no batteries on grid tie [RE-wrenches]

[Matt Tritt]

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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