[RE-wrenches] Trackers
Dana
dana at solarwork.com
Thu Sep 6 11:18:29 EDT 2018
I second this observation.
I now live again off grid in a narrow N-S canyon in south central Idaho. Having limited ground space [thanks to county regs] & not wanting roof mounted arrays to have to clear snow from, trackers VS. fix top of pole mounts enhance my output & they reduced the # of modules required for my homes projected load design.
* 6400 watts rated output on 2 Array Tech tracking arrays. Fixed would have required 3 arrays & 6-8 more modules. Trackers are programed to full vertical in winter to shed overnight snow dumps, this saves time & effort in the morning when it’s a Powder day! Can’t miss those Powder mornings.
* 5400 watts per hour in the summer when hot.
* Up to 8400 watts per hour on a cold winter day. Exactly what I needed 31+% additional output with a 4-hour window of sun at New Year’s Day. So far, my generator has never started…
*A repeat from a previous RE conversation years ago, I had to see for myself &:
Last house in CO, I had [6] 250-watt mod on a tracker & [6] 250-watt mod on a fixed roof array.
The tracker consistently outproduced the fixed array by 32% averaged over the year.
Trackers have their place and advantages. That said, with todays $/watt o modules if you have the space fixed is a more cost-effective way to proceed.
Signed - A 25-year tracker advocate.
----------------------------------------------------------------------------
Dana Orzel Great Solar Works, Inc.
C - 208.721.7003 dana at solarwork.com
Idaho Contractor - # 028765 Idaho PV # 028374
NABCEP # 051112-136 <http://www.solarwork.biz> www.solarwork.biz
"Responsible Technologies for Responsible People since 1988"
P Please consider the environment before printing this email.
From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf Of Chris Schaefer
Sent: Thursday, September 06, 2018 8:27 AM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] Trackers
To All,
Seen it first hand with existing Northeast offgrid clients that had old pole mounts with lots of generator usage during the winter months. Added a single 12 module DAT and generator usage was down to as little as twice in the entire winter. Others usage was down to just a handful of times required from genny. They are great at shedding snow. Bottom line is generator usage was cut in most cases by 75% or better. I'm a believer here in upstate NY.
Christopher
Chris Schaefer’s
<http://www.solarandwindfx.com/>
Tel/Fax 585-229-2083 or Cell 585-748-1870
5115 South Hill Road ~ Canandaigua New York 14424
www.solarandwindfx.com <http://www.solarandwindfx.com/> ~ E-mail: <mailto:chris at solarandwindfx.com> chris at solarandwindfx.com
<http://solarandwindfx.com/wp-content/uploads/2015/01/certs.jpg>
Thomas Jefferson, the author of our great Constitution, once said, "democracy" will cease to exist when you take away from those who are willing to work and give to those who would not."
On Thu, Sep 6, 2018 at 12:37 AM, Andrew Truitt <atruitt at gmail.com <mailto:atruitt at gmail.com> > wrote:
These guys are new but I've heard good things: http://www.sulasindustries.com/
Regards,
Andrew Truitt | <http://dr.ventures/> DRV
www.dr.ventures
d: 202.486.7507
NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132
"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion to fission. And it just so happens that there's an enormous fusion reactor safely banked a few million miles from us. It delivers more than we could ever use in just about 8 minutes. And it's wireless!"
~William McDonough
On Wed, Sep 5, 2018 at 9:38 PM Sindelar Solar <Allan at sindelarsolar.com <mailto:Allan at sindelarsolar.com> > wrote:
Bill,
No, I'm with you on this.Given the the greatest boost (~+/- 30%) of daily tracking is during the summer and most stand-alone applications are winter-peak (where tracking adds at best 10-15%), seasonal water pumping is about the only time when small-scale tracking is justified over simply adding array. Any pumping where the source is slow enough that the length of the day becomes an important factor, like drip irrigation or a very low yield well or spring, is worth looking into. But that's about it in my experience.
Allan
--
Allan Sindelar
allan at sindelarsolar.com <mailto:allan at sindelarsolar.com>
NABCEP Certified PV Installation Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
505 780-2738 cell
On 9/5/2018 5:53 PM, solar1online at charter.net <mailto:solar1online at charter.net> wrote:
Chris,
I thought since solar PV prices have come down (understatement), is it not more cost effective to buy more modules than a tracker? Are there scenarios that the above would not ring true? (As I remember, off grid water pumping for livestock ponds may still be an exception as also, limited space.) Please advise.
Thanks,
Bill Loesch
Solar 1 - Saint Louis Solar
314 631 1094
----------------------------------------
From: chris at OasisMontana.com <mailto:chris at OasisMontana.com>
Sent: Wednesday September 5 2018 3:45:25PM
Dear people:
What trackers are y’all using nowadays? I have a customer (with a great site) who’s insisting on a pair. We’ve sold Zomeworks and Array Technologies in the past, but I know there are more offerings now.
Thanks for the input!
Chris Daum
Oasis Montana Inc.
406-777-4309 or 4321
406-777-4309 fax
<http://www.oasismontana.com> www.oasismontana.com
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Chris Schaefer’s
<http://www.solarandwindfx.com>
Tel/Fax 585-229-2083 or Cell 585-748-1870
5115 South Hill Road ~ Canandaigua New York 14424
www.solarandwindfx.com <http://www.solarandwindfx.com> ~ E-mail: chris at solarandwindfx.com <mailto:chris at solarandwindfx.com>
<http://solarandwindfx.com/wp-content/uploads/2015/01/certs.jpg>
Thomas Jefferson, the author of our great Constitution, once said, "democracy" will cease to exist when you take away from those who are willing to work and give to those who would not."
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