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Page 1 of 4 4/23/2015
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: Dobyns Residence
3080 Booth Falls Road
Vail, CO 81657
Equipment: Panels: 34 Phono Solar PS260M-20/U black solar panels @ 260watts
Inverter: SolarEdge SE7600A-US + 34 SolarEdge P300 Optimizers
Mounting Equipment: Unirac racking system with S5 mounting feet
Monitoring: SolarEdge Remote Monitoring Service
System Layout: Single Panel = 5.38ft tall X 3.26ft wide
Panel Arrangement: 3 rows of 8and 2 rows of 5 panels oriented in the portrait position,
mounted flush on the south facing roof
Holy Cross electric meter located on east side of home. PV disconnect and inverter to be located
adjacent to meter.
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
Holy Cross Meter,
Inverter and PV
Disconnect
Page 2 of 4 4/23/2015
P.O. Box 7627, Avon, CO 81620 | P: 970.306.4233 | F: 866.403.3485 | www.activeenergies.com
Calculations
8.84kW System Size (STC)
34 Phono Solar PS260M-20/U solar modules @ 260watts
35 SolarEdge P300 Optimizers
1 SolarEdge SE7600A-US inverter (2 strings of 17 modules/optimizers)
Fixed array tilt angle: 9.46º
Array azimuth: 195º (where 180º is south)
Estimated annual power production: 11,762kWh
Maximum PV System Voltage: 690.7
Voc = 38.1V/module
38.1V x 1 module = 38.1V
Temperature correction factor 690.7(A)
Temperature Coefficient (Voc) = -0.33%/°K
(-60°C (-.0033) = .198%
((.198% x 38.1V) x 1 panels) + 38.1V = 45.6V
Maximum PV Source Circuit (String) Current: 690.8 (A)(1)
Isc = 8.85A
8.85A x 1.25 = 11.1A
Maximum PV Output Circuit (Array) Current: 690.8 (A)(2)
4,420w / 350v = 12.6A per 17 string
SE7600A-US inverter limit 23A combined string
Inverter Output Circuit Current: 690.8 (A)(3)
32A @ 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 4/23/2015
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 (single string):
4,420w / 350v = 12.6A per 17 string
12.6A x 1.25 = 15.8A
#10 USE-2 Table 310.16
40A (90ºC column, see note 240.4(D))
Conduit fill adjustment Table 310.15 (B)(3)(a)
Use .8 for 4-6 conductors
40A x .8 = 32A
Temperature correction factor Table 310.15 (B)(2)(b)
32A x .77 = 24.6A
Inverter to Disconnect to Service Panel:
Nameplate maximum continuous output current:
32A @ 240V
32A x 125% = 40A 210.19 (A)(1)
#8 THWN-2 Table 310.16
50A (75ºC column)
No temperature correction factor
No conduit fill adjustment
Overcurrent Protection Device
40A two pole breaker Per Manufacturer Specification
Conductors may be oversized for voltage drop