HUP VS Rolls [RE-wrenches]

Mon Mar 19 19:47:22 PDT 2007

Hi to all
Rolls batteries working for me.  

I do not have the long term experiance of you three,
but I do have some customers with standalone with
Rolls batteries, the oldest two are just about 7+
years.   Both are still doing well.  Both I might add
felt a loss of capacity early on, and I discovered
that the cells were not getting fully recharged. (by
hydrometer)  In both cases I told the customers to do
a monthly check and recharge, ususally using their
generator. (as Ezra said silicone to lead ratio).  

Also it seems to take a long time to recharge. 
Perhaps the Rolls batteries have a different charge
voltage and time than other batteries.  Perhaps not.  

I like all of you wish that both the solar sources and
charge controllers and batteries were easier to
understand and more forgiving in there application.  

I have almost 9 years on my truck battery, but it is
never deep cycled, never left discharged, and gets a
14.4 absorbtion charge at least twice every day.  But
it is a cheap battery and so far still starts my
truck.  

The story is in solar applications the applications
are the same only in being solar nothing else is the
same.  

Darryl

--- "Ezra Auerbach, DragonSun Consulting"
<ezra at lasqueti.net> wrote:

> 
> 
> Hello all,
> 
> When I did some work for Apollo Solar
> (www.apollo-solar.net) I  
> produced a table of charging voltages for MPPT
> charge controller. I  
> contacted Surrette/Rolls and the values below
> reflect the mid point  
> between their minimum and maximum values. Many
> thanks to John Pfeifer  
> at Apollo Solar for allowing me to use his table. I
> personally run my  
> batteries a bit harder than these values but I am
> married to a  
> wonderful woman who looks after watering them. I
> equalize regularly,  
> especially during the winter months when I run them
> up to 31.5 on the  
> EQ cycle.
> 
> 
>   	Voltages Per 2 Volt Cell	Temp Comp	12 Volt	24
> Volt	48 Volt
>   	Absorb	Float	Equalize	mV/deg C	Absorb	Float
> Equalize	Absorb	Float	 
> Equalize	Absorb	Float	Equalize
> Surrette (Flooded)	2.40	2.21	2.58	-5.00	14.40	13.26
> 15.48	28.80	26.52	 
> 30.96	57.60	53.04	61.92
> 
> I'm happy with the results of running my batteries
> at these charging  
> voltages, it worked wonders on my old Yuasa's they
> lasted for over 13  
> years. I've been off grid for over 35 years and, not
> surprisingly,  
> through more than a few sets of batteries. What I've
> learned can  
> almost be summed up in a single sentence. "Charge
> them aggressively,  
> get the electrolyte warm, and don't be afraid to put
> water in them."
> 
> Regards,
> 
> Ezra
> 
> 
> Ezra Auerbach
> DragonSun Consulting
> Lasqueti Island, B.C. V0R 2J0
> 
> ezra at lincsat.com
> 250 333 8650
> 
> 
> 
> On 18-Mar-07, at 8:50 AM, Chris Worcester wrote:
> 
> >
> > Hi Roy,
> > That's 16 years or 5840 cycles on the IBE's. This
> is year 30 for me  
> > being
> > off the corporate grid.
> > What to do about all those Surrette's out there
> now? I like to  
> > bring up the
> > PV charge controller's bulk charging to around
> 28.8 to 29 daily on  
> > the 24V
> > systems (57.6 to 58.0V on the 48V curve). This
> really works on the  
> > old IBE's
> > and I'm wondering if others are using this sort of
> value on the  
> > Rolls with
> > good results? Should this go up to 29.2V at 24
> nominal (58.4 at 48V)?
> > I don't want to work the batteries too hard on a
> daily basis but if  
> > this is
> > what it takes for longevity let's do it.
> >
> > 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: Roy Butler, Four Winds RE
> [mailto:roy at four-winds-energy.com]
> > Sent: Saturday, March 17, 2007 3:22 PM
> > To: RE-wrenches at topica.com
> > Subject: Re: HUP VS Rolls [RE-wrenches]
> >
> >
> > Chris,
> >
> > You have me beat.....only 10 years off-grid for
> me....just a newbie!
> >
> > I have the Surrette CH-375's in my system...fore
> runner to the S-460.
> > They're on their last legs now (lots of abuse...a
> case of age and  
> > do as
> > I say, not as I do).
> > I have installed over 400 Surrette Ch-375 and
> S-460s in about 42  
> > systems
> > since 1998.
> > And since 2002 about 60 of the 4KS-25PS and about
> 40 of the 4KS-21PS.
> >
> > We found that they all needed aggressive charging
> to prevent  
> > sulfation.
> > We almost lost a bank of 36 of the 4KS-25PS
> batteries....until we  
> > found
> > that a 10 hour corrective equalization at 62 volts
> 2-3 times per year
> > was needed.
> >
> > FYI...I have 2 banks of the S530 batteries out
> there....they are the
> > worst to keep healthy.
> > I won't have anything to do with them anymore.
> >
> > I find that Trojan and Deka are a lot more
> forgiving and don't seem to
> > have the need for all that extra generator or grid
> usage to keep 'em
> > healthy. I'm sure there are others just as good,
> but those are the
> > brands I'm most familiar with.
> >
> > I stuck with Surrette as long as I could afford
> to....probably too  
> > long.
> > I'm ready for a change and have been following
> this HUP discussion  
> > very
> > closely. Thanks to everyone for all the great
> feedback!
> >
> > Roy Butler
> > NABCEP Certified Solar PV InstallerR
> > NYSERDA eligible PV & wind installer
> > Four Winds Renewable Energy, LLC
> > 8902 Route 46
> > Arkport, NY 14807
> > 607-324-9747
> > www.four-winds-energy.com
> >
> > Although no trees were killed in the sending of
> this message,
> > a large number of electrons were terribly
> inconvenienced.
> >
> >
> >
> >
> > Chris Worcester wrote:
> >
> >> 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
> 
=== message truncated ===

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