<div dir="ltr"><div>Kris<br></div><div>the internal plates are soldered together and can fail open and have been know to make a spark as they make contact again, you can see this in the aftermath by looking where all the plates contact the bridge inside the battery, when adding the water resulting in the cooling of the battery likely triggered the event.</div><div>Jerry<br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jul 20, 2018 at 2:30 AM, Kristopher Schmid <span dir="ltr"><<a href="mailto:solman@legacysolar.com" target="_blank">solman@legacysolar.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><span style="font-family:sans-serif;font-size:12.8px">Since we are talking batteries... I had a scheduled checkup on an inherited stand alone system last Tuesday. On Monday night, the client called to tell me that a battery blew up in his face when he was adding water (no doubt to prevent being scolded by me regarding fluid level maintenance). He assures me that there was no metal in the vicinity and, indeed, I saw no evidence of a short on the terminals. Judging by the rest of the pack, it's likely that the plates were exposed and he was adding fluid with hard solar charging in progress. Fortunately he only suffered an injured finger and a ringing in his ears.</span><div dir="auto" style="font-family:sans-serif;font-size:12.8px"><br></div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">Best guesses at the cause of the explosion?</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px"><br></div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">Picture attached.</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px"><br></div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">Thanks,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">Kris</div></div>
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