HUP VS Rolls [RE-wrenches]

Ray Walters walters at taosnet.com
Tue Mar 13 18:33:08 PDT 2007


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These batteries have been deep cycled like all my other systems. I  
sell lots of T105s, and they never act like that, even with lots of  
deep cycling abuse and partial charging. One set of Rolls has been  
floated for most of its 1 year in service, so it has no excuse.  
Charge settings according to Rolls literature is the same or close to  
other batteries. There are other good batteries, and some great  
batteries, but I'm not able to put the Rolls in either of those  
categories right now.

Ray


On Mar 13, 2007, at 4:49 PM, John Raynes wrote:

>
> Ray,
>
> I've been told at various times that the characteristics you're  
> describing are the sign of a highly sulfated battery.  That is, the  
> sulfation causes a higher source impedance such as you're seeing.   
> Did any of the sets see long term intervals of time where they  
> weren't able to reach full charge?  Are you considering using one  
> of the anti-sulfation pulsing tools on any of the battery banks?   
> Maybe they're more prone to sulfation degradation than other types.
>
> I'm curious to hear all that I can on the Surrettes.  We're looking  
> at switching to them in a major way this season due to both pricing  
> and sourcing issues with Trojan in our region.  But the kind of  
> issues that you and Alan have brought up aren't making this the  
> slam dunk I had hoped...
>
> John Raynes
> RE Solar
> Torrey, UT
>
>
>
> At 04:21 PM 3/12/2007 -0600, you wrote:
>
>> Good News on the HUP, as the Rolls 5000s we installed about 1 to 2
>> years ago are having very disquieting performance. 3 different sets I
>> have tested all behave as if they are close to "death". They quickly
>> run to below nominal voltage when loaded, and then when charged at a
>> c10 to c20 rate, they go to equalize voltages within 5 minutes. If I
>> had just been called out on an old system and saw numbers like that,
>> I would be shaking my head and recommending a new set of
>> batteries.... only I just sold these people new batteries, and talked
>> them into the "better", more expensive Rolls. The Rolls were easier
>> to install than the HUPs, but the HUPS, Bulldogs, Exide Industrial,
>> etc. that I have installed have been very stable, with no problems
>> what so ever. Some have been in for almost 10 years.
>> Rolls seem to be a completely different battery, they don't like to
>> be discharged hard at all. I'm cringing on providing the extended
>> warranty I promised too. At least they're easier to move.....I hope I
>> don't have to.
>>
>> Ray
>
>
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