[RE-wrenches] FLA question

[Ray]

As far as 2v L16s go, I've not seen good things with the Trojan L16 2 v 
cells.  The Rolls version looks like it is one cell though, not 3 cells 
paralleled internally like the infamous Trojan.  The voltages sound a 
bit low, can they give you SG readings? How come they haven't put those 
on a maintenance charge at the warehouse?   I've dealt with batteries 
that have sat uncharged for quite a while, and not had any issues, but 
definitely didn't get outstanding life either.  I'd pass the discount to 
the customer and let them decide.  I'd also offer another battery choice 
too.  The HUP for instance is going to have a better price per cycle in 
the long run, since it has 2100 cycles to 80% DOD vs 1200 for the 
Rolls.  With the sitting, I'd figure more like 1000 cycles actual 
maybe.  So the cost of the Rolls would need to be less than half what an 
equivalent HUP is.

Also beware, many customers get fooled by Rolls' amp hour specs. They 
list 100 hr discharge rates, so the Rolls can look amazing on paper.  
However, the customer really needs to be designing and comparing at the 
20 hr rate.  I've made that same mistake, and was quite disappointed.

Ray Walters
Remote Solar
303 505-8760

On 6/11/20 2:05 AM, Sindelar Solar wrote:
>
> Wrenches,
>
> Here's one I haven't encountered before, and I'm interested in the 
> range of opinions I may receive.
>
> My battery supplier screwed up, and they admit it. On April 27 I 
> ordered a 24V set of 2V Surrette L16 FLAs for a long time client; note 
> that these were the client's choice after his extensive research. The 
> lead time was estimated at 10-12 weeks. Today I got the news that the 
> distribution center in Reno had not placed the order, as collective 
> orders for Rolls batteries were so slow during Covid that they hadn't 
> wanted to ship just one set.
>
> I was told that they had a set in the Reno warehouse that they could 
> bring to Albuquerque that had a manufacture date of 6/26/2019. I was 
> told that at rest the 12 cells showed an average resting voltage of 
> 2.14 vpc, with the highest at 2.18V and the lowest at 2.08V.
>
> I was offered them at a discount of ~18% off of my dealer cost.
>
> Should I have any hesitation about accepting and installing a set that 
> has sat at rest for nearly a year? The alternative is to start over 
> with the 10-12 week lead time, unless we can arrange a rush delivery.
>
> Opinions welcome here, please.
>
> Allan
>
> -- 
> *Allan Sindelar*
> allan at sindelarsolar.com <mailto:allan at sindelarsolar.com>
> NABCEP Certified PV Installation Professional (charter certificant) 
> #102503-52
> New Mexico EE98J Journeyman Electrician
> Founder (Retired), Positive Energy, Inc.
> *505 780-2738 cell*
>
>
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