The sonnen eco series of products were available before the PW2, and are available today through distributors. They also take AC in and out, with batteries and inverter internal in a sleek enclosure. They are programmable for exporting restrictions.
-Glenn -----Original Message----- From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Darryl Thayer Sent: Thursday, October 12, 2017 12:08 PM To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Subject: Re: [RE-wrenches] lithium battereis Hello Jay and Larry. As I mentioned I have had experience with only 3 systems, I have another one coming up. The charge controller problem has occurred in all of my systems, But this is perhaps a misunderstanding on my part. I used manufactures data, trying to attain maximum life. As mentioned by others, I would not install a system without BMS built in. I am interested in powerwall-2 AC as it seems to have some advantage in no export, and the glamour of LI. I have not been able to get one, except through giving the project to a competitor. Does anyone else make a similar product? And does anyone have information on the actual product as far as pass-through and turn-down for no export systems? Thanks to both of you and others for the information. On Thu, Oct 12, 2017 at 10:40 AM, Starlight Solar Power Systems < la...@starlightsolar.com> wrote: > Hello Darryl, > > Quote "You must be careful of LI because if you are floating, the > voltage drops so little your CC will not necessarily pick-up.” > > We have sold hundreds of Li-ion batteries over the last 4 years. No > one has had a problem with a PV solar charge controller or battery > charger providing current when a load is applied. If the battery > voltage is at equilibrium with the charger, float mode and current > basically zero, the slightest load will be directed to the charge > source as it attempts to maintain voltage. > > Hey Jay, > > We sell Relion with cylindrical cells and prismatic cells from Elite > Power Solutions (GBS) and LiFeBlue Battery. We have never had a cell > failure with any battery yet so as for cell quality, all brands are > working well. The problems we have had are always with the EMS systems. > > My thoughts comparing the two battery types are one type has fewer > points of failure. In a 100AH 12 volt pack using cylindrical cells, > you have many dozens of batteries and connections compared to 4 to 16 > prismatic cells. I know Tesla cars have worked extremely well with > 7000+ cylindrical cells but he has spent millions making it work. In > the Li battery market we are involved with, I’m not so sure the > manufacturers have provided the same level of QC. > > Larry Crutcher > Starlight Solar Power Systems > > > On Oct 7, 2017, at 8:05 PM, Darryl Thayer <darylsol...@gmail.com> wrote: > > I have only limited experience with Lithium batteries. But in that > experience, a module of small cylindrical cells will have a higher > power, faster charge, and discharge. For the same chemistry, the > prism cells will have a little higher energy density. For long cycle > life and slow aging, the differences in battery additives meaning the > manufacturer are paramount. In using Li-ion there are a few tricks. > The voltage is very stable, so you can not use voltage for the state > of charge. For LA you will float 13.4 forever, then when you draw > power, the voltage drops. even at low draw, the voltage drops to the > 12.6 range. You must be careful of LI because if you are floating, > the voltage drops so little your CC will not necessarily pick-up. > Some manufacturers give you instruction via mod bus or some form of > communication. So ask your CC supplier and your battery people good luck some > do not even understand their own equipment. > > On Sat, Oct 7, 2017 at 10:16 AM, jay <jay.pe...@gmail.com> wrote: > > > To follow along with the lithium questions, > > > > I’m wondering what thoughts/information people have on prismatic vs > > cylindrical lithium family batteries? > > > > My questions are quality,cycle life, pros/cons,recycling? > > > > Thanks > > > > jay > > _______________________________________________ > 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 > > _______________________________________________ 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 _______________________________________________ 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
