<font face="arial" size="3"><p style="margin:0;padding:0;font-family: arial; font-size: 12pt; word-wrap: break-word;">perhaps i'm just an "old school old fart", but i still think flooded, lead calcium cells are the best solution for battery back-up grid ties. i have a set from 1986, replaced when they ended their "20 year service life" from our local hydroelectric plant... still going strong. i am also finding great performance on my "beta test set" of surrette fc420's installed in june of 2008. they rarely need water or equalizing.</p>
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<p style="margin:0;padding:0;font-family: arial; font-size: 12pt; word-wrap: break-word;">reinventing the wheel might not always be necessary.</p>
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<p style="margin:0;padding:0;font-family: arial; font-size: 12pt; word-wrap: break-word;">todd</p>
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<p style="margin:0;padding:0;font-family: arial; font-size: 12pt; word-wrap: break-word;">On Wednesday, September 17, 2014 9:15am, Jarmo.Venalainen@schneider-electric.com said:<br /><br /></p>
<div id="SafeStyles1410972557"><span style="font-family: sans-serif; font-size: small;">Hi:</span> <br /><br /><span style="font-family: sans-serif; font-size: small;">I understand from your e-mail that the EV DIY industry has been successfully using a Lion pack with minimal monitoring/battery management and perhaps the packs will continue to work out. However, a relatively small number of systems do not validate the safety and reliability of a solution.</span> <br /><br /><span style="font-family: sans-serif; font-size: small;">Over the last decade or so, the biggest application of series connected Lion cells has been in laptops. From that it has been learned that battery management is needed for reliable, long life and safe operation. Indeed, to meet that need all the major semiconductor manufacturers have designed a multitude of dedicated battery management chips. Here for example are links to some of the Texas Instruments offer and its easy to find much more from any number of manufacturers.</span></div></font><br><br><br>Sent from Finest Planet WebMail.<br>