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Page 1 of 4 10/13/2015
P.O. Box 7627, Avon, CO 81620 | P: 970.306.4233 | F: 866.403.3485 | www.activeenergies.com
Solar Installation Information
Vendor: Active Energies Solar LLC
PO Box 7627
Avon, CO 81620
(970-306-4233/info@activeenergies.com)
Site: Johnson Residence
Sunlight North Condominiums
2475 Garmisch Drive #5
Vail, CO 81657
System Layout: Single Panel = 5.38ft tall X 3.28ft wide
System Size = 13.52ft tall X 16.18ft wide (including mounting equipment)
Panel Arrangement: 2 columns of 5 panels oriented in the landscape position, mounted
flush on the southeast facing roof
Equipment: Panels: 10 LG315N1C-G4 @ 315 watts
Inverter: 10 SolarEdge P320 optimizers + 1 SolarEdge SE3000A-US inverter
Mounting Equipment: Unirac racking system with Easy Feet
Monitoring: SolarEdge Remote Energy Monitoring System
Holy Cross electric meter located on in the southwest side of the condo complex. The PV
disconnect and inverter to be located on the northwest side (back) of the individual unit. Meter
placard required for Holy Cross.
Minimum Designed Temperature: -40°F
Maximum Ambient Design Temperature: 140°F
All AC wiring to be completed by a Colorado licensed master electrician
All DC wiring to be overseen by NABCEP certified installer
PV disconnect &
inverter
Holy Cross meter
Page 2 of 4 10/13/2015
P.O. Box 7627, Avon, CO 81620 | P: 970.306.4233 | F: 866.403.3485 | www.activeenergies.com
Calculations
3.15kW System Size (STC)
10 LG315N1C-G3 solar modules @ 315watts
10 SolarEdge P320 Optimizers
1 SolarEdge SE3000A-US inverter (1 string of 10 modules/optimizers)
Fixed array tilt angle: 18.43º
Array azimuth: 105º (where 180º is south)
Estimated annual power production: 4,068kWh
Maximum PV System Voltage: 690.7
Voc = 40.6V/module
40.6V x 1 module = 40.6V
Temperature correction factor 690.7(A)
STC = 25°C, Temperature Coefficient (Voc) = -0.28 %/°C
(-40°C - 25°C) = 65°C
40.6V + (-65°C x (-0.28%/°C x 40.6V) x 1 module) = 48V
Maximum PV Source Circuit (String) Current: 690.8 (A)(1)
Isc = 10.02A
10.02A x 1.25 = 12.5A
Maximum PV Output Circuit (Array) Current: 690.8 (A)(2)
3,150w / 350v = 9A per 10 string
SE3000A-US inverter limit 9.5A combined string
Inverter Output Circuit Current: 690.8 (A)(3)
12.5A @ 240V
John Wiles, “Photovoltaic Power Systems and the National Electrical Code: Suggested
Practices”, 2005, pp. E1-E25.
pdf version online at: http://www.nmsu.edu/%7Etdi/Photovoltaics/Codes-
Stds/PVnecSugPract.html
Page 3 of 4 10/13/2015
P.O. Box 7627, Avon, CO 81620 | P: 970.306.4233 | F: 866.403.3485 | www.activeenergies.com
Conductor Sizing
Pass Thru Box from Optimizers to Inverter (per combined string):
SE3000A-US inverter limit 12.5A combined string
9.5A x 1.25 = 11.9A
#10 THWN-2 Table 310.16
40A (90ºC column, see note 240.4(D))
Conduit fill adjustment Table 310.15 (B)(3)(a)
No conduit fill adjustment
Temperature correction factor Table 310.15 (B)(2)(b)
40A x .77 = 30.8A
Inverter to Disconnect to Service Panel:
Nameplate maximum continuous output current:
12.5A @ 240V
12.5A x 125% = 15.6A 210.19 (A)(1)
#10 THWN-2 Table 310.16
30A (75ºC column)
No temperature correction factor
No conduit fill adjustment
Overcurrent Protection Device
20A two pole breaker Per Manufacturer Specification
Conductors may be oversized for voltage drop