HUP VS Rolls [RE-wrenches]

[Chris Worcester]

Hi Gang,
Does anybody have anything good to say about the Rolls batteries anymore? We
have installed them in at least a dozen systems; they are all working,
although some of the clients have complained about a lack of storage
capacity/performance. We haven't seen any failures yet. We use the S-530's
in the small systems and mostly the 2-KS-33's in our large off grid systems.
I really like my IBE 2 volt 1476 Ah batteries that I installed here in 1991,
16 years ago, that's 5840 days off the grid. 

Sincerely,

Chris Worcester 
NABCEP Certified PV Installer TM 
USA Distributor of Proven Wind Turbines
Toll Free: 877-682-4503
Fax: 530-582-4603
www.solarwindworks.com
chris at solarwindworks.com
"Proven Energy Solutions"

-----Original Message-----
From: Jeff Yago [mailto:jryago at netscape.com] 
Sent: Saturday, March 17, 2007 6:49 AM
To: RE-wrenches at topica.com
Subject: Re: HUP VS Rolls [RE-wrenches]


We had an off-grid client with 16 Decca L-16 batteries and a 8.5 kW
generator, with a fairly large solar array.  This small generator still did
not have any problems charging the batteries when there was a week of no
sun.  However, the client felt after 6 years he wanted to change out the
batteries even though we felt they still had lots of life.  He took very
good care of the battery bank they never dropped below a 65 to 70% still
charged level.

We switched out to same size battery by Rolls and everything went to crap.
Same generator, same array, same loads, same inverter settings, but we could
NEVER get the new batteries fully charged with the generator no matter what.
We also started to get generator errors due to charging demand was much
higher than for the old batteries.  We finally had to switch out the
generator to a larger size unit but he still could never again get his
battery bank to read fully charged like it did with the older batteries.

These may be rugged batteries and they may last many years longer than other
brands, I do not know, but I will not buy any more unless maybe for a grid
tie system with lots of AC power.  They are not for off-grid applications.

Jeff Yago
Dunimis Technology Inc.

_____________________________________________________________
Netscape.  Just the Net You Need.


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