I was wondering about battery charging using Tigos. I have a few spare Tigos and modules for them lying around and was thinking of using them with a magnum to run my radon fan and chest freezer.
Since the Tigos have MPPT built in, would the use of a MPPTing charge controller be unnecessary? If a person used a MPPTing CC what effects would that have on module performance? Also I believe the Tigos need to communicate with the MMU unit to operate. Sent from my iPhone On Oct 15, 2012, at 4:26 PM, Jay Peltz <[email protected]> wrote: > Hi Allan > > I have a client who did indeed install Tigo > with a outback CC and it all works well > > I don't recommend it for the boat. Too much to > go wrong. > > Jay > Peltz power > > Sent from my iPhone > > On Oct 15, 2012, at 12:46 PM, Allan Sindelar <[email protected]> > wrote: > >> Dan, >> I checked out the Tigo website, and found nothing there to suggest that >> these were intended for off grid battery charging applications. A >> round-the-world sailboat is off grid. Are you suggesting that these will >> work in battery charging applications? If so,this is news. Do you have any >> more info you can share with us about this? >> Thanks, Allan >> >> Allan Sindelar >> [email protected] >> NABCEP Certified Photovoltaic Installer >> NABCEP Certified Technical Sales Professional >> New Mexico EE98J Journeyman Electrician >> Founder and Chief Technology Officer >> Positive Energy, Inc. >> 3209 Richards Lane (note new address) >> Santa Fe, New Mexico 87507 >> 505 424-1112 >> www.positiveenergysolar.com >> >> On 10/11/2012 2:58 PM, [email protected] wrote: >>> Check out Tigo Optimizers: >>> >>> http://www.tigoenergy.com/ >>> >>> db >>> Dan Brown >>> Foxfire Energy Corp. >>> Renewable Energy Systems >>> (802)-483-2564 >>> www.Foxfire-Energy.com >>> NABCEP #092907-44 >>> >>> From: [email protected] >>> [mailto:[email protected]] On Behalf Of Allan >>> Sindelar >>> Sent: Thursday, October 11, 2012 1:04 PM >>> To: RE-wrenches >>> Subject: [RE-wrenches] Fwd: Charge control question >>> >>> Wrenches, >>> I'm posting this for Carl Bickford, prof emeritus of the renewable energy >>> training program at San Juan College in Farmington, New Mexico. I'll >>> forward your responses to him. >>> I have a very interesting and talented friend who is rebuilding a >>> blue-water sailboat for a round-the-world trip. He is well versed in solar >>> and is trying to use a relatively large array to charge a big battery bank >>> that will be used for propulsion as well as general electrical. The >>> propulsion system will be backed up with a propane generator he is building >>> himself out of a Toyota truck engine. >>> As you can imagine, there is no place on a sailboat where shading isn’t a >>> problem. He and I were wondering if there were products out there that >>> could MPPT either individual modules, or small groups of them for 12 V >>> battery charging. I have seen such things for the inputs of grid-tied >>> inverters, but nothing yet for off-grid. The other choice is to go with >>> many small MPPT charge controllers like the ones from Solar Converters. >>> Any advice you can offer? >>> Take care, >>> Carl >>> >>> Carl Bickford >>> Professor of Engineering and Renewable Energy >>> San Juan College >>> 4601 College Blvd. >>> Farmington, NM 87402 >>> 505-566-3503 >>> [email protected] >>> >>> I offered the suggestion below. Certainly open to other and better ideas. >>> Allan >>> >>> I have not encountered this situation, so I have no advice from experience. >>> At 12V, it's hardly an issue as it is with high voltage parallel strings, >>> where a few shaded cells can cause a whole string to drop out of the >>> inverter's MPPT. At most, a shaded cell weakens the output of that module. >>> And since it's charging batteries, there's a greater amount of head room. >>> >>> I would suggest looking into Blue Sky Energy's "i" series - smaller MPPT >>> controllers that can be networked. We seldom use them, as our residential >>> applications are different. But you could put a controller on a group of >>> modules and network several together. One advantage, I think (you'd want to >>> check this) is that Blue Sky's MPPT algorithm is analog, unlike Outback and >>> others: on the old Solar Boost series, the MPPT boost was set with a trim >>> pot to a particular voltage above battery voltage; the target is to set it >>> to where the boost was greatest. You could set this boost slightly lower >>> than peak, and output just a little below MPP. That way the overall output >>> would be minimally reduced, and a modest amount of shading would not cause >>> the shaded module to drop below collective MPP as readily. >>> >>> Allan Sindelar >>> [email protected] >>> NABCEP Certified Photovoltaic Installer >>> NABCEP Certified Technical Sales Professional >>> New Mexico EE98J Journeyman Electrician >>> Founder and Chief Technology Officer >>> Positive Energy, Inc. >>> 3209 Richards Lane (note new address) >>> Santa Fe, New Mexico 87507 >>> 505 424-1112 >>> www.positiveenergysolar.com >>> >>> >>> >>> >>> -- >>> This message has been scanned for viruses and >>> dangerous content by Hudson Valley Computer Services, and is >>> believed to be clean. >>> _______________________________________________ >>> List sponsored by Home Power magazine >>> >>> List Address: [email protected] >>> >>> 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: [email protected] >>> >>> 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: [email protected] >> >> 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: [email protected] > > 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: [email protected] 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
