dave strenski march 2012

Slide 1

Dave StrenskiMarch 2012

Birth and Death of a Solar Electron

He was alwaysso negativeBaby minus

Slide 2

Renewable Energy and a Renewed Economy for MichiganFebruary 29, 2008 by Senator Glenn S Anderson

“Consumers, businesses and manufacturers in Michigan currently pay $18 billion each year to import coal, oil and natural gas. Of that $18 billion we import 100% of the coal we use, 96% of the oil we consume for transportation fuels and 75% of our natural gas from other states. That money heads across the border each year to help workers and businesses in other states, and it does

nothing to reduce our dependence on fossil fuels, lower greenhouse gas emissions, diversify our state's economy or create

jobs here in Michigan.”

http://bloggingformichigan.com/archives/bfm/www.bloggingformichigan.com/showDiarye324.html

Could add $18 billon to Michigan’s economy every year!

Slide 2

Slide 3

Slide 4

KWH

Sunny Boy

325

KWH

KWH

ForwardMeter

ReverseMeter

Gen Meter

sun2005 2005 2005 2005 2007 2008

2008 2008 2008 2008 2008 2008

100 9885 534

327

store meters

disconnect inverter

photovoltaic panels

breaker panel

utility meters

Slide 5

Slide 6

Steeper for more uniform annual powerFlatter for maximum annual power

Tracking systemsSeasonal fixed panelsFixed panels

Silicon [Si]

Slide 7

+ n14 neutrons

14 protons

shell 1

shell 2

shell 3

valence electrons

Silicon [Si]

Slide 8

+ n14 neutrons

14 protons

shell 1

shell 2

shell 3

valence electrons

Slide 9

wires o

n the

top

wires on the bottom

silicon doped with boron(holes, few less electrons)

silicon doped with phosphorus(few extra electrons)

Building a Solar Cell

Slide 10

+-

+- +-

+-

+-

holes migrate down

phot

ons

phot

ons

phot

ons

phot

ons

phot

ons

electronsmigrate up

Slide 11

Uni-solarMade in Michigan

Amorphous Silicon

Mono and Polycrystalline Silicon

Slide 12

KWH

Sunny Boy

325

KWH

KWH

ForwardMeter

ReverseMeter

Gen Meter

sun2005 2005 2005 2005 2007 2008

2008 2008 2008 2008 2008 2008

100 9885 534

327

store meters

disconnect inverter

photovoltaic panels

breaker panel

utility meters

Slide 13

UL listedClean power

Shuts offs if grid is downPowered by solarQuite and Cool

Displays power generated

DC in

AC out

time

volt

age AC

volt

age DC

time

Slide 14

Standard breaker240 volt, 20 amp

back fed

Slide 15

4:00 am

OFF

forwards

Slide 16

8:00 am

direct

current

alternating

current

forwards

Slide 17

11:00 am

direct

current

alternating

current

forwards

Slide 18

1:00 pm

direct

current

alternating

current

backwards

Utility supplies power to the transmission lines

Power is distributed to the neighborhood

Solar panels start generating power

Slide 19

Utility supplies power to the transmission lines

Power is distributed to the neighborhood

Solar panels start generating power

One less shovelful of coal is needed at the utility power plant

Slide 20

Slide 21

In to the store

Out of the store

Generatedfrom panels

data

to la

ptop da

ta to

lapt

op

Slide 21

Slide 22

Slide 23

Solar Economics2000 sq. ft. home440 KWH/month (average)16c per KWH (2011)440/30 = 14.7 KWH (day), round up to 15 KWH per day on average

Slide 24

323 Oak Street, Ypsilanti

Avg KWH per month = 440

$50.93 / 367 = $0.139/kwh$43.09 / 269 = $0.160/kwh$37.60 / 218 = $0.173/kwh$48.18 / 308 = $0.156/kwh Avg = $0.157/kwh

Slide 25

Solar Economics

4 hour of sun per day, assumes panels are facing south tilted at latitude.Assume 80% system efficiency15 KWH / 4 hr * 1.2 = 4.5 KW (added 20% for efficiency)4500 watt would be about 18 solar panels at 250w per panel.

2000 sq. ft. home440 KWH/month (average)16c per KWH (2011)440/30 = 14.7 KWH (day), round up to 15 KWH per day on average

Slide 26

Slide 27

Solar installation cost = $3 to $7/watt installed4500w * $3/w = $13,500 4500w * $7/w = $31,500Minus 30% federal tax credit $13,500 * 0.7 = $9,450 $31,500 * 0.7 = $22,050

Cost of electricity for 440kwh/month

Solar Economics

yrs 16c 18c 20c 22c

5 $4,224 $4,752 $5,280 $5,808

10 $8,448 $9,504 $10,560 $11,616

15 $12,672 $14,256 $15,840 $17,424

20 $16,896 $19,008 $21,120 $23,232

25 $21,120 $23,760 $26,400 $29,040

4 hour of sun per day, assumes panels are facing south tilted at latitude.Assume 80% system efficiency15 KWH / 4 hr * 1.2 = 4.5 KW (added 20% for efficiency)4500 watt would be about 18 solar panels at 250w per panel.

2000 sq. ft. home440 KWH/month (average)16c per KWH (2011)440/30 = 14.7 KWH (day), round up to 15 KWH per day on average

Slide 28

Costs are coming down, and volumes are going up.

Slide 29

¼ useful

3/4 wasted

Slide 30

Slide 31

Ypsilanti Solar Photovoltaic Case Studies

Slide 32Shadow (bad)

190 watts 54.8 max volt 3.47 max amp 31 pounds 35.3” x 51.9” $1000

Ypsilanti Food Cooperative – 2005312 River Street, Ypsilanti, Michigan

190 x 4 = 760 watts$6000 ($7.90/watt)

Slide 33

Ypsilanti Food Cooperative – 2007312 River Street, Ypsilanti, Michigan

190 x 5 = 950 watts$1000 upgrade ($7.37/watt)

No shadows

Slide 34

Ypsilanti Food Cooperative – 2009312 River Street, Ypsilanti, Michigan

190 x 12 = 2280 watts$9,500 upgrade ($7.24/watt)

unused inverter , -$500 ($7.00/watt)

Slide 35

Ypsilanti Food Cooperative – 2010312 River Street, Ypsilanti, Michigan

White roof added later.Should improve reflectivity.

Slide 36

City of Ypsilanti, City Hall – 20101 South Huron, Ypsilanti, Michigan

205 x 12 = 2460 watts$27,300 ($11.10/watt)

Extra cost due to location, and engineering services

Slide 37

River Street Bakery – 2011312 River, Ypsilanti, Michigan

200 x 30 = 6000 watts$44,000 ($7.33/watt)

Slide 38

Adams School – 2011312 River, Ypsilanti, Michigan

240 x 10 = 2400 watts

Slide 39

Solar Ypsilanti: SolarYpsi.orgYpsilanti Food Cooperative: 734-483-1520 YpsiFoodCoop.orgCity of Ypsilanti: 734-483-1100 CityofYpsilanti.com

Federal Tax Incentives: www.energy.gov/taxbreaks.htmDTE Energy Solar Currents: www.dteenergy.com/solar

Great Lakes Renewable Energy Association: www.glrea.orgMidwest Renewable Energy Association: www.the-mrea.org

HomePower magazine: www.homepower.comSolar Today magazine: www.solartoday.orgSolar Tour: www.nationalsolartour.org