no batteries on grid tie [RE-wrenches]
Matt Tritt
solarone at charter.net
Thu Aug 7 21:23:10 PDT 2003
Hi Daryl,
I'd head that some time ago but (wrongly) assumed it was a solar folk
tale. I wonder if you could use a smaller battery with the Outback???
Hydro caps, for all their high cost/short life do a good job of re
combining H and saving the contents of batteries. I personally prefer
good old fashioned lead acid wet cells for longevity, resilience and
price. Sealed cells seem to just crap out with little or no warning.
Matt T
-----Original Message-----
From: Daryl Thayer [mailto:daryl_solar at yahoo.com]
Sent: Thursday, August 07, 2003 10:13 AM
To: RE-wrenches at topica.com
Subject: RE: no batteries on grid tie [RE-wrenches]
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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