Phase 1.1 Energy Projects McKinstry Essention, Inc., Contractor Puget Sound Solar LLC, Subcontractor Daniel J. Evans Library Photovoltaic System Evergreen State College Phase 1.1 Energy Projects Photovoltaic System Submittals McKinstry Essention, Inc., Contractor Puget Sound Solar LLC, Subcontractor Contents 3: System Description 4: Production calculations 7: Array location 8: Roof plan 9: Array Details 10: Schematic Diagrams 11: Panel ‘A’ details 12: Equipment schedule 13: Product cut sheets 28: Structural load charts O&M’s: Contact list Warranties Drawings SMA Inverter manual Sunny Web Box manual Unirac RapidRac Manual Evergreen PV installation manual Photovoltaic System Description This photovoltaic system consists of (44) Evergreen Solar polycrystalline ES-A 205 watt modules installed in four rows on a Unirac RapidRac ballasted mounting system, facing due south on the fourth floor roof of the Daniel J. Evans Library. The DC electricity generated is converted to, and synchronized with, the AC power in the building at 208 volts via two Sunny Boy SB5000US inverters, and fed into the building power system through an equipment distribution panel on the fourth floor. Any interruption of utility power to the building will cause the inverters to shut off, per UL 1741. When utility power is restored, after a five- minute wait, the inverters will resume operation automatically. The performance of the system is monitored through the Sunny Web Box, a communication device that generates a web page that can be viewed by any computer connected by network to the Web Box, and by anyone on the world wide web via the Sunny Portal, a free service of SMA. The system is self-regulating and normally requires no attention. SMA inverters automatically wake up each day and disconnect from the grid each night. PV mounting at low elevation angles, such as with the RapidRac usually leads to some accumulation of atmospheric dust and particulates at the lower edge of the modules. Due to the Library’s location in a forested area, dust will not be as much of a factor as will pollen. Some gentle cleaning may be needed from time to time. The system is designed to be in service for decades of clean energy production. 3 System Design and Production Calculations The roof of the Daniel J Evans Library offers excellent solar access but there are some obstacles on the skyline. The orientation of the building is 25 degrees East of South, so the clock tower only causes negligble shading. The other skyline object is the HVAC enclosure at the southwest corner of the fourth floor roof. This only causes minor shading near the end of the day from November through January, the darkest time of year. The tree line adds to the late-year losses. The sun chart below shows the extent of shading. The net loss to this shading is about 2% of the total possible production. The attached RETScreen model predicts an average production of 9.9 mWh/yr. 4 RETScreen® Solar Resource and System Load Calculation - Photovoltaic Project Site Latitude and PV Array Orientation Estimate Notes/Range Nearest location for weather data Olympia, WA See Weather Database Latitude of project location°N 47.0 -90.0 to 90.0 PV array tracking mode- Fixed Slope of PV array ° 10.0 0.0 to 90.0 Azimuth of PV array ° 0.0 0.0 to 180.0 Monthly Inputs Fraction of Monthly average Monthly Monthly average Monthly month daily radiation average daily radiation solar used on horizontal temperature in plane of fraction surface PV array Month (0 - 1) (kWh/m²/d) (°C) (kWh/m²/d) (%) January 1.00 1.03 3.5 1.24 - February 1.00 1.69 4.9 1.94 - March1.00 2.78 6.3 3.03 - April1.00 3.96 8.7 4.15 - May 1.00 5.01 11.9 5.11 - June1.00 5.59 14.9 5.63 - July 1.00 5.88 17.2 5.96 - August1.00 5.06 17.3 5.26 - September1.00 3.79 14.4 4.11 - October1.00 2.22 9.8 2.54 - November1.00 1.19 6.1 1.42 - December1.00 0.88 3.6 1.08 - Annual Season of use Solar radiation (horizontal) MWh/m² 1.19 1.19 Solar radiation (tilted surface) MWh/m² 1.26 1.26 Average temperature°C 9.9 9.9 Load Characteristics Estimate Notes/Range Application type - On-grid Return to Energy Model sheet Version 3.2 © Minister of Natural Resources Canada 1997 - 2005. NRCan/CETC - Varennes 11/3/2008; TESCpv.xls 5 RETScreen® Energy Model - Photovoltaic Project Training & Support Site Conditions Estimate Notes/Range Project name Evergreen State College See Online Manual Project location Olympia, WA Nearest location for weather data - Olympia, WA Complete SR&SL sheet Latitude of project location °N 47.0 -90.0 to 90.0 Annual solar radiation (tilted surface) MWh/m² 1.26 Annual average temperature °C 9.9 -20.0 to 30.0 System Characteristics Estimate Notes/Range Application type - On-grid Grid type - Central-grid PV energy absorption rate % 100.0% PV Array PV module type - poly-Si PV module manufacturer / model # Evergreen Solar/ ES-240 See Product Database Nominal PV module efficiency % 13.0% 4.0% to 15.0% NOCT °C 45 40 to 55 PV temperature coefficient % / °C 0.40% 0.10% to 0.50% Miscellaneous PV array losses % 4.0% 0.0% to 20.0% Nominal PV array power kWp 9.02 PV array area m² 69.4 Power Conditioning Average inverter efficiency % 94% 80% to 95% Suggested inverter (DC to AC) capacity kW (AC) 8.5 Inverter capacity kW (AC) 9.0 Miscellaneous power conditioning losses % 2% 0% to 10% Annual Energy Production (12.00 months analysed) Estimate Notes/Range Specific yield kWh/m² 143.1 Overall PV system efficiency % 11.3% PV system capacity factor % 12.6% Renewable energy collected MWh 10.561 Renewable energy delivered MWh 9.927 kWh 9,927 Excess RE available MWh 0.000 Complete Cost Analysis sheet Version 3.2 © Minister of Natural Resources Canada 1997 - 2005. NRCan/CETC - Varennes 11/3/2008; TESCpv.xls 6 Evergreen State College PV Array Location McKinstry Essention, Inc., Contractor – Puget Sound Solar LLC, Subcontractor Daniel J. Evans Library Level 5 7 ROOF PLAN Evans Library Roof Plan Level 5 (Fourth Floor Roof Plan) 8 Array Plan Detail 9 Panel ‘A’ One Line PV System Schematic Diagram 10 Panel ‘A’ Location and Detail 11 Photovoltaic Equipment Schedule Evergreen State College Phase 1.1 Energy Projects McKinstry Essention, Inc., Contractor Puget Sound Solar LLC, Subcontractor Item Quantity Description PV Modules 44 Evergreen Solar ES-A 205 Inverters 2 SMA SB5000US Panel 'PV' 1 Square D QO312L125GRB Panel 'PV' c.b. 2 Square D 2-pole 30A QO230 Panel 'A' c.b. 1 ITE 60A 208V 3-pole QP Q360 Lockable Disconnect 1 Square D HU362RB Ballasted Mount 44 Unirac RapidRac Frame w/mount Ballasted Mount 11 Unirac RapidRac Frame only Monitoring 1 Sunny Web Box Interface 2 Sunny Boy RS-485 modules 12 NEW ES-A SERIES 200, 205 & 210 W photovoltaic panels Best power tolerance available A range of high quality String Ribbon™ solar panels offering exceptional performance, cost effective installation and industry-leading environmental credentials made with our revolutionary wafer technology. • No power below nameplate Never pay for power you’re not getting • Get up to 5W more than nameplate* For enhanced field performance • Industry’s lowest voltage per watt rating Delivers the most cost-effective installs • UL4703 certified cables For use with the highest efficiency transformer-less inverters • New extended length cables Eliminates home-run wiring • New lockable connectors** Complies with the latest codes for accessible arrays • Most extensive range of mounting options Allows installs virtually anywhere and anyhow • Smallest carbon footprint of any manufacturer For the greenest of the green • 100% cardboard-free packaging Minimizes job site waste and disposal costs • 5 year workmanship and 25 year power warranty *** Born in the USA *Maximum power up to 4.99 W above nameplate rating; **Locking sleeve not supplied with the panel. ***For full details see the Evergreen Solar Limited Warranty available on request or online. 13 This product is designed to meet UL 1703, UL 4703, UL Fire Safety Class C, IEC 61215 Ed.2 and IEC 61730 Class A standards. String Ribbon is a patented technology and registered trademark of Evergreen Solar, Inc. Electrical Characteristics Mechanical Specifications Standard Test Conditions (STC)1 PANEL ID LABEL ES-A-200 ES-A-205 ES-A-210 -fa2* -fa2* -fa2* 2.2 4.9 2 mp P 200 205 210 W 3.1 2.3 JUNCTION BOX tolerance P -0/+4.99 -0/+4.99 -0/+4.99 W (IP65) 8x ø.16 PANEL GROUNDING Pmp, max 204.99 209.99 214.99 W SERIAL NUMBER HOLE Pmp, min 200.00 205.00 210.00 W ηmin 12.7 13.1 13.4 % 32.5 3 CABLES Pptc 180.6 185.2 189.8 W (10 AWG, UL4703, PV-WIRE) Vmp 18.1 18.4 18.7 V Imp 11.05 11.15 11.23 A 42.1 Voc 22.5 22.8 23.1 V 65.0 (+/-0.1) 10x ø.26 PANEL MOUNTING HOLE Isc 12.00 12.10 12.20 A ID LABEL FOR ¼" BOLT Nominal Operating Cell Temperature Conditions (NOCT)4 MC® LOCKABLE 0 CONNECTORS NOCT T 44.8 44.8 44.8 C (TYPE 4) Pmax 146.4 150.1 153.7 W 26.7 Vmp 16.7 16.8 17.0 V 16.3 2.8 CLEAR ANODIZED 13.0 12x FRAME ALUMINUM FRAME Imp 8.76 8.93 9.04 A DRAINAGE HOLE 2.2 Voc 20.5 20.7 21.0 V 35.9 1.8 (+0.02/-0) 37.5 (+/-0.1) Isc 9.60 9.68 9.76 A 1 1000 W/m2, 25°C cell temperature, AM 1.5 spectrum; All dimensions in inches; panel weight 41 lbs 2 Maximum power point or rated power 3 2 At PV-USA Test Conditions: 1000 W/m , 20°C ambient temperature, Product constructed with 114 poly-crystalline silicon solar cells, anti-reflective 1 m/s wind speed 4 800 W/m2, 20°C ambient temperature, 1 m/s wind speed, AM 1.5 spectrum tempered solar glass, EVA encapsulant, polymer back-skin and a double-walled * f-framed, a-low voltage, 2-matt blue (textured) cells anodized aluminum frame.