of > time before the batteries get low > > -I have a PLC with an AD input and DA output. On the input I measure the > battery voltage, on the output I control a SCR. The SCR controls a 2kw > immersion heater sitting in a big bucket of water. The PLC has a scan > time of 2 mS and I program it to increase the duty cycle of the SCR as > voltage of the battery rises above 24 VDC. > > OK so far nothing has really changed from above. > > - I close the PV breaker, the GT inverters see the battery inverter, > sync and connect after five minutes. > > Voila, I can run house loads from 0 to 2kw with my existing GT PV with > the balance of energy dumped as needed to the immersion heater. > > Right? > > Mark Frye > > > > ------------------------------ > > Message: 2 > Date: Sun, 1 Mar 2020 06:26:27 -0800 > From: frenergy <frene...@psln.com> > To: re-wrenches@lists.re-wrenches.org > Subject: Re: [RE-wrenches] OK, so what iwould happen if I do this... > Message-ID: <c97234cd-4441-34d7-740c-51f07837b...@psln.com> > Content-Type: text/plain; charset=utf-8; format=flowed > > Mark, > > ??? ??? ??? OR, you change-out your inverter to an SMA with Secure > Power Supply and during grid power outage, while there is some sun on > the panels, you would have up to 2KW of 120VAC power on the SPS circuit > by just flipping a switch. We usually install a 4X outdoor box with a > 120 VAC outlet ganged with a switch right under the inverter and let the > customer run the power to the : frig, lights, battery charger, TV or > whatever during an outage, though some romex could be run to close to > the frig. > > Bill > > Feather River Solar Electric > Bill Battagin, Owner > 4291 Nelson St. > Taylorsville, CA 95983 > 530.284.7849 > CA Lic 874049 > www.frenergy.net > > On 2/29/2020 3:27 PM, Mark Frye wrote: > > I have 2kw of grid tied PV on my house. > > > > Suppose I: > > > > - Open the main breaker to disconnect from the grid > > > > - I open the PV breaker > > > > - I connect a small good quality inverter like an Exeltech XP 500 to > > one of the phases of the service (120 VAC) > > > > - I put a small battery pack, 100 AH at 24 VDC on the inverter > > > > OK so far, I could run some small loads for a relatively short period > > of time before the batteries get low > > > > -I have a PLC with an AD input and DA output. On the input I measure > > the battery voltage, on the output I control a SCR. The SCR controls a > > 2kw immersion heater sitting in a big bucket of water. The PLC has a > > scan time of 2 mS and I program it to increase the duty cycle of the > > SCR as voltage of the battery rises above 24 VDC. > > > > OK so far nothing has really changed from above. > > > > - I close the PV breaker, the GT inverters see the battery inverter, > > sync and connect after five minutes. > > > > Voila, I can run house loads from 0 to 2kw with my existing GT PV with > > the balance of energy dumped as needed to the immersion heater. > > > > Right? > > > > Mark Frye > > > > _______________________________________________ > > List sponsored by Redwood Alliance > > > > List Address: RE-wrenches@lists.re-wrenches.org > > > > Change listserver email address & settings: > > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > > > List-Archive: > > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > > > List rules & etiquette: > > www.re-wrenches.org/etiquette.htm > > > > Check out or update participant bios: > > www.members.re-wrenches.org > > > > > -- > > > -- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > > > > ------------------------------ > > Message: 3 > Date: Sun, 1 Mar 2020 08:58:45 -0800 > From: Kent Osterberg <k...@coveoregon.com> > To: re-wrenches@lists.re-wrenches.org > Subject: Re: [RE-wrenches] OK, so what iwould happen if I do this... > Message-ID: <9e32901e-c5d4-ff70-9c44-406cc6d48...@coveoregon.com> > Content-Type: text/plain; charset=utf-8; format=flowed > > Mark, > > I believe that your plan would fail because you are forcing power to > flow through the XP inverter backwards to charge the batteries. I don't > believe the XP inverter can do that. The grid tied inverter would > probably connect then immediately shut down, or connect and immediately > ruin the XP inverter. It would work if you had a inverter with a > bidirectional architecture like a Magnum, Outback, or Schneider > inverter. But even then you'd have a hazardous situation because the > cooling water is going to evaporate. > > Kent Osterberg > Blue Mountain Solar > > > On 2/29/2020 3:27 PM, Mark Frye wrote: > > I have 2kw of grid tied PV on my house. > > > > Suppose I: > > > > - Open the main breaker to disconnect from the grid > > > > - I open the PV breaker > > > > - I connect a small good quality inverter like an Exeltech XP 500 to > > one of the phases of the service (120 VAC) > > > > - I put a small battery pack, 100 AH at 24 VDC on the inverter > > > > OK so far, I could run some small loads for a relatively short period > > of time before the batteries get low > > > > -I have a PLC with an AD input and DA output. On the input I measure > > the battery voltage, on the output I control a SCR. The SCR controls a > > 2kw immersion heater sitting in a big bucket of water. The PLC has a > > scan time of 2 mS and I program it to increase the duty cycle of the > > SCR as voltage of the battery rises above 24 VDC. > > > > OK so far nothing has really changed from above. > > > > - I close the PV breaker, the GT inverters see the battery inverter, > > sync and connect after five minutes. > > > > Voila, I can run house loads from 0 to 2kw with my existing GT PV with > > the balance of energy dumped as needed to the immersion heater. > > > > Right? > > > > Mark Frye > > > > _______________________________________________ > > List sponsored by Redwood Alliance > > > > List Address: RE-wrenches@lists.re-wrenches.org > > > > Change listserver email address & settings: > > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > > > List-Archive: > > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > > > List rules & etiquette: > > www.re-wrenches.org/etiquette.htm > > > > Check out or update participant bios: > > www.members.re-wrenches.org > > > > > > > > ------------------------------ > > Message: 4 > Date: Sun, 1 Mar 2020 07:31:36 -1000 > From: Jerry Shafer <jerrysgarag...@gmail.com> > To: RE-wrenches <re-wrenches@lists.re-wrenches.org> > Subject: Re: [RE-wrenches] OK, so what iwould happen if I do this... > Message-ID: > <camufgmvybnmmzge__tjds9xpfsou59jdf3wwskfhjw291vg...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Mark > What you are saying is to AC couple but most likely this would fail as your > battery fills not enough loads HBCO or to much loads and your battery does > a LBCO, either way you would be better off spending the money in a maybe a > Outback Skybox easy install and is high voltage PV input and even a small > 48 volt bank but think about storage > Jerry > > On Sat, Feb 29, 2020 at 1:27 PM Mark Frye <ma...@berkeleysolar.com> wrote: > > > I have 2kw of grid tied PV on my house. > > > > Suppose I: > > > > - Open the main breaker to disconnect from the grid > > > > - I open the PV breaker > > > > - I connect a small good quality inverter like an Exeltech XP 500 to one > > of the phases of the service (120 VAC) > > > > - I put a small battery pack, 100 AH at 24 VDC on the inverter > > > > OK so far, I could run some small loads for a relatively short period of > > time before the batteries get low > > > > -I have a PLC with an AD input and DA output. On the input I measure the > > battery voltage, on the output I control a SCR. The SCR controls a 2kw > > immersion heater sitting in a big bucket of water. The PLC has a scan > > time of 2 mS and I program it to increase the duty cycle of the SCR as > > voltage of the battery rises above 24 VDC. > > > > OK so far nothing has really changed from above. > > > > - I close the PV breaker, the GT inverters see the battery inverter, > > sync and connect after five minutes. > > > > Voila, I can run house loads from 0 to 2kw with my existing GT PV with > > the balance of energy dumped as needed to the immersion heater. > > > > Right? > > > > Mark Frye > > > > _______________________________________________ > > List sponsored by Redwood Alliance > > > > List Address: RE-wrenches@lists.re-wrenches.org > > > > Change listserver email address & settings: > > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > > > List-Archive: > > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > > > List rules & etiquette: > > www.re-wrenches.org/etiquette.htm > > > > Check out or update 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/20200301/a993182d/attachment-0001.html> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > ------------------------------ > > End of RE-wrenches Digest, Vol 13, Issue 59 > ******************************************* > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/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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