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I need a complete, code-compliant design package for a 100 kW rooftop PV array on an office building in the United States. Because the system will be submitted for permits and utility interconnection here, proven US experience is essential—please be comfortable working with the latest NEC, local AHJ requirements, and typical utility interconnection rules. Project context • Building type: mid-sized commercial office. • Available infrastructure: ample, unobstructed roof area; no parking-lot or ground mounts planned. • Primary objective: strengthen the company’s environmental sustainability profile; cost savings are welcome but secondary. What I expect from your work 1. Optimal string and inverter sizing, shade and production analysis (Helioscope, PVsyst or similar). 2. Single-line diagrams, conduit/cable schedules, and protection calculations ready for a US PE stamp. 3. Roof layout with panel placement, structural load map, and attachment details suited to common US racking hardware. 4. Bill of materials listing major equipment (modules, inverters, racking, combiner boxes, monitoring). 5. Permit set formatted for AHJ submission, plus a utility interconnection package. 6. Brief narrative explaining design choices and projected annual generation. I will supply as-built roof drawings, utility bills, and load data once we start. Please share examples of previous US commercial designs of similar scale when you respond, along with the software you intend to use and your expected turnaround time.
Project ID: 40389423
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33 freelancers are bidding on average $491 USD for this job

Hello, As a highly skilled and experienced engineer, combined with my background in electrical engineering, I am perfectly suited for your project. My experience in renewable energy design is diverse and includes a number of similar projects, particularly commercial solar designs of a large scale like yours. I have a great understanding of the latest NEC standards, local AHJ requirements, as well as utility interconnection rules. This will ensure that your design package meets all necessary codes and regulations. I am confident that my skills in using Helioscope, PVsyst, AutoCAD alongside other software tools will enable me to deliver exactly what you need for your 100 kW rooftop PV array on your office building. Not only will I provide top-notch shade and production analyses and optimal sizing, but also single-line diagrams, conduit/cable schedules, and protection calculations ready for a US PE stamp. Moreover, I am thorough in my work and pay great attention to detail. Your project aims at strengthening the company’s environmental sustainability profile while ensuring cost savings are secondary. I understand the significance of this balance and will ensure that the design I provide reflects this appropriately. Given these factors, I humbly request you to consider my profile for this critical project. Thanks!
$750 USD in 4 days
7.6
7.6

Hi,I hope you are doing well. I am a freelance architect with a strong background in architecture and interior design. I offer a variety of services, including BIM engineering, Architectural Design, Interior design and 3D Ultra Realistic Visualization. I collaborate with a highly skilled team of experts to ensure that every project is executed to the highest standards, focusing on creating functional and aesthetically pleasing spaces that meet your needs. I am dedicated to keeping up with the latest trends in the industry, which helps me continually improve my skills and provide you with the best quality service at competitive prices. I would love the chance to discuss how I can help bring your vision to life. Thank you for considering my proposal!
$500 USD in 7 days
7.6
7.6

With over a decade of experience in the architectural and engineering fields, I have successfully completed numerous commercial projects within the United States, showcasing my comprehensive knowledge of local regulations and code compliance requirements, which is crucial for your 100 kW solar design. I understand the significance of precise documentation for permit submissions and utility interconnection, having gained expertise in preparing all the relevant documents and details needed for these processes. In terms of technical proficiency, I'm adept at using softwares like Helioscope, PVsyst alongside Autocad, 3dmax and Rhino that are essential for shade analysis, single-line diagrams and structurally sound panel placement according to common US racking hardware. You can also rely on me to provide a detailed bill of materials listing major equipment and a well-thought-out narrative explaining design choices such as string and inverter sizing.
$255 USD in 3 days
7.2
7.2

As an experienced and well-versed electrical engineer with a focus on solar design, I am confident in my ability to deliver high-quality work for your 100 kW rooftop PV array project. I have an excellent understanding of the National Electrical Code and local AHJ requirements and have successfully navigated utility interconnection rules in the United States on past projects. My proven track record in delivering code-compliant, robust designs with a strong attention to detail makes me a perfect candidate for your rooftop solar project. Moreover, my services extend beyond just meeting bare minimum expectations. I believe in fostering strong relationships with my clients and providing them with comprehensive explanations behind every design choice I make. To further ensure transparency, I promise you a detailed narrative explaining not only design choices but also projected annual generation. With me on board, you can expect your commercial 100 kW solar project to not merely meet regulatory standards but also help solidify your company's environmental sustainability profile while delivering significant cost-savings along the way. Let's make it happen!
$266 USD in 1 day
6.7
6.7

As an experienced engineer and designer with a strong background in renewable energy projects like yours, I'm confident that I can deliver the exceptional results you're seeking for your 100 kW solar design. Over the years, I've collaborated on unique, high-profile commercial projects that called for code-compliant designs and close coordination with local authorities. My experience working with NEC and AHJ requirements is unquestionable. Using reliable software like PVsyst and Helioscope, I'll ensure your solar system is optimally designed to maximize energy production given your available roof area and building type. My proficiency in designing single-line diagrams, conducting shade analysis, and accurately sizing string inverters will reassure you that every detail is accounted for. Additionally, my capability to generate comprehensive BOM data organized in a utility/permit-friendly manner ensures a streamlined approval process.
$251 USD in 1 day
5.8
5.8

Hi, how are you doing? I went through your project description and I can help you in your project. your project requirements perfectly match my expertise. We are a team of Electrical and Electronics engineers, we have successfully completed 1000+ Projects for multiple regular clients from OMAN, UK, USA, Australia, Canada, France, Germany, Lebanon and many other countries. We are providing our services in following areas: Antenna Design (CST, HFSS) Embedded C Programming. VHDL/Verilog, Quartus/Vivado, LabVIEW/ Multisim/PSPICE/VLSI MATLAB/SIMULINK Network Simulator NS2/NS3 Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC, STM32 and ESP32. IDEs like Keil MDK V5, ATmel studio and MPLab XC8. PLCs / SCADA PCB Designing Proteus, Eagle, KiCAD and Altium IOT Technologies like Ethernet, GSM GPRS. HTTP Restful APIs connection for IOT Communications. Also, we have good command over report writing, I can show you many samples of our previous reports. Kindly consider us for your project and text me so that we can further discuss specifically about your project's main goals and requirements.
$500 USD in 7 days
6.0
6.0

Hello, ✔ Which NEC edition and AHJ/utility rules should the 100 kW design follow? ✔ Do you have roof load limits and preferred racking/attachment system? I will deliver a code-compliant PV package with sizing, SLDs, layout, and permit/interconnection sets using PVsyst. I have US commercial rooftop PV experience ensuring PE-ready documentation. Let’s review your inputs to proceed. Best regards, Mohand
$500 USD in 7 days
4.9
4.9

Hi, I’m a multidisciplinary engineer focused on design + analysis, delivering production ready CAD and simulation-backed solutions. I work across mechanical and architectural scopes, with clear drawings, practical detailing, and fast communication. Feel free to check my profile for similar projects ,happy to review your scope and suggest the best next steps. G. Zaralı
$750 USD in 7 days
4.7
4.7

With more than a decade of experience in electrical engineering and extensive knowledge in solar panel design, I'm confident in providing you a top-notch package for your 100 kW solar project. I understand the crucial factors that go into rooftop PV arrays, including NEC codes, AHJ requirements, and utility interconnection rules. As an experienced professional who has successfully completed numerous code-compliant designs similar to yours across the US, I have perfected my skills on Helioscope and other relevant software like PVsyst necessary for shade and production analysis. Additionally, my familiarity with the latest US racking hardware will allow me to create a detailed roof layout with panel placement and structural load map specifically tailored to your office building. Having a strong background in design and engineering has also honed my ability to create comprehensive Bills of Materials, vital for any project. Best Regards Sumit
$256 USD in 1 day
4.4
4.4

Hi, we've been working with US solar companies since 2015. We're experts in C&I Designs, PV Permits, IC apps, up to PTO. We can work on your project and deliver the results you want!
$750 USD in 15 days
3.2
3.2

Hi, As you mention here, have to Design 100KW solar permit plan as per USA standard. I am B.Sc. Electrical Engineer and I have dedicated more than 16 years of experience & professional in this sector (solar drawing design in CAD). I am highly interested on this project. I understand that what you want. I hope you will massage me and discus about your important project. I am looking for a great relationship in future. Best and regards, Engr. Sadeque
$250 USD in 2 days
1.7
1.7

As a versatile developer, I know that my skills extend beyond just the software realm. In fact, I have a strong foundation in Electrical Engineering, which makes me uniquely suited to tackle this project with precision and depth. I am familiar with the NEC codes, local AHJ requirements, and utility interconnection rules that your 100 kW commercial solar design will mandate - all thanks to my vast experience working on multiple projects of similar scale in the United States. What you can expect from me is a design package that is optimized for peak performance and is ready to be submitted for permits and utility interconnection. When it comes to designing a solar array, knowing how to use software likeand Helioscope or PVsyst is crucial. Fortunately, boasting fluency in multiple languages like Python and JavaScript means I'm not only proficient with these software but can even make custom-built tools depending on your specific needs. My quick turnaround time combined with software proficiency accelerates our project timeline nicely. What sets me apart is my ability to offer creative solutions anchored in sustainability while considering cost-saving measures as secondary objectives in your rooftop PV array design. Combining ample unobstructed roof space and my familiarity with common US racking hardware, we'll create a comprehensive design that maintains the structural integrity while producing maximum energy. Let's actualize your ambition of strengthening your company's environmental sustainability – possible through hiring me!
$500 USD in 10 days
0.0
0.0

Hello, With over five years of experience in the field encompassing AutoCAD and Electrical Engineering, I am confident I possess the necessary skillset to successfully undertake your Commercial 100 kW Solar Design project. Having worked on numerous projects similar in scale and scope, including a recent 125 kW installation in California, I'm well-versed with the National Electrical Code (NEC), local AHJ requirements, and utility interconnection protocols critical to your project's success. Notably, my comprehensive understanding of PV array design from string sizing to structural considerations will be paramount for your rooftop installation. My dedication to efficiency resonates with what you expect from this project. With this in mind, I ensure that not only will I meet your requirements, creating optimal string and inverter sizing analysis using tools like Helioscope or PVsyst , but also deliver a high-quality design package ready for review by a US PE. Additionally, my ability to provide detailed single-line diagrams, conduit/cable schedules, protection calculations alongside a list of all major components will greatly facilitate the permitting process. My commitment to clear communication should also reassure you. Given my familiarity with the relevant US regulatory landscape, I understand what it takes to achieve compliance while keeping your project on time and on budget. I am committed to working closely with you throughout t Thanks!
$250 USD in 3 days
0.0
0.0

I have successfully delivered numerous commercial-scale PV designs for multi-story office buildings, recently completing a 120 kW flat-roof project that passed municipal permit review on the first submission without corrections. Your 100 kW rooftop requirement is a perfect fit for my expertise in optimizing energy density while strictly adhering to NEC 2023 standards and local fire setback codes. I understand that for a commercial office environment, minimizing structural impact and maximizing ROI through precise shade modeling and efficient electrical routing is the top priority for both the owner and the contractor. My technical approach begins with high-resolution site analysis using HelioScope or PVSyst to generate 8760 hourly production data, ensuring we accurately account for every rooftop HVAC unit and parapet wall shadow. I will develop a comprehensive AutoCAD construction set including a detailed site plan, optimized stringing layouts for high-wattage mono-PERC modules, and a full single-line diagram (SLD) featuring integrated Rapid Shutdown (RSD) solutions. To ensure full code compliance, I will perform all necessary voltage drop calculations, conductor sizing, and verify that the chosen racking system meets specific local wind and snow load requirements, providing you with a permit-ready package that streamlines the entire installation phase. Do you already have the structural roof report or a preferred racking and inverter manufacturer in mind for this specific installation? I’d also like to know if there are specific interconnection requirements or net-metering constraints from the utility provider that we should integrate into the electrical schematics early on. Let’s have a quick chat to align on the project timeline and any specific equipment preferences you have—I’m available for a brief call if you'd like to discuss the technical specifics in more detail.
$557 USD in 21 days
0.0
0.0

Dear Client, I work with US-based commercial solar projects in coordination with licensed engineers to deliver complete permit and interconnection packages. I’m familiar with NEC (latest edition), utility requirements, and AHJ expectations for commercial rooftop systems. I focus on producing clean, coordinated sets that engineers can stamp and jurisdictions can approve without back-and-forth. I’d be glad to share relevant US commercial project examples and outline a timeline once I review your documents. Typically, initial design can be turned around quickly with a structured submission set following shortly after. Let’s connect and get this moving. Sincerely, William
$500 USD in 7 days
0.0
0.0

3,000 ~ 8,000 I’m Clifford, a project engineer with Land Development Engineering. I reviewed your 100 kW rooftop PV requirements—this is work we handle regularly. I can deliver a complete, code-compliant package including system sizing (Helioscope/PVsyst), single-line diagrams, roof layout with structural considerations, BOM, and a permit/interconnection-ready set aligned with NEC and AHJ requirements. My focus is a clean, efficient design that passes review without delays and stays cost-effective. Once you share the roof drawings and utility data, I can get started right away and outline a quick turnaround. Best regards, Clifford Paul Project Engineer Land Development Engineering
$250 USD in 10 days
0.0
0.0

Commercial 100 kW Solar PV design—permit-ready for a US mid-sized office roof. I’m an Electrical Engineer focused on code-compliant power system design and engineering documentation, comfortable navigating the latest NEC, typical utility interconnection requirements, and AHJ-driven edits. You’ll get an end-to-end, stampable package sized for rooftop constraints and structural realities. I will perform stringing and inverter sizing with PV production modeling (Helioscope or PVsyst), including shade/soiling assumptions and energy yield for your utility submission narrative. Protection and equipment specs will be calculated for correct conductor sizing, OCPD/combiner configuration, and fault/arc considerations per US standards. Deliverables include: roof layout with panel placement, structural load map, and attachment details compatible with common US racking; single-line diagrams; conduit/cable schedules; bill of materials (modules, inverters, racking, combiner boxes, monitoring); and a complete permit/interconnection set suitable for PE stamping. Send your as-builts, load data, and utility tariff info to start.
$500 USD in 7 days
0.0
0.0

You may be concerned about designs that “meet NEC on paper” yet get delayed by AHJ or utility review; for 100 kW rooftop PV, that’s exactly what we avoid. I’ll deliver a complete, permit-ready, code-compliant design package tailored for US office rooftops and typical utility interconnection. System studies (Helioscope/PVsyst) will confirm string/inverter sizing, production estimates, and shade impacts, then translate into clean single-line, protection, conduit/cable schedules, and equipment coordination suitable for a PE stamp. Roof deliverables include a panel layout, structural load map, and attachment details aligned with common US racking hardware, plus a major bill of materials (modules, inverters, racking, combiners, monitoring). I’ll also prepare a formal AHJ permit set and a utility interconnection packet, including the narrative that explains design choices and projected annual generation. To move fast, you provide your as-builts, utility bills, and electrical/load data; turnaround is typically 2–3 weeks after receipt. Share your target state/utility and roof photos for a quick scope confirmation—send that, and we’ll start.
$500 USD in 7 days
0.0
0.0

Commercial 100 kW rooftop solar design package—permit-ready for US review and utility interconnection. I’ll deliver a complete, NEC-compliant engineering set for a mid-sized office building, including string/inverter optimization and design documentation suitable for AHJ submission and PE stamp. Using Helioscope or PVsyst (and consistent modeling inputs from your utility bills/load data), I’ll size strings, evaluate shade/production, and select equipment that supports rapid interconnection while maximizing annual kWh. I’ll also provide single-line diagrams, conduit/cable schedules, voltage drop and protection calculations (overcurrent, DC/AC disconnects, grounding/bonding, surge where required). I’ll produce a coordinated roof plan with panel layout, structural load map, and attachment details aligned to common US racking hardware, plus a bill of materials covering modules, inverters, combiners, racking, monitoring, and balance-of-system. A permit set narrative will explain design choices, and I’ll assemble the utility interconnection package. Share your roof drawings and site constraints; then I’ll confirm software workflow and turnaround.
$500 USD in 7 days
0.0
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We can achieve a code-compliant 100 kW rooftop PV design package with a permitting-ready, utility-interconnection approach if we start by modeling your roof, production, and compliance constraints together. Using the latest NEC and typical US AHJ expectations, I’ll produce an engineering set that supports review, revisions, and fast utility progress. I’ll run shade and performance studies (Helioscope or PVsyst) to optimize stringing and inverter sizing for your unobstructed roof. Then we translate results into single-line diagrams, protection calculations, conduit/cable schedules, and a complete bill of materials (modules, inverters, racking, combiners, monitoring). For the roof, I’ll deliver a clear panel layout plus structural load mapping and attachment details aligned with common US racking hardware. Package will include AHJ-formatted permit drawings and a utility interconnection submission set, with a concise narrative and projected annual generation. Share your as-built roof drawings, utility bills, and load data; I’ll confirm assumptions within 48 hours.
$500 USD in 7 days
0.0
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Gilbert, United States
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