4) The Systems: Solaflect Tracker

We have 14 systems in mind (PV, geothermal, Trombe wall, thermal mass, etc.) to integrate into the SunCottage and get it to meet our goals. First and foremost is the photovoltaic system. We chose to go with a mobile tracker that follows the sun: 

 

The Solaflect company is located in Norwich, VT so very local. It was founded by a classmate of mine in the class of 1978 at Dartmouth, Bill Bender.

We primarily chose this tracker because by moving the panels perpendicular to the sun, it yields 40% more electricity per solar panel. 

 

 

 

A tracker can produce up to 40 kWh of power on a cloudy day. To put in perspective our main house uses approximately 30 KWh per day. Our estimate is that the SunCottage will use substantially less. We'll have efficient lighting, a heat pump hot water heater and fewer electronics, which use an amazing amount of electricity when you look into it.

The big unknown is how much electricity will be used to run the heat pump geothermal heating system. I read an estimate out of Halifax that quoted 19 kWh if your heat pump runs 80% of the time. So, on sunny days we'd be in good shape to cover all the electric needs of the SunCottage. 

 

Solaflect has an interesting page online that records the daily output of their tracker located behind Baker Library in Hanover. Check out today's energy production:

 

Kiosk Data from the Dartmouth College Solar Tracker

 

  

Our plan is to install a Tesla PowerWall II battery. Which can store two to three days worth of electricity to power the SunCottage in outages. With reduced power consumption and average sunshine, the aim is to be able to be capable of being off-grid.

 

 

 

 

 

 

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Previous Posts:

36) Available for Rent!

                   February 13, 2020 

35) Furnishings & Triskelions

                   April 23, 2019 

34) Green Roof & Appliances

                   August 15th, 2018 

33) Between Snow & Summer

                   May 27th, 2018 

32) Sauna, Painting, Tile & Nest

                   April 1st, 2018 

31) Tesla, Geothermal ... Plasterers

                   February 17, 2018 

30) Solar Tracker is Online!

                   December 31, 2017 

29) Grid Connection & New Panels

                   December 31, 2017 

28) Interior Work

                   December 24, 2017 

27) Views of the Exterior

                   December 22, 2017 

26) Woodchips & a Bifacial Tracker

                   December 15, 2017 

25) Well Capping & A Minor Disaster

                   December 7, 2017 

24) Deep Wells, Green Roof & Chips

                   November 24, 2017 

23) Roofing, Windows, Bridge & Time

                   November 14, 2017 

22) The Crew & the SolaFlect Pad

                   October 31, 2017 

21) Walls & the Earth Tube

                    September 30, 2017 

20) Framing & Plan Change 

                    August 31, 2017

19) Foundation, ICFs & Radiant 

                    July 31, 2017

18) Demolition, Firemen & Footings 

                    June 15, 2017

17) Floor Plans   

                    June 2, 2017

16) The SunCar   

                    May 31, 2017

15) The Green Roof   

                     May 30, 2017

14) Energy Recovery- ERV or HRV?   

                     May 25, 2017

13) Triple Pane Windows, ICFs

                     May 24, 2017

12) Hot Tub-Small but Beautiful  

                     May 20, 2017

11) Solar Chimney 

                     May 18, 2017

10) The Tesla Battery- The Heart     

                     May 3, 2017

9) The Bottle Wall   

                     May 1, 2017

8) On Whey and Woodchips   

                     April 27, 2017

7) Geothermal  

                     April 13, 2017

6) Key Elements of the Building 

                     March 2, 2017

5) A True Passive House?                         

                     Jan. 26. 2017

4) The Systems: Solaflect Tracker   

                     Dec. 14, 2016

3) What to Build  

                     Nov. 23, 2016

2) The Story of the Old Cottage  

                     Oct. 22, 2016

1) SunCottage Genesis                         

                     August 29, 2016

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