Surrette has a technical bulletin on activating a dry-charged battery available at http://www.surrette.com/?q=node/46 <http://www.surrette.com/?q=node/46>
It states: Shelf life of a dry charge battery is five years plus. Store in a cool dry area. The positive plate has an unlimited shelf life. The negative plate will revert to lead oxide when in the presence of water and oxygen. If this should happen, the battery is not ruined, but activation will take considerably longer! So, basically unlimited shelf life on dry charged batteries, keep them cool & dry, but if moisture gets into the cell activation will take a lot longer. Hope that helps. Phil Undercuffler Director, Battery-based and Off-grid Conergy Sales & Systems, Americas Our World Is Full of Energy 1730 Camino Carlos Rey Suite 103 Santa Fe, NM 87507 [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> Direct | 505.216.3841 Toll Free | 888.396.6611 x4841 Fax | 505.473.3830 www.conergy.us <http://www.conergy.us/> ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David Palumbo Sent: Tuesday, August 05, 2008 12:33 PM To: RE-wrenches Subject: Re: [RE-wrenches] Battery Question Kirpal, Ask Surrette directly on this. I recall having this done on an order of batteries being shipped to Africa about ten years ago. They had to be special ordered without electrolyte (cost more for this - an extra step for the manufacturer as it was explained to me) and also had to be dried out and sealed (as I remember) so that there would be no corrosion inside the cell. I think that the shelf life was a year or less before they needed to be filled with electrolyte. Dave Palumbo Independent Power LLC -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Kirpal Khalsa Sent: Tuesday, August 05, 2008 9:41 AM To: RE-wrenches Subject: [RE-wrenches] Battery Question Hello All......we have a customer who is interested in storing some Surrette batteries with no electrolyte as a back up set of batteries......is there any time period that you would expect these batteries to remain healthy....do they start losing life after some time? how long can you store batteries with no electrolyte and still expect them to remain in good condition when you want to begin using them? Thanks!!! -- Sunny Regards, Kirpal Khalsa NABCEP Certified Solar PV Installer Renewable Energy Systems
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