Bill, Not to be another Echo here but... Yes, make sure you thaw them completely before charging.... There is significant risk of explosion when attempting charging frozen batteries. When under charge, or load I would be wearing full protective gear... Full Face Mask, Rubber Apron, Elbow length Gloves, Flush Kit... etc...
Also, I would start off very slowly... for the first ½ dozen cycles use 2.25 to 2.3 volts per cells while monitoring temperature of all the cells. If you see the temp of one or more cell rising very fast in comparison to the other, disconnect the charge and move the batteries on to the scrap yard... If cell temps stay within 3-5 degrees of each other you're probably fine and they may recover. Steve Higgins Technical Services Manager P: +1.902.597.4020 M: +1.206.790.5840 F: +1.902.597.8447 Surrette Battery Company Exclusive manufacturer of [cid:rolls249168]<http://www.rollsbattery.com> From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Feather River Solar Electric Sent: Thursday, December 03, 2015 6:00 AM To: RE-wrenches Subject: [RE-wrenches] Frozen T-105s Hey Folks, I came across an off-gridder yesterday whom was getting zero support from the dealer he had purchased his small system from, self installed, batteries in a lightly insulated box outside. When I inspected the electrolyte levels I discovered it was frozen in some cells, the voltage of the 48 volt pack was ~8 volts, I didn't check individual batteries due to these facts...I'd seen "enough". Recently temps have been in the high teens, though we are back up to low 30's. He does not have a genny or battery charger! I have a DC genny which I could use to charge these batteries but should I waste my time and his money trying to save them? Others' experience with this situation? TIA, Bill [cid:image001.jpg@01D12DAD.0BB1D150] -- Feather River Solar Electric Bill Battagin, Owner 4291 Nelson St. Taylorsville, CA 95983 530.284.7849 CA Lic 874049 www.frenergy.net<http://www.frenergy.net> This email and its attachments have been scanned by mailWatch 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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