SOLARTRICITY FOR ALAMO HEIGHTS ISD, A DASH FOR SUCCESS

CPS SOLARTRICITY

CPS WILL PAY 27 CENTS PER KILOWATT FOR 20 YEARS UP TO 1 MW PER CUSTOMER.

CURRENTLY CPS CHARGES AHISD 7 CENTS A KILOWATT.

DERATE FACTOR

Expected loss from:

DC wiringAC wiringSoilingEfficiency of inverter(s)Efficiency of solar panel (because a panel is a current source)

WEATHER FACTOR

Typical climateRain daysSun daysTemperature

$383,000 PER YEAR POTENTIAL EARNINGS

MONOCRYSTALINE

Slices from single crystalBetter production than polycrystals because crystals are more orderlyPotentially longer lifeGrown from a circle then truncated to max out panel coverage

POLYCRYSTALINE

Grown in a ribbon or blockFull panel coverage

THIN FILM

Different crystal technology such as CIGSTypically half the power level of crystals per square footMore wind resistant, multiple applications

Photo from articlebase.comGOAL IS FOR HIGHEST WATTAGE PER SQUARE FOOT

FULL GOODS SELF BALLASTED ARRAY, POLYCRYSTALINE

MONOCRYSTALINE

LADY BIRD JOHNSON MS, CIGS vapor deposition , photo courtesy of Gridpoint

photo from Solarpowerrocks.com

MULTIPLE SMALL INVERTERS

Maintain majority of system operation if inverter fails.Off the shelf replacementEasier installation due to smaller sizeMore connections requiredMore system complexitySelection based on electrical requirements

LARGE INVERTERS

Single or minimal points of connection.More capacity per inverter.Potential long lead time for parts/replacements.Inverter goes down, whole system goes down.Lower system complexity.

INTERCONNECTIONTouch this you die

ROOF REPLACEMENT at HIGH SCHOOL

Inverter level monitoringString level monitoring

CPS OFFICE FACILITY, GREEN MOUNTAIN ROAD 6AM

CPS OFFICE FACILITY, GREEN MOUNTAIN ROAD 6:20AM

CPS OFFICE FACILITY, GREEN MOUNTAIN ROAD 6:45AM

SOLAR MOB APPROXIMATELY 10 MINUTES BEFORE DASH

CPS OFFICE FACILITY, GREEN MOUNTAIN ROAD, 6:58AM

FRONT DOOR, CPS FACILITYGREEN SHOES

SIGNING APPLICATION AND GETTING QUEUE NUMBER, CPS FACILITY 7:20AM

Lowell Tacker, AIA, LEED APONeill Conrad Oppelt Architects, Inc.Principalltacker@ocoarchitects.comSOLARTRICITY FOR ALAMO HEIGHTS ISD, A DASH FOR SUCCESS

Special thanks to David McFalls, PEGridpoint

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