c-40 battery charging [RE-wrenches]

[Darryl Thayer]

Thanks Roy and others,
However, I am not concerned with overloading the C-40,
in one case I am worried about losing charge
potential.  If I have two separate arrays two separate
C-40s, one on each array, connected to the battery. 
And one of the C-40 starts charging the battery bank
raising the bank voltage, the second C-40 would only
stay in float.  Thereby losing its charge potential.  

Again if one array charges the battery rasing the
voltage, would this not keep the second array and its
C-40 from making any contribution? 

Daryl 

--- Roy Dyngen <roy.dyngen at xantrex.com> wrote:
> Whether the unit is in bulk or float, the C40 does
> not current limit.  In a
> nutshell, the battery side of the C40 can be
> configured in parallell, the
> array/load side cannot.
> 
> Roy Dyngen
> Xantrex Technology Inc.
> 
> -----Original Message-----
> From: Darryl Thayer [mailto:daryl_solar at yahoo.com] 
> Sent: Thursday, October 09, 2003 9:51 AM
> To: RE-wrenches at topica.com
> Subject: RE: c-40 battery charging [RE-wrenches]
> 
> Can the C40 be paralleled on the load side? how
> about
> the idea that one C40 will raise the battery voltage
> by charging and the second will think the voltage is
> to high and NOT go into bulk charge, and stay in
> float, thereby essentially shutting off on array?  
> 
> --- Roy Dyngen <roy.dyngen at xantrex.com> wrote:
> > I wouldn't parallel them on the load side in
> > diversion control for the same
> > reason as charge control.  You can parallel on the
> > battery side in any
> > configuration.
> > 
> > Roy Dyngen
> > Xantrex Technology Inc.
> > 
> > -----Original Message-----
> > From: sunwise [mailto:sunwise at cheqnet.net] 
> > Sent: Wednesday, October 08, 2003 2:40 PM
> > To: RE-wrenches at topica.com
> > Subject: RE: c-40 battery charging [RE-wrenches]
> > 
> > I believe you could parallel two C40s if they were
> > used as diversion
> > regulators.  Interesting to note, they still
> operate
> > as a three stage
> > charge control when used as diversion regulators. 
> 
> > 
> > If it wasn't for the fact that I like MPPT charge
> > controllers so much,
> > this is what I'd be using on almost all PV
> systems. 
> > Instead of wasting
> > extra energy during the sunny summer months, you
> can
> > dump it into a hot
> > water tank.
> > 
> > Kurt Nelson
> > 
> >  
> > 
> > -----Original Message-----
> > From: Roy Dyngen [mailto:roy.dyngen at xantrex.com] 
> > Sent: Wednesday, October 08, 2003 3:54 PM
> > To: RE-wrenches at topica.com
> > Subject: RE: c-40 battery charging [RE-wrenches]
> > 
> > Hi Daryl,
> > 
> > You cannot parallel two C40's on the array side. 
> > Once one of the units
> > starts to regulate, the other will see the total
> > array current and
> > become
> > overloaded or over-temped. Once it shuts down, the
> > same thing would
> > happen
> > to the first unit. You must separate the arrays.
> > 
> > Roy Dyngen,
> > Xantrex Technology Inc.
> > 
> > -----Original Message-----
> > From: Darryl Thayer [mailto:daryl_solar at yahoo.com]
> 
> > Sent: Tuesday, October 07, 2003 11:20 AM
> > To: re Wrenches
> > Subject: c-40 battery charging [RE-wrenches]
> > 
> > Hello to all
> > Can I connect two c-40 charge controllers to one
> PV
> > array?  Such that each charges a battery string
> > separately?  
> > 
> > The reason for the question is to separate two
> > battery
> > strings to prevent thermal runaway.  
> > 
> > Daryl
> 
> 
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