Hi Darryl, When looking at off-grid systems, in your opinion, how often is there excess current, i.e. more amps from the PV / Charge Source than can be absorbed & approximately what percentage of capacity?
Looking at Lithium Ion, like NMC, you can recharge at 2x Capacity (so 1/2 hour recharge times) however, for off-grid, what do you do with all the excess charging capacity once the bank is full? LA have decent acceptance until they approach fully charged (20%) and lead calcium (AGM, Gel or Flooded Calcium) maintain a higher acceptance rate for longer. There's always a downside (lower cycle life, higher cost, etc) but Flooded Calcium may have a place in the off-grid space. Regards, Jamie >>> Darryl Thayer <daryl_so...@yahoo.com> 8/24/2011 11:44 AM >>> One of the advantages of LiFeP is the fast rechange rate. I have found that fast recharge is very hard on LA batteries, if they are recharged faster they fail sooner. Perhaps Jamie or others could answer is there something that can be recharged fast? Capasitors are almost impossible to work with. Lead carbon? Ni Magnisum Cobalt? From: Jeff Oldham <starpowe...@juno.com> To: re-wrenches@lists.re-wrenches.org Sent: Tuesday, August 23, 2011 5:31 PM Subject: Re: [RE-wrenches] Lithium Ion Phosphate for grid back up I 2nd what Ray Waters is saying. Much too soon, BMS will be an insane challenge, we rarely care about weight and footprint like the EV's do. Returning defective cells to China IF they accept responsibility for the failure - I don't think so!! Sex appeal is overwhelming good judgement, one of the curses of our industry. >From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative >SOLutions ____________________________________________________________ Penny Stock Jumping 3000% ( http://thirdpartyoffers.juno.com/TGL3132/4e542a7bb4c77837e37st04vuc ) Sign up to the #1 voted penny stock newsletter for free today! ( http://thirdpartyoffers.juno.com/TGL3132/4e542a7bb4c77837e37st04vuc )AwesomePennyStocks.com ( http://thirdpartyoffers.juno.com/TGL3132/4e542a7bb4c77837e37st04vuc ) _______________________________________________ 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 This message contained an attachment [] that can be retrieved by visiting https://surrette.messagescreen.com/quarantine/GetAttachment?CID=81&OID=2bc0e1a9474f4515a6e7f5368c043a781. Your attachment has been This email and its attachments have been scanned by iConnection E-Mail Firewall for viruses, spam, and malicious content. The information transmitted in this email is intended only for the entity or person to which it is addressed and may contain confidential/privileged material. If you received this in error, please contact the sender and delete the material from any computer. Any review, retransmission, dissemination, or other use of this information by persons or entities other than the intended recipient is strictly prohibited. %^^%
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