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December 2009 - SCTE proposes solar solution in support of our Smart Energy Management Initiative – SEMI(Conceptual artwork from Alpha Technologies)
December 2009 - SCTE proposes solar solution in support of our Smart Energy Management Initiative – SEMI(Conceptual artwork from Alpha Technologies)
December 2009 - Online mapping reference check to see how much unobstructed southern facing rooftop SCTE has on our building (space for a total of 18 kW)– SCTE receives bids for the project
December 2009 – Output of sun chart for 140 Philips Rd, Exton PA 19341
February 2010 - SCTE selects Alpha Energy as the solar project solution provider
April 2010 - After submitting permit requests SCTE and Alpha needed to appear before the township board to get approval of proposed installation – safety and aesthetics were taken into consideration
July 2010 - An interconnect application needed to be filed with the local electricity grid provider, giving SCTE and Alpha permission to connect the new solar system to their system
March 2010 - Site inspection illustrating panel height (5’ 9”) for township approval
May 2010 - Power purchase agreement (PPA) and contract negotiations completed between Alpha and SCTE to insure fair system options for both companies
Power Purchase Agreement
Monthly Production Dollars
11.28 kW Electricity Production
May 2010 – Alpha drafts engineering documents and hardware is ordered
June 2010 - SMA inverters, Sharp panels and Shletter aluminum mounting system
July 2010 - Lift used to move materials onto the roof deck
July 2010 - First load of materials unloaded onto the roof
July 2010 - Cutting the “spaghetti matting” to shape
July 2010 - Placing the pans precisely over the building’s support joists
July 2010 - Lifting the pavers that will weigh the pans down
July 2010 - Getting ready to finish up placing the pans
July 2010 - Placing the support frames into position over the center of the pans
July 2010 - Placing the support frames into position over the center of the pans
July 2010 - Placing the support frames into position over the center of the pans
July 2010 - Assembling the rails and frame support
July 2010 - Assembling the rails and frame support
July 2010 - Checking the second section rack placement and preparing that build
July 2010 - Making progress on the racking assembly
July 2010 - First section of racking assembled
July 2010 - Making progress on the rack installation
July 2010 - Racking assembly completed
July 2010 - Racking assembly completed
July 2010 - Racking assembly completed
July 2010 - Average July full sun roof top temperature (164 degrees Fahrenheit)
July 2010 - Beginning work of hanging the panels
July 2010 - Hanging the first panel – ensure that the placement is square
July 2010 - Checking the square reference point
July 2010 - Tying the square reference string into place
July 2010 - Squaring off the second row of panels
July 2010 - Beginning the install of second row of panels
July 2010 - Placing the upper row of panels
July 2010 - Placing the upper row of panels
July 2010 - Hanging the upper row of panels
July 2010 - Progress hanging the second row of panels
July 2010 - Temperature of the back of panels (full sun - 136 degrees Fahrenheit)
July 2010 - Installing the conduit mounting brackets to the frame
July 2010 - Installing the conduit mounting brackets to the frame
July 2010 - Getting the combiner box ready on the rooftop
July 2010 - Combiner box ready for conduit and cabling
July 2010 - Preparing to mount the conduit
July 2010 - All panels racked and ready for wiring procedures
July 2010 - Look down the back of the array after panel wire clean up is completed
July 2010 - Cleaning up positive and negative panel connection cables with wire ties
July 2010 - Cleaning up the positive and negative panel cables with panel clips
July 2010 - First row of wind shield deflector braces installed
July 2010 - First row of wind shield deflector braces installed
July 2010 - Grounding clip installed on every panel and rack piece
July 2010 - Fishing the DC and ground wire through the conduit under the array
July 2010 - Installing the first disconnect box
July 2010 - Working on the disconnect boxes
July 2010 - Lightning arrestor attached to the roof top disconnect boxes
July 2010 - Conduit taking the DC power from the disconnect boxes to the combiner box
July 2010 - Combiner box taking the power down the side of the building
July 2010 - Disconnect box on the roof
July 2010 - Disconnect boxes on the roof
July 2010 - Two disconnect switches on the roof
July 2010 - Sensor control box mounted adjacent to the array
July 2010 - Anemometer and ambient air temperature devices
July 2010 - Back of panel temperature sensor
July 2010 - Look down the back of the array at the wind shields
July 2010 - Completed arrays
July 2010 - Completed arrays
July 2010 - Completed arrays
July 2010 - Completed arrays
July 2010 - Completed arrays
July 2010 - Completed arrays
July 2010 - View from ground level at the side of SCTE’s building
July 2010 - View of the panels from ground level behind SCTE’s building
July 2010 - Drilling a hole in the cement block to feed the cable into the building
July 2010 - Examining the internal workings of the inverter
July 2010 - Getting ready to mount the new meter
July 2010 – Mounting the new inverters and system boxes
July 2010 - Mounting the inverters and new breaker boxes
July 2010 - Getting ready to pull cable
July 2010 - Preparing to pull the rooftop wires into the building
July 2010 - Preparing to pull the rooftop wires into the building
July 2010 - Preparing to pull the rooftop wires into the building
July 2010 - Completing the AC/DC wiring requirements
July 2010 - Completing the AC/DC wiring requirements
July 2010 - Preparing for the DC to AC wiring project
July 2010 - Installation of new system meter and circuit breakers
July 2010 - Brining the DC cable feed into the combiner box inside the building
July 2010 - Inverter statistics
July 2010 - Inverter output LCD board
July 2010 - Inner workings of the inverter shut off switch
August 2010 - Overview of the inner workings of the inverter
August 2010 - Initial look of the inverter receiving DC power from the panels
August 2010 - Initial reading of output coming off the panels
August 2010 - Alpha and SCTE team assembling on the roof for the launch ceremonies
August 2010 - Launch of the power purchase agreement and solar system
August 2010 - Alpha and SCTE team on the roof for opening day
Today - SCTE front lobby display
System Specifications• 11.28 kW DC• 10 kW AC• Phase: 3phase • Voltage: 208 • Frequency: 60Hz• 48 Sharp 235 mono-crystalline modules• Schletter ballasted racking system• 2 SMA Sunnyboy 5000US inverters• Data Monitoring – website, data logging, weather
and auto-alerts
