[RE-wrenches] Concorde Lifeline Battery failures

[Darryl Thayer]

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?

On Fri, Jan 19, 2018 at 10:26 PM, William Miller <william at millersolar.com>
wrote:

> Friends:
>
> 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!
>
> William Miller
>
> > On Jan 19, 2018, at 4:12 PM, Maverick Brown <maverick at mavericksolar.com>
> wrote:
> >
> > 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’s
> 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.
> >
> >
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