HomeMy WebLinkAboutB18-0472_10-9-18 - SSCV Clubhouse - Solar Calculations_1540920193 (2).pdfPage 1 of 4 10/16/2018
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: SSCV Clubhouse
598 Vail Valley Drive
Vail, CO 81657
System Layout: Single Panel = 5.32ft tall X 3.67ft wide
Panel Arrangement: see layout below; panels oriented in the landscape position,
mounted flush on the roof.
The Holy Cross electric meter, PV Production meter, disconnect, and inverter to be located inside of the
building, in the electrical room.
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
HCE, PV meter, disconnect,
and inverter (inside building,
electrical room)
Panel arangement and wiring not reviewed or approved
ROUGH ONLY
10/30/18
Page 2 of 4 10/16/2018
Calculations
39.6kW System Size (STC)
110 Solaria PowerXT solar panels @ 360 watts
110 SolarEdge P370 optimizers
1 SolarEdge SE43.2kUS inverter (comprised of 3 x 14.4kW inverters) (9-17 min-
max optimizer/string length)
Inverter “1” – 3 strings of 12/12/13 modules/optimizers;
Inverter “2” – 3 strings of 12/12/13 modules/optimizers;
Inverter “3” – 3 strings of 12/12/12 modules/optimizers
Fixed array tilt angle: 14.04º/18.43º
Array azimuth: 180º/90º/270º (where 180º is magnetic south)
Estimated Production: 55,405kWh/year (not including shading)
Maximum PV System Voltage: 690.7
Voc = 47.7V/module
47.7V x 1 module = 47.7V
Temperature correction factor 690.7(A)
STC = 25°C, Temperature Coefficient (Voc) = -0.29 %/°C
(-40°C - 25°C) = 65°C
47.7V + (-65°C x (-0.29%/°C x 47.7V) x 1 module) = 47.84V
Maximum PV Source Circuit (String) Current: 690.8 (A)(1)
Isc = 9.56A
9.56A x 1.25 = 11.95A
Maximum PV Output Circuit (Array) Current (per inverter): 690.8 (A)(2)
Max Input for SE43.2kUS inverter = 114A (38A/individual inverter)
Inverter Output Circuit Current: 690.8 (A)(3)
SE43.2kUS 120A @ 208V per phase
10/30/18
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Conductor Sizing
SE14.4KUS Panel/Optimizers to Inverter (combined string):
Inverter limit 38A combined string 690.8 (B)(1)
38A x 1.25 = 47.5A
#8THHN Table 310.16
55A (90ºC column, see note 240.4(D))
No Conduit fill adjustment Table 310.15 (B)(2)(a)
SE14.4KUS Panel/Optimizers to Inverter (separate strings):
13 panels x 360w = 4,680w ÷ 400v = 11.7A
11.7A x 1.25 = 14.625A
#10 THWN-2 Table 310.16
40A (90ºC column, see note 240.4(D))
Temperature correction factor Table 310.16
40A x .77 = 30.8A
Conduit fill adjustment Table 310.15 (B)(3)(a)
Use .8 for 4-6 current carrying conductors
30.8A x .8 = 24.6A
SE43.2kUS Inverter to Disconnect, Production Meter and Backfeed Point:
120A @ 208V
120A x 1.25 = 150A 690.8 (B)(1)
1/0 THHN Table 310.16
150A (75ºC column)
No Conduit fill adjustment Table 310.15 (B)(2)(a)
No Temperature correction factor Table 310.16
150A 3p Overcurrent Protection Device
Conductors may be oversized for voltage drop
10/30/18
Page 4 of 4 10/16/2018
6 #10 PV Wire
1# 6G Bare Cu
Conductors in Free Air
Inverter w/ Integrated DC Disconnect
SolarEdge SE43.2kUS, NEMA 3R
Max AC Output: 120A @ 208V DC Grounding
Electrode Conductor
solid bare #6 Cu
per NEC 250.66(C)Service Panel
Line Diagram
SSCV Clubhouse
598 Vail Valley Drive
Vail, CO 81657
39.6kW Utility Interactive Photovoltaic
System
Modules: 110 Solaria PowerXT 360
Voc = 47.7V
Isc = 9.56A
Optimizers: 110 SolarEdge P370
Inverter: SolarEdge SE43.2kUS
(= 3 x 14.4kUS)
3 Strings X 12/12/13 Modules/Inverter
3 Strings X 12/12/13 Modules/Inverter
3 Strings X 12/12/12 Modules/Inverter
Operating Voltage: 400V
Operating Current: 27.1A
Max System Voltage: 600V
Max Output Current: 45A
Tilt Angle: 14.04º/18.43º
Array Azimuth: 180°/90º/270º
Production: 55,405kWh/yr
Notes:
- See Calculation Sheet for conductor
sizing.
- All conductors are copper unless
otherwise noted.
- Inverter listed (UL-1741) to de-
energize upon loss of utility voltage
per NEC 690.61.
- Inverter has integral ground-fault
protection per NEC 690.5
- 208V 3 Phase Service Panel rating
of 800A (bus rating 800 amp and 800
Main disconnect) to accommodate
800A + 150A = 950A supply (up to
120% of connected power sources
from residential installations per NEC
690.64(B)(2))
Array mounted on roof
110 Solaria PowerXT 360w Solar Panels
110 SolarEdge P370 DC Optimizers
In Electrical
Room
Pass-Thru
Box
Located on
roof Placard on meter and main panel stating
”Photovoltaic System Connected”
per Holy Cross specifications
~+/-200'
MC Cable
2 # 8 THWN-2
1 #10 THWN-2 G
OR
¾" C EMT
6 #10 THWN-2
1 #10 THWN-2 G
14 15 16 25...
26 27 28 37...
Backfeed
Breaker:
150A
3p
208v
+/-5'
¾" C EMT/PVC/FNMC/other
4 1/0 THHN
1 #6 Ground
150A
1 2 3 13...
PV
Disconnect
>=150A
Adjacent to
meter
Net Meter
Production
Meter w/ lever
bypass
adjacent to
net meter
37 Panels and
Optimizers
(same as above)
36 Panels and
Optimizers
(same as above)
10/30/18