no batteries on grid tie [RE-wrenches]

[Daryl Thayer]

Thanks Matt
My interest in sealed is low hydrogen production for
indoor battery mounting, and low maintenance.  

I have been told that the battery size does matter and
another system I have designed used a 400 AH at 48
volts from Xantrex information.  They told me I needed
to be that large because of the pulsed nature of the
current drawn by the SW.  
 
Daryl 


--- Matt Tritt <solarone at charter.net> wrote:
> Daryl,
> 
> If your customer intends to be connected to the
> grid, you have to use
> equipment that's been approved for the job, which
> eliminates
> experimentation with capacitors and other home brew
> recipes. In essence,
> a battery is a capacitor when used the way you plan.
> 
> A Xantrex SW with a small battery, say 100 AH or so,
> should do just
> fine. Plus they will have a little bit of reserve
> power for outages if
> you also install a transfer switch in the mix. Are
> you interested in
> sealed batteries because of the maintenance factor?
> 
> Matt T
> 
> -----Original Message-----
> From: Daryl Thayer [mailto:daryl_solar at yahoo.com] 
> Sent: Thursday, August 07, 2003 5:56 AM
> To: RE-wrenches at topica.com
> Subject: RE: no batteries on grid tie [RE-wrenches]
> 
> hello to all again
> 
> Hello to all
> I have a customer who wants a Bergey 1kW and grid
> tie.
>  I have mostly done stand-alone and grid-tie with
> UPS
> on a 24 or 48 volt battery set.  This Customer does
> not want batteries.  
> 
> Can I use large capacitors?  Has anyone tried this? 
> How large would the capacitors have to be?  Can I
> use
> a FX series or other inverter?   It would seem the
> faster the chop frequency of the inverter the
> smaller
> the capacitors.  I think the SW uses a slower chop
> than the FX ? so the FX would work better? 
> 
> If I am forced to use a battery, sealed AGM how
> small
> could it be?  (I am concerned here myself because
> the
> wind generator charge controller is not like an MX
> 60
> with precise control.)  
> 
> Thanks again for all the help on my past questions. 
>  
> 
> Daryl
> daryl_solar at yahoo.com
> 
> 
> 
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