Voltage drop musings [RE-wrenches]

[Travis Creswell, Ozark Solar]

Hi William,

I didn't catch the NON non-battery grid tie.  I only saw "battery" and I
just usually think of them  as "batteryless" so my mind dropped into off
grid only mode.  Too many words for my small mind.  I assumed you were
talking about  SolarBoost 3048 and batteries.

I'm not too familiar with the ST.  I still would have figured that the MPPT
was different device in the same box with the inverter though.  I have a few
quotes out there with ST's.  Maybe I'll get to put one in soon.  Hope its a
MK. 2. for those of your familiar with military part numbers.

The deep Ozarks is very beautiful and rugged country and I don't get out to
it near enough.  I live on the edge of town.

Travis




----- Original Message -----
From: "William Miller" <wrmiller at slonet.org>
To: <RE-wrenches at topica.com>
use something over 60 volts for my voltage drop calc.
> >
> Travis:
>
> The Trace ST series inverters are designed for non-battery grid tie.  They
> take a direct connection from the PV arrays without a charge controller.
> They have built in MPPT circuitry.  I understand the MPPT voltage can vary
> because the ST recalculates the power point once a minute.  If the sun
goes
> behind a cloud, the MPPT may well be different.
>
> It sounds like you work in some beautiful country.  I'd love to ride along
> on some job.  I'm fortunate to get out in the boonies regularly, but the
> country side here is more wide open, prone to rolling grazing land.  We do
> have some dense sycamore bottom land though.  Also, we have beautiful oak
> studded hillsides.  The wildflowers are intense right now.
>
> The spreadsheets on sun angles are simple ones I wrote based on an article
> in HP about sun angles.  I could share them with you, if you would like.
I
> run them on the Palm with the use of "Documents to go" which allows one to
> use spreadsheets and word processor documents.
>
> Thanks for thinking about this.
>
> William
>


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