<div dir="ltr">I am about to order AGMs for two backup power systems, help, they will be in float all the time (except for emergencies. I have a set of C&D pure lead that was installed in 2003 and are still serving, the Last cycle was last July for a two-day outage, What batteries do you recommend? </div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jan 19, 2018 at 10:26 PM, William Miller <span dir="ltr"><<a href="mailto:william@millersolar.com" target="_blank">william@millersolar.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Friends:<br>
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I had a similar experience with Trojan vented L-16s about two years ago: all of a sudden the product would not perform as it used to. A vendor let slip that plate chemistry had been modified. I was later told that charge voltages needed to be higher than ever recommended previously-voltages difficult to achieve off-grid. This product degradation has been discussed here. Likewise it was helpful to corroborate experiences. Thanks, everyone!<br>
<span class="HOEnZb"><font color="#888888"><br>
William Miller<br>
</font></span><span class="im HOEnZb"><br>
> On Jan 19, 2018, at 4:12 PM, Maverick Brown <<a href="mailto:maverick@mavericksolar.com">maverick@mavericksolar.com</a>> wrote:<br>
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> Same here! We use mostly SunExtender and have had the same issue. As far as I know, they are the same battery with different labels. I have had some success in being a LOT more aggressive with voltages & times and sometimes going above FLA settings to get banks to recover and perform closer to spec. Makes me nervous though, since more than 50% of a customer\u2019s investment can just vaporize with what one thought was appropriate charge settings. I suggest EQ as the new norm for AGMs, especially in grid-tied-battery-backup cases and where off-grid use does not give adequate absorb time.<br>
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