I have 2 Array Tech trackers at my house in a narrow N-S canyon. >From comparisons I have done with a fixed tilt VS Wattsun arrays I determined >repeatedly that a 32% yearly average gain was achieved, esp. in winter months. >[6 – 250 watt modules on each]
That said – with today’s cost of modules, more modules are less expensive if you have the footprint to set them. I did not have the room for ground or roof mount or for 3 poles and 2 pole mounted trackers fit the bill. Another issue that the trackers resolved, was our county has reflection ordinances & the trackers alleviated this issue! Single axis VS dual axis? I have dual axis trackers and to be able to park the tracker at the end of the day in full vertical mode reduces the snow pile up overnight in the winter. In the summer when we get a lot of wind gusts at night being able to park the tracker at night in flat [tabletop] mode is desirable. Location, location, location; Trackers work in snow country probably better than non-snow country due to their additional benefits. I have installed the large Wattsun trackers as locked in single axis to reduce the potential damage from wind on some sites. The new Wattsun controllers initially were not the easiest item to program but they have worked flawlessly, I give them 2 thumbs up. Dana Orzel Great Solar Works, Inc. C - 208.721.7003 [email protected] Idaho Contractor - # 028765 Idaho PV # 028374 NABCEP # 051112-136 <http://www.solarwork.com> www.solarwork.com "Responsible Technologies for Responsible People since 1988" P Please consider the environment before printing this email. From: RE-wrenches <[email protected]> On Behalf Of Dave Angelini Offgrid Solar Sent: Monday, December 02, 2019 9:41 AM To: RE-wrenches <[email protected]> Subject: Re: [RE-wrenches] non-sensor based tracker controller Mac, which mode is being confused elevation or azimuth. What have you replaced and what does Jeff Grulic say of Wattsun? The photo sensor I like is the single axis. There really is little need to use the dual axis for offgrid, in my opinion. Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ e-mail [email protected] <mailto:[email protected]> text 209 813 0060 On Mon, 2 Dec 2019 07:28:29 -0700, Mac Lewis <[email protected] <mailto:[email protected]> > wrote: Hi Wrenches, Does anyone know of a non-sensor based tracker controller that can work with a variety of tracker motors? We don't do trackers much but we have a WattSun DuraTrak controller that has never worked well, we've tried all sorts of tweaks. Its a tougher location that a lot because there are high snowy peaks that confuse the tracker I guess. It seems like something would be out there that would just use the sun position equation instead of sensors that can be confused. Thanks for your input -- Mac Lewis "Yo solo sé que no sé nada." -Sócrates --
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