Solar Boost in Net Metering [RE-wrenches]

[Jeffrey Wolfe, Global Resources]

Jon,

Both the Solar Boost that we use on our mobile setup and the Fire Wind and 
Rain that we are destroying in our basement are hooked up to net meter. The 
only tricky part is just like on the C-40's or others. Make sure the 
controller does not go into shutoff due to voltage. I was told by Trace to 
keep the voltage differential (between the Inverter and the charge 
controller) at .5V for 12V system, 1V for a 24V system and 1.5V for a 48 V 
system, due to "measurement errors" (i.e. to make up for Trace's bad 
meters).

The power boost and the voltage conversion have nothing to do with the net 
metering otherwise. Of course, we do not see the larger boost, since we are 
operating at "battery full" levels, but we are still seeing an 
(unscientifically measured) approximately 10 - 15% boost with the SB50. (No 
boost, probably deficiet, with the FWR)

Jeff

Jeffery D. Wolfe, P.E.
Global Resource Options, LLP
A Woman-Owned Vermont Limited Liability Partnership
4 Kibling Hill Road
P.O. Box 51
Strafford, VT 05072
802/765-4632
802/765-9983 (Fax)
global at sover.net
www.globalresourceoptions.com


----------
From: 	Jonathan Hill[SMTP:solarjon at netshel.net]
Reply To: 	RE-wrenches at topica.com
Sent: 	Tuesday, August 15, 2000 6:33 PM
To: 	RE-wrenches at topica.com
Subject: 	Re: MIXED PANEL ARRAY'S [RE-wrenches]

Does anyone have any experience using the Solar Boost 50 with a net
metering system?
Jon Hill

>Steve
>
>I'm not sure what you are saying.  Is this something you have seen as I
>don't think it would matter how large the array other than the the Solar
>Boost 50 itself would represent a larger draw on a smaller array.  The 
main
>reason I am considering going to 24 volts is to leave as much room in the
>future for expansion. They are talking about wanting to be able to charge 
to
>Campground host's RV batteries as well.  Also, to meet code you can never
>parallel modules so I have to pull wires for all 6 modules to the combiner
>box.  I just as soon pull 3 runs instead of 6 runs.
>
>As I understand MPPT there is not much potential for boosting during warm
>weather and as batteries get fully charged.  The colder the weather the
>higher the panels voltage gets this the more potential for boost.  It 
makes
>sense that the UniSolar amorphous products don't have much application for
>MPPT as their MPP is pretty low to begin with.
>
>Thanks
>Travis Creswell
>----------
>  >From: "Steve Willey, Backwoods Solar" <steve at backwoodssolar.com>
>  >To: RE-wrenches at topica.com
>  >Subject: Re: MIXED PANEL ARRAY'S [RE-wrenches]
>  >Date: Mon, Aug 14, 2000, 2:57 PM
>  >
>
>  >Another consideration is that the boost 50 doing the conversion does
>  >not boost or even double when module power is down at 3 or 4 amp level 
as in
>  >morning or evening or with a smaller array
>
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 RE-wrenches at topica.com

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 http://www.topica.com/lists/RE-wrenches/

To unsubscribe send a message to: 
 RE-wrenches-unsubscribe at topica.com

To check out the other RE-Wrench participants:
 www.mrsharkey.com/wrenches/index.html

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For info contact list moderator by email:
 michael.welch at homepower.com
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