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Solaris Solar Solutions
120 Regent Street Kingston, ON K7L 1N3 Canada www.solarissolar.ca 613-515-1515 [email protected]
Dear Mr. Ayres,
Solaris Solar Solutions would like to thank you once again for giving our company the opportunity to submit this proposal.
Our team has prepared the optimal system design to meet your requirements. It consists of 19 PV modules mounted on
the rearmost wing of the Leahurst Building. The south-facing section of that roof offers ample space and an ideal angle
for flush mounted PV. The total installed capacity would be 4.75kW, satisfying the size requirements for an Ontario
MicroFIT contract. Energy generation would be 500kWh monthly or 120MWh over the lifetime of the system. This would
yield a yearly revenue of $2511 or $35,140 over the system's 20 year lifespan.
The main benefit of the proposed design is that it maximizes array size while preserving the historic integrity of the
Leahurst Building. Mounting the array on the rearmost section of the building hides it from public view, maintaining the
original look and historic character of such an esteemed and important Kingston landmark.
Upon acceptance of this proposal, we would forward an invoice for service to your office. If it meets with your
satisfaction, we could commence with providing equipment to the site and begin installation within five business days.
If you have any questions or concerns, please contact us by phone or email. If we do not hear from you, we would like to
send a follow-up email in a week's time, so please be sure to check your inbox.
Thank you once again for giving us the opportunity to submit this proposal. We look forward to working for you.
Best Regards,
Michael Clarke Lead Project Manager, Solaris Solar Solutions
About Solaris Solar Solutions
Solaris Solar Solutions Inc. is an Ontario company that specializes in residential PV installation and design. We pride ourselves in surpassing customer expectations on each and every project . Our guiding principles are: professionalism in work, honesty with clients and strict adherence to project deadlines. If you need your PV project on time and on budget, then Solaris is The Right Choice.
November 29th, 2013.
Mr. Paul Ayres, Building Manager
Kingston Psychiatry Hospital,
Leahurst Building
Kingston, On K7L 4X3
PV System Design Proposal
for the Leahurst Building
Client: Mr. Paul Ayres
Author: Michael Clarke
Date of Submission: November 29th, 2013
Course Codes: ESET 441/Writ 13
Instructor: Ian Kilborn
ii
Summary
This proposal puts forward an ideal PV system design for the Leahurst Building. It is intended to optimizes array size for
maximum power and revenue generation. It accomplishes this while remaining mostly hidden from public view while
maintaining the historic integrity of the building.
The specifics of the proposed system are as follows:
System Payback Period: 6.1 Years
Additional points of interest:
Extended warranties on major system components.
MicroFIT contract guaranteeing a 20 year rate of $0.395/kWh.
Flush mounted PV (no roof overhang).
Finally, included in the appendices of this proposal are:
A single line diagram of the system. Technical specifications. RetScreen model with energy and financial page.
System Components
Component Company Size Quantity Model Number
PV Modules Canadian Solar 4.75kW (250W each) 19 CS6P-250P
Solar Inverter Power-One 5kW 1 Aurora PVI-5000-TL
Racking Unirac - - SOLARMOUNT-E
Energy and Revenue Projections
Monthly Yearly Lifetime
Energy 500kWh 6MWh 120MWh
Revenue $210.00 $2511.00 $35,140.00
Cost Projections
Racking $2642.82
Electrical Components
$9117.30
Labour $2520.00
Permitting, etc. $800.00
Total $15,080.12
iii
Table of Contents Title Page ................................................................................................................................................................................. ii
Summary ................................................................................................................................................................................. ii
Table of Contents ................................................................................................................................................................... iii
List of Illustrations .................................................................................................................................................................. iv
Photovoltaics (PV) in Ontario .................................................................................................................................................. 1
The Leahurst Building: Project Background ............................................................................................................................ 1
Project Description .................................................................................................................................................................. 2
PV Array .............................................................................................................................................................................. 3
Racking ................................................................................................................................................................................ 4
Inverter, Disconnects and Utility Meter ............................................................................................................................. 6
Cost Estimates ......................................................................................................................................................................... 7
Racking ................................................................................................................................................................................ 7
Electrical Components ........................................................................................................................................................ 7
Labour ................................................................................................................................................................................. 8
Permitting, etc. ................................................................................................................................................................... 8
Energy Generation .................................................................................................................................................................. 9
Manufacturer’s Warranties .................................................................................................................................................. 11
Further Recommendations ................................................................................................................................................... 11
Conclusion ............................................................................................................................................................................. 12
References ............................................................................................................................................................................ 13
Appendix A - Single Line Diagram ......................................................................................................................................... 14
Appendix B - Conductors ...................................................................................................................................................... 16
Appendix C - System Sizing ................................................................................................................................................... 18
Wire Sizing Calculations .................................................................................................................................................... 19
Max Power Calculations .................................................................................................................................................... 20
Bonding Method ............................................................................................................................................................... 20
Appendix D - Manufacturer's Datasheets ............................................................................................................................ 21
AURORA Inverter .............................................................................................................................................................. 21
Canadian Solar 250W PV Module ..................................................................................................................................... 23
Unirac SOLARMOUNT-E Racking ....................................................................................................................................... 24
DC Disconnect Enclosure .................................................................................................................................................. 28
DC Fuse.............................................................................................................................................................................. 28
Electrical Utility Meter (Enclosure Only) ........................................................................................................................... 28
iv
AC Disconnect ................................................................................................................................................................... 28
Appendix E - RETScreen Analysis ......................................................................................................................................... 29
Appendix F - Warranty Information ..................................................................................................................................... 34
Aurora Inverter ................................................................................................................................................................. 34
Canadian Solar PV Module ................................................................................................................................................ 35
Unirac Racking ................................................................................................................................................................... 36
List of Illustrations
Page 2 Figure 1 The Proposed Leahurst Building PV System
Page 3 Figure 2 The PV Array
Figure 3 String Layout
Page 4 Figure 4 Racking
Page 5 Figure 5 Racking Components
Page 6 Figure 6 Major System Components with Conductors
Page 9 Figure 7 Energy Generation Graph
Page 11 Figure 8 Recommended Locations for Additional Arrays
Page 12 Figure 9 The Completed Leahurst Building PV Project
Page 15 Figure 10 Disconnects, Inverter and Meter Enclosure
Figure 11 Meter Base Hidden from Public View
Page 16 Figure 12 String Layout
Figure 13 DC and AC Conductors in the Inverter
Figure 14 MC4 DC Conductor
Page 19 Figure 15 PV Grounding Lug
Page 26 Figure 16 Flashing and Roof Penetrations
Figure 17 Flashing Assembly
Page 27 Figure 18 DC Disconnect
Figure 19 DC Fuse
Figure 20 Electrical Utility Meter Enclosure
Figure 21 AC Disconnect
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Photovoltaics (PV) in Ontario
Electricity supply in Ontario will undergo significant changes over the next 20 years. According to [1] "... demand for
electricity is expected to increase by 15% from 2010-2030." The contribution from PV will be [1] "... an expected 1.5% of
total generation by 2030." In recognising these facts, the provincial government has encouraged the development of PV
as an alternative and complementary generation source. Through the MicroFIT program, contract holders are paid a
generous rate of $0.395/kWh from electricity generated from rooftop PV systems. This has spurned many building
managers and homeowners to consider PV as an attractive investment opportunity.
In addition to offering significant financial return, PV has several inherit advantages over other forms of renewable
electricity. First, PV uses free sunlight as fuel. The cost and disposal of nuclear fuel is an enormous expense for that
industry. Secondly, PV can be located anywhere. This heavily contrasts with wind and hydro which require specific
environmental conditions to be viable. Finally, PV is comparatively inexpensive. The capital costs involved in the
construction of a nuclear plant, wind farm or hydro power station are enormous. It is through these competitive
advantages that PV has exploded as an industry, and Ontario continues to be a welcoming host for new PV projects.
This proposal describes once such project for the Leahurst Building in Kingston. The topics covered in this proposal include:
Project Background
Project Description
Cost Estimates
Project Energy and Financial Returns
Recommendations and Conclusion
The appendices include details on system design, warranty information and manufacturer's datasheets
The Leahurst Building: Project Background
Last month, Mr. Paul Ayres put out a request for proposal (RFP) for a PV system to be designed and installed on the roof
of the Leahurst Building. The motivation for the RFP was explicitly stated to be financial return on investment. It was also
stated that any proposed design must be mostly hidden from public view, maintaining the historical character of the
Leahurst Building.
Through this proposal, Solaris Solar Solutions will offer an ideal system designed to meet the client's specific needs. To
address the issue of unobtrusiveness, it is proposed to situate the array on the Northern wing of the Leahurst Building.
This would make it nearly invisible to the public from the front face of the building. To maximize revenue, it is proposed
the array be as large as possible, given the aforementioned constraints.
Solaris Solar Solutions has successfully designed and installed many systems with similar requirements. The company
understands the need to preserve the historic character of a public building. The company also has extensive experience
in creatively designing solar arrays to maximize their footprint on a roof.
Through acceptance of Solaris's proposal, the Leahurst Building can not only be transformed into revenue generating
asset, but in addition, become a showpiece for PV in Ontario.
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Project Description
It is critical that components selected for a solar project be of high quality and have flawless compatibility. Solaris has
extensive experience with selecting equipment that will work synergistically together to meet the needs of a project. In
this section of the proposal, equipment chosen for this project will be detailed, and design decisions influencing their
selecting will be explained. Finally, it will be demonstrated how the design satisfies utility requirements for successful
permitting and inspection.
Fundamentally, there are three categories of hardware that compose a PV system: racking, modules and solar
electronics. Design decisions that influence the choice of racking are ease of installation, quality of materials and
manufacturer's warranty. PV module selection is based on desired power output of the array, module price and whether
or not the manufacturer is a trusted brand. The choice of solar electronics is based upon meeting the power output
needs of the array, accommodating the chosen string size and satisfying utility safety requirements.
Figure 1: The Proposed Leahurst Building PV System
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PV Array
Figure 2: The PV Array
The South facing roof of the Northern wing of the Leahurst Building offers an ideal location for the PV array. This roof provides an ample footprint, few obstructions and acceptable pitch angle of 26.6°. Nineteen modules will be flush mounted with no roof overhang. The 4.75Kw's of power generated is administered through PVC conduits to the meter base for distribution to the Ontario electricity grid. The array is divided into two strings of nine and ten modules.
As a rule, it is optimal to choose an even number of modules for equal sized strings, however the chosen inverter is capable of handling odd numbered string sizes. Therefore, the chosen string size is nine and ten modules.
Figure 3: String Layout
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Racking
The racking to be used in this project is Unirac SOLARMOUNT-E hardware. The ease of installation, quality construction
and material warranty make this product an excellent choice. Included in the hardware package are flashing assemblies,
standoffs, flanges, flange clips (c-clamps), beams, splice retainers, mid and end clamps for the modules, and all required
screws, nuts and bolts.
Flashing assemblies facilitate the mounting of racking to the roof. The roof joists are 24" center to center, and the
flashing assemblies affix to every second joist. Standoffs attach to the flashing assembly, and provide structural support
for the racking. Flanges and c-clamps, mounted to the standoffs, hold the beams straight along the roof. Finally, mid and
end clamps secure the PV modules to the entire racking assembly.
Figure 4: Racking
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Figure 5: Racking Components
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Inverter, Disconnects and Utility Meter
PV Modules generate direct current, so a solar inverter is required to convert current to AC before distributing it to the
grid. To match the 4.75kW generated from the array, a 5kW Power-One Aurora inverter was chosen. The main reason
for choosing this inverter was that is offers two MPPT inputs to accommodate the strings of nine and ten modules. If the
inverter did not have this feature, a combiner box would have to be used and the array sized reduced.
The Ontario Power Authority (OPA) requires that PV systems have both DC and AC manual disconnect devices. The
proposed design satisfies this requirement with Midnight-Solar DC disconnect and GE AC disconnect devices.
Finally, a utility meter is included in the design. As a consumer, one can only purchase a meter enclosure, as the local
utility has sole authority to install the meter itself.
Figure 6: Major System Components with Conductors
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Cost Estimates
Racking
Component Quantity Unit Price Sub-Total
Flashing 56 12 pack
Single
$118.69 [2]
$10.79 [2]
$474.76 $86.32
Stand-Off 56 12 pack
Single
$170.00 [2]
$16.39 [2]
$680.00 $131.12
L Flange 56 $3.19 [2] $178.64
Flange Clamp* 56 $2.00 * $112.00 *
"D" Size Mid-Clamp 26 $2.19 [2] $56.94
"D" Size End-Clamp 24 $1.85 [2] $44.40
208" Rail 12 $71.69 [2] $860.28
Splice Bar 4 $4.59 [2] $18.36
TOTAL $2642.82
* Estimate.
Electrical Components
Component Quantity Unit Price Sub-Total
250 Watt Canadian Solar PV Module
19 $280.50 [2] $5329.50
5kW Aurora Inverter 1 $2539.00 [2] $2539.00
Electrical Meter 1 $66.00 [3] $66.00
DC Disconnect 2 $220.00 [4] $440.00
DC Fuse (20A, 600Vdc) 2 $119.00 [4] $238.00
Module Wiring (10' MC4 extension cord)
10 $17.10 [2] $171.00
String Wiring (50' MC4 extension cord)
4 $44.70 [2] $178.80
AC Wiring 4x 1-foot $5.00 [3] $5.00
AC Disconnect with CB 1 $100.00 [3] $100.00
Conduit and Fittings 1 $50.00 [3] $50.00
TOTAL $9117.30
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Labour
Service Rate Employees Estimate Time
Sub-Total
Racking Installation $45/hr 3 10 hours $1350.00
Module Installation $45/hr 3 6 hours $810.00
Electrical Installation $90/hr 1 4 hours $360.00
TOTAL $2520.00
Permitting, etc.
* Estimate.
GRAND TOTAL $15,080.12
Service Fee
MicroFIT Aplication Fee $126.00 *
Kingston Utilities Meter Locate Inspection $200.00 *
Kingston Utilities Meter Installation $200.00 *
ESA Inspection $274.00 [5]
TOTAL $800.00
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Energy Generation
[6]
Figure 7: Energy Generation Graph
0
20
40
60
80
100
120
140
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
MW
h's
Ge
ne
rate
d
Years of Operation
Energy Generation over System Life
126.8 MWh's
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Financial Return
[6]
Yearly Revenue: $2511
Breakeven Points: 6.0 Years
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Manufacturer’s Warranties
Component Manufacturer Length of Warranty
Aurora Inverter Power-One 10 years [7]
CS6P-250P PV Module Canadian Solar 10 years @ 90% performance
25 years @ 80% performance [8]
Racking Unirac 10 Year Structural Warranty
5 Year Finish Warranty
20 Year Manufacturing Warranty [9]
Please Refer to Appendix F for More Information
Further Recommendations
The proposed PV system is under 5kW's in size. The maximum allowable size under the MicroFIT program is 10kW's. This
offers the possibility to double the proposed system by installing a second array. Possible locations for such an array are:
The sloped roofs at the rear of the building. This location introduces interesting roof pitch and shadowing challenges, but offers the advantage of keeping a second PV array inconspicuous.
The flat roof near the front of the building. While this location would offer space enough for another 5kW of PV, a design team would first have to carefully inspect the roof to ensure it had sufficient structural support.
The front face of the building. This would be the most visible option, and has several disadvantages. The building roof has a very high pitch and little space for PV. In addition, these roofs are far from the meter base.
Figure 8: Recommended Locations for Additional Arrays
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Conclusion
The Leahurst Building is an excellent candidate for a PV system. The South-facing roof of the North wing offers ample
space, an ideal pitch and sufficient structural support for a mid-sized PV array. This location would situate the array out
of public view, preserving the heritage and historical character of the building. Most importantly, the proposed system
offers an attractive lifetime financial return of $35,140. This represents an investment rate of return of 15.8%, which is
substantially higher than most any other low-risk investment opportunities.
If this proposal meets with the client's approval, Solaris would begin by forwarding to his office an invoice for service.
The invoice would include the cost estimate detailed in this proposal, as well as additional information on project
deadlines and a work commencement date.
Solaris would once again like to thank the client for the opportunity to submit this proposal. PV will contribute an ever-
increasing percentage to Ontario's energy generation portfolio in the years to come. Mr. Paul Ayres is to be commended
for recognizing this change and seeking to develop his own solar project. It is the hope of this company to help realize
this vision, and transform the Leahurst Building into the premier PV showpiece of Ontario.
Figure 9: The Completed Leahurst Building PV Project
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References
[1] ClearSky Advisors Inc. (2011, Jul.). "Economic Impacts of the Solar PV Sector in Ontario 2008-2018". ClearSky Advisors Inc., ON, Canada. [Online]. Available: www.cansia.ca/sites/default/files/economic_impacts_of_the_solar_photovoltaic_sector_in_ontario_2008-2018_july_26_0.pdf
[2] [Online]. Available: www.theresourcestore.ca [18 November 2013]
[3] [Online]. Available: www.homedepot.ca [18 November 2013]
[4] [Online]. Available: www.midnightsolar.com [18 November 2013]
[5] [Online]. Available: www.esasafe.com/assets/files/xls/Fee-Cheat-Sheets-2013.xls [18 November 2013]
[6] [Online]. Available: www.retscreen.net/ang/version4.php [19 November 2013]
[7] [Online]. "Standard Product Warranty". Power-One. Phoenix, AZ. [Online document]. Available: http://www.power-
one.com/sites/power-one.com/files/documents/renewable-energy/warranty/standard_product_warranty.pdf
[8] [Online]. "Warranty and Insurance". Canadian Solar. Guelph, ON. [Online document]. Available:
http://www.canadiansolar.com/down/en/CS6P-P_en.pdf
[9] [Online]. "Limited Warranty on SOLARMOUNT-E Components". Unirac, Inc. Albuquerque, NM. [Online document].
Available: http://www.unirac.com/sites/default/files/solarmount-e-warranty.pdf
[10] [Online]. Available: http://stringsizer.power-one.com [19 November 2013]
[11] [Online]. "PVI-5000-TL General Specification". Power-One Inc. Camarillo, California. [Online document]. Available:
www.power-one.com/sites/power-one.com/files/documents/renewable-energy/datasheet/pvi-5000-6000-tldatasheetna.pdf
[12] [Online]. "CS6P Technical Specification". Canadian Solar. Guelph, ON. [Online document]. Available:
http://www.theresourcestore.ca/pdf/files/CS6P-P.pdf
[13][Online]. "SOLARMOUNT-E Technical Datasheets". Unirac, Inc. Albuquerque, NM. [Online document]. Available:
http://unirac.com/sites/default/files/smetechdatasheet_v4.pdf
[14] [Online]. "Standoffs and Flashings Installation Manual". Unirac, Inc. Albuquerque, NM. [Online document].
Available: http://unirac.com/sites/default/files/ii907_2.pdf
[15] [Online]. Available: http://unirac.com/flash/solarmount_e/index.html?format=lightbox [19 November 2013]
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Appendix A - Single Line Diagram
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Appendix B - Conductors
Figure 10: Disconnects, Inverter and Meter Enclosure
The chosen location for the DC and AC disconnects, inverter and utility meter minimizes conductor length while still
remaining hidden from public view. Additionally, they are situated in a location that will become partially shaded
throughout the day, reducing the danger of overheating.
Figure 11: Meter Base Hidden from Public View
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Figure 12: String Conductor Layout
The PV array consists of two strings of nine and ten modules. The modules of each string connect in series, terminating
through rubber gaskets to PVC junction boxes. Two pairs of MC4 extension cord then run through PVC conduits, down
the roof and side of the building, terminating at the first DC disconnect enclosure. The pair of string conductors are
connected to the input terminals of the first DC disconnect box, while the second pair continue through the conduit.
These conductors are connected to the input terminals of the second DC disconnect.
From the output terminals of the DC disconnects, two pairs of DC conductors are run to the input of the inverter. Within
the inverter, DC current is converted to AC current. AC conductors then bring the current from the inverter to the AC
Disconnect device. From there, current flows to the utility meter, where it is measured and distributed to the grid.
Figure 13: DC and AC Conductors in the Inverter
Conductor Specifics
Connection Points Current Conductor Length
Number of Conductors
Wire Gauge
Module to Module; String to PVC Junction Box
DC 10 Feet 10 10 AWG
PVC Junction Box to DC Disconnects
DC 50 Feet 4 10 AWG
DC Disconnects to Inverter DC 3-5 Feet 4 10 AWG
Inverter to AC Disconnect AC 2-4 Feet 3 6 AWG
AC Disconnect to Meter AC 2-4 feet 3 6 AWG
Figure 14: MC4 DC Conductor
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Appendix C - System Sizing
[10]
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Wire Sizing Calculations
Ampacity Calculations
Conductor Run Isc Isc x1.25
Temperature Correction
Greater than 3 Conductors
Non-Continuous Size (AWG)
Ampacity
(A)
Over
Current
(A)
Module to Module 8.87A 11.09A /0.67 = 16.55A NA /0.80 =20.69A 10 30 20
String to PVC Box 8.87A 11.09A /0.67 = 16.55A NA /0.80 =20.69A 10 30 20
PVC Box to DC Disconnects
8.87A 11.09A /0.67 = 16.55A /0.80 =20.69A
/0.80 = 25.86A 10 30 20
DC Disconnects to Inverter
8.87A 11.09A /0.67 = 16.55A /0.80 =20.69A
/0.80 = 25.86A 10 30 20
Inverter to AC Disconnect
23A
(Inv. Iac-max)
28.75A /0.67 = 42.91A /0.90 = 47.68A
/0.80 = 59.60A 6 65 50
AC Disconnect to Utility Meter
23A
(Inv. Iac-max)
28.75A /0.67 = 42.91A /0.90 = 47.68A
/0.80 = 59.60A 6 65 50
Voltage Drop Calculations
Conductor Run Actual Length
V(*) DCF
(Imp/Ampacity; Table D3 cont'd)
P Lt
(From Table D3)
L =
(Lt x P x DCF x (V/120))
Is Wire Acceptable?
Module to Module ≈ 2m 301V 8.30/30; 1.08 3% 15.5m 125.97m (**) Yes
String to PVC Box ≈ 2m 301V 8.30/30; 1.08 3% 15.5m 125.97m Yes
PVC Box to DC Disconnects
≈ 15m 301V 8.30/30; 1.08 3% 15.5m 125.97m Yes
DC Disconnects to Inverter
≈ 2m 301V 8.30/30; 1.08 3% 15.5m 125.97m Yes
Inverter to AC Disconnect
≈ 2m 240V 19.79/65; 1.08 3% 19.6m 127.01m Yes
AC Disconnect to Utility Meter
≈ 2m 240V 19.79/65; 1.08 3% 19.6m 127.01m Yes
(*) V = Vmp of module x number of modules in a string. (30.1Vmp x 10 modules = 301 V)
(**) Example Calculation: L = (15.5 x 3 x 1.08 x (301/120))= 125.97m
All wire type is T90.
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Max Power Calculations
Max Power Hot Max Power Cold
Hot temperature assumed to be 60 C.
Cold temperature assumed to be -25 C.
Pmax-hot =
Pmax + (ΔT-h x Pmax coef x Pmax)
250W + ((60-25) x (-0.43%/C) x 250W)
250W+(35 x (-0.43%/C) x 250W)
250W + (-15.05% x 250W)
250W + (-37.63W)
212.38W (per panel)
Pmax-cold =
Pmax + (ΔT-c x Pmax coef x Pmax)
250W + ((-25-25) x (-0.43%/C) x 250W)
250W+(-50 x (-0.43%/C) x 250W)
250W + (21.50% x 250W)
250W + (53.75W)
303.75W (per panel)
Max Power Hot for Array =
Pmax-hot *19 panels =
4035.22W (array)
Max Power Cold for Array =
Pmax-cold*19 panels =
5771.25W (array)
Bonding Method
The PV array will be bonded using grounding lugs screwed to the frame of each module. A 10 AWG copper grounding
conductor is run along the length of adjacent modules while attached to the grounding lugs. Rows of modules are
bonded together using the same hardware and method. Once every module has been bonded together, the copper
grounding conductor is run through a PVC junction box, down to the DC disconnects or inverter, where it is terminated
at a ground terminal block.
Figure 15: PV Grounding Lug
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Appendix D - Manufacturer's Datasheets
AURORA Inverter
Aurora Power-One 5000W
PVI-5000-TL
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[11]
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Canadian Solar 250W PV Module
[12]
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Unirac SOLARMOUNT-E Racking
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SOLARMOUNT-E Beam
[13]
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UNIRAC No-Calk Flashing
The Unirac SOLARMOUNT-E flashing assembly is a simple and reliable solution for affixing racking to the roof. The
flashing slips under existing roof shingles, and the standoff is secured to the rafters with two lag screws. To
accommodate the 56 required flashing assemblies, 112 roof penetrations are needed for the 3/8" lag screws.
Figure 16: Flashing and Roof Penetrations [14]
[14]
Figure 17: Flashing Assembly [15]
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DC Disconnect Enclosure DC Fuse
125 Amp Dc Disconnect (MNDC125)
Figure 18: DC Disconnect
[4]
600 Vdc at 20 Amps (MNEPV20-600)
Figure 19: DC Fuse
[4]
Electrical Utility Meter (Enclosure Only) AC Disconnect
MICROELECTRIC 100A Combo King Size Meter Socket Model: BE1-TCV | Store SKU: 1000423980
Figure 20: Electrical Utility Meter Enclosure
[3]
GE 50A, 240VAC Fusible Outdoor General-Duty Safety Switch
Figure 21: AC Disconnect
[3]
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Appendix E - RETScreen Analysis
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[6]
Lifetime Return on Investment: $35,140
Initial Investment: $15,080
Breakeven Point: 6.1 Years
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Appendix F - Warranty Information
Aurora Inverter
[7]
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Canadian Solar PV Module
[8]
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Unirac Racking
[9]
