The main reason for re-torqueing battery fasteners is "lead creep", where the lead terminal conforms to the pressure of the fastener and slowly creeps away. This assumes the terminal is flat and so is the lug. After the terminals are "clean bright and tight" apply the Vaseline with an acid brush. Then use a blow dryer to "melt" it into all the voids of the connection. Can't hardly tell the terminals are coated...except no corrosion.
Rob From: [email protected] [mailto:[email protected]] On Behalf Of John Berdner Sent: Monday, April 01, 2013 7:22 PM To: RE-wrenches Subject: Re: [RE-wrenches] Battery Terminal Connections William: I agree completely on all points. I have also seen many bolt heads "migrate" through the battery terminals and even split the terminal. Washers are cheap and effective prevention. Just one more thing.as an afterthought. Stainless is a lousy conductor - NEVER put a stainless washers in the current path, i.e. not between the terminal and the cable ends. It might seem ok during basic testing but during a long high current charge or discharge the stainless washer will get very hot and bad things can happen. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 From: [email protected] [mailto:[email protected]] On Behalf Of William Miller Sent: Monday, April 01, 2013 2:41 PM To: [email protected]; RE-wrenches Subject: [RE-wrenches] Battery Terminal Connections Friends: In my opinion, the single most important procedure is to put a flat washer between the bolt head and the lead flag. Many, many times I have seen the bolt head sink into the flag, loosening the connection. You know it has happened because the lead moves in around the bolt threads and makes the bolt difficult to remove. I saw this twice last week, both with systems we installed, using hardware provided by the manufacturer that did not include flat washers. We now provide the flat washers and use lock washers as well. Second most important procedure: clean, shiny, metal-to-metal connections, torqued before any coating is applied. William Miller CONFIDENTIALITY NOTICE: This e-mail and its attachments are intended only for the use of the individual or entity who is the intended recipient and may contain information that is privileged, confidential and exempt from disclosure or any type of use under applicable law. If the reader of this e-mail is not the intended recipient, or the employee, agent, or representative responsible for delivering the e-mail to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this e-mail is strictly prohibited. If you have received this e-mail in error, please reply immediately to the sender. P Please think of the environment before printing this email
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