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I have an existing three-phase hybrid system with 3 × Sunsynk SYNK‑12K‑SG04LP3 inverters (36 kW total), ~44.55 kWp PV DC-connected, each paired with a 14.2 kWh LiFePO4 battery bank. I want to upgrade by adding ~32 kWp PV and ~45 kWh battery using a Deye three-phase 20 kW low-voltage inverter, AC-coupled—without tying the new batteries to the Sunsynks. Scope of Work: - Confirm feasibility of AC-coupling the Deye inverter to the Sunsynks (GEN/AUX vs load bus) while addressing GEN port limits (~12–15 kW). - Recommend optimal connection setup, CT placement for zero-export, and frequency-shift curtailment configuration. - Provide single-line/basic wiring diagrams. - Explain power flow, off-grid behavior, anti-islanding measures, and grid-forming conflict avoidance. - Recommend settings for both Sunsynk and Deye inverters. - Deliver a brief Bill of Materials (BOM) with specification links. - Suggest alternatives if AC coupling is not ideal. Deliverables: - PDF report with findings and recommendations. - Single-line/basic wiring diagrams. - BOM with specification links. - Settings sheet for both inverters. - Up to two revisions based on feedback. Ideal Skills and Experience: - Expertise in solar PV design and hybrid inverters (Sunsynk/Deye). - Proven experience with AC coupling setups. - Background in electrical engineering and familiarity with tools like PVsyst/Helioscope/Aurora (optional). Budget: $150 USD maximum. Timeline: 2–7 days.
Projekt-ID: 40071681
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24 Freelancer bieten im Durchschnitt $130 USD für diesen Auftrag

Dear Client, my name is Marko and I am excited about the opportunity to assist you with upgrading your solar PV system. Having worked extensively with PCB and firmware development, I have an intimate understanding of power supply circuits and multilayer designs, making me highly suited for the task at hand. With your existing Sunsynk and Deye inverters, my experience in successful AC coupling setups will prove invaluable. I'm well versed in the technical intricacies of hybrid inverters like Sunsynk & Deye. My background in electrical engineering and experience in solar PV design enables me to dissect complex scenarios and make insightful recommendations, as required by your project. Moreover, should AC coupling prove to be unfeasible for any reason, I am capable of offering alternative solutions, ensuring a comprehensive approach. With a commitment to detail and a meticulous working style, I promise an error-free provision of single-line/basic wiring diagrams, BOM with specification links, and settings sheet for both inverters. You can expect a thorough PDF report with my findings and recommendations regarding the optimal connection setup, CT placement for zero-export, frequency-shift curtailment configuration, power flow, off-grid behavior, anti-islanding measures, and grid-forming conflict avoidance. I look forward to delivering a job well done!
$113 USD in 7 Tagen
6,6
6,6

As an experienced and versatile electrical engineer with a specialization in circuit design and electronics, I strongly believe I'm the ideal choice for your technical consultation project. With my in-depth knowledge and 8 years of experience, I've developed a deep understanding of solar PV design, which includes hybrid inverters like Sunsynk and Deye - the specific expertise your project demands. A major aspect of your project involves AC-coupling, and I'm glad to note that I have proven experience with AC coupling setups. Additionally, my expertise extends to dealing with power flow, off-grid behavior, anti-islanding measures, and conflicts avoidance - key areas that will play a role in the successful completion of this project. In conclusion, by choosing me for this project, you'll be ensuring a deliverable that combines technical excellence with value for money; a result as efficient as it is effective in meeting your unique requirement. I appreciate your consideration and look forward to lending my expertise to bring your upgrade vision for your hybrid system to life. Thank you.
$120 USD in 1 Tag
5,7
5,7

Hi, I'm an electrical designer with over three years of experience in hybrid photovoltaic systems. I can help you integrate the new Deye inverter with your existing Sunsynk system, ensuring compatibility and proper pairing. I can provide targeted technical support for a safe and efficient upgrade of your system. Let me know.
$150 USD in 7 Tagen
4,6
4,6

Hello! With a deep understanding of hybrid systems and expertise in solar PV design, we are prepared to seamlessly integrate a Deye three-phase inverter with your existing three Sunsynk inverters. Our proven track record in AC-coupling setups ensures a smooth transition while maximizing efficiency. Our proposed solutions include confirming the feasibility of AC-coupling, optimal connection setups, precise CT placement for zero-export, and detailed single-line diagrams. We will also recommend bespoke settings for both Sunsynk and Deye inverters, ensuring seamless integration and performance optimization. Let's embark on this project together to enhance your system's capacity and efficiency. When can we discuss details further?
$75 USD in 3 Tagen
4,3
4,3

Thank you for sharing this opportunity, I can provide a thorough feasibility assessment and detailed recommendations for AC-coupling your new Deye inverter to the existing Sunsynk hybrid system. I will evaluate GEN/AUX versus load bus connections, CT placement for zero-export, frequency-shift curtailment, and anti-islanding/grid-forming interactions to ensure safe and efficient operation. Deliverables will include clear single-line wiring diagrams, an easy-to-follow BOM with specification links, optimal inverter settings for both Sunsynk and Deye units, and a concise PDF report explaining power flow, off-grid behavior, and potential alternatives if AC coupling is not ideal. Up to two revisions will be included for full confidence in implementation.
$100 USD in 2 Tagen
4,0
4,0

I am PH.D writer 12+ years, And would have no problem providing you with the HIGH-Quality work you need. All my work is 100% my own and never Copied, Spun or Plagiarized, so you won’t have to worry about that at all. My three core values are EFFICIENCY, QUALITY, and EXPERTISE. I will deliver this work within the stipulated DEADLINE and a guarantee of NON-PLAGIARIZED work. Hire me, and you will get value for your money. Thank you
$75 USD in 1 Tag
3,7
3,7

As an electrical engineer with a vast experience in circuit design and electrical engineering, I am confident that I can offer unparalleled insights and value to your project. I have succesfully dealt with similar AC-coupling setups in the past, making me well-versed in dealing with issues surrounding GEN port limits and recommending optimal connection setups for zero-export and frequency-shift curtailment configurations. Understanding power flow, off-grid behavior, anti-islanding measures and grid-forming conflict avoidance are some facets of your project that I not only comprehend but excel at. My knack in using tools like PVsyst/Helioscope/Aurora (optional) is also an added advantage as it makes complex tasks appear more manageable.I can assure you the deliverables will be top-notch including PDF report with findings and recommendations, Single-line/basic wiring diagrams, BOM with specification links, Settings sheet for both inverters.
$75,99 USD in 1 Tag
3,2
3,2

Having extensively worked with both Sunsynk and Deye inverters, I bring the perfect blend of experience and expertise necessary to undertake your project. My in-depth knowledge in circuit design, electrical engineering, electronics, and technical writing uniquely positions me to navigate the intricacies of your AC-coupling challenge. Moreover, my proficiency with leading design and engineering software such as SolidWorks, AutoCAD, Aurora (optional), and PVsyst/Helioscope gives me a clear edge when it comes to crafting explicit single-line/basic wiring diagrams, power-flow explanations, and detailed BOMs that you require. My pricing is extremely competitive at $150 USD which falls perfectly within your budget range. I promise quick turnaround times without ever compromising on quality. Even after delivering all the required parameters—PDF report with my findings and recommendations, single-line/basic wiring diagrams, BOM with specs links, settings sheets for both inverters—I'm ready to offer free post-completion support and keep lifetime backups of all files for your future reference. Your project vision deserves a pragmatic yet innovative approach—a balance I assure to maintain throughout our collaboration. Thank you for considering my services; I can’t wait to get started!
$75 USD in 1 Tag
4,3
4,3

Hi there, I’m an electrical/solar systems engineer with hands-on experience designing and reviewing hybrid and AC-coupled PV systems. I can assess the feasibility of your proposed AC-coupled expansion, recommend the safest and most efficient connection strategy, define CT placement and control settings, and clearly explain power flow and off-grid behavior. I’ll deliver clean single-line diagrams, inverter settings, and a concise BOM, and suggest practical alternatives if AC coupling proves limiting. I work quickly, document decisions clearly, and can complete this within your 2–7 day timeline. Looking forward to working on this. Cheers, Michael.
$100 USD in 6 Tagen
2,5
2,5

Hello Arinda F., We would like to grab this opportunity and will work till you get 100% satisfied with our work. We are an expert team which have many years of experience on Engineering, Electronics, Technical Writing, Electrical Engineering, Circuit Design Please come over chat and discuss your requirement in a detailed way. Thank You
$110 USD in 7 Tagen
0,0
0,0

I can support this upgrade by carefully analysing how to AC-couple the Deye 20 kW three-phase inverter into your existing Sunsynk-based hybrid system without creating control conflicts or export issues. I have hands-on experience with Sunsynk and Deye hybrids in mixed AC/DC-coupled architectures and understand the practical limits of GEN/AUX ports, load-bus coupling, and CT-based zero-export schemes. I will clearly explain feasible connection options, recommend the safest and most stable topology, and document inverter settings to avoid grid-forming clashes, frequency-shift issues, or unintended backfeeding. My deliverables will be concise, technically sound, and focused on real-world operation, including off-grid behavior and curtailment logic.
$150 USD in 3 Tagen
0,0
0,0

Your system expansion is achievable, but it needs careful design to avoid overloading GEN ports and to ensure correct power flow control between the Sunsynk cluster and the Deye inverter. I have designed and reviewed AC-coupled hybrid systems where independent battery stacks are intentionally isolated, and I can guide you through CT placement, zero-export enforcement, and inverter parameter alignment. I will provide clean single-line diagrams, recommended settings for both platforms, and a clear explanation of how the system behaves during grid loss, PV surplus, and battery charging. If AC coupling proves suboptimal, I will also outline practical alternatives so you can make an informed decision.
$150 USD in 3 Tagen
0,0
0,0

I specialise in complex hybrid PV systems that mix multiple inverter brands and coupling methods. For your Sunsynk + Deye upgrade, I will evaluate GEN/AUX versus load-bus coupling, confirm compliance with inverter limits, and ensure stable operation under both grid-connected and islanded modes. My approach prioritises preventing grid-forming conflicts, managing frequency-based curtailment correctly, and maintaining strict zero-export control. You’ll receive a clear PDF report, wiring diagrams you can hand directly to an installer, and a concise settings sheet that explains not just what to configure, but why each setting matters for long-term reliability.
$150 USD in 3 Tagen
0,0
0,0

I can deliver a practical, installer-ready design review for AC-coupling a Deye 20 kW inverter into your existing three-phase Sunsynk system. I have worked with Sunsynk and Deye equipment in real installations and understand their quirks, especially around CT logic, frequency shifting, and auxiliary port limitations. I will map out power flows step by step, including off-grid scenarios, anti-islanding behavior, and battery isolation. My documentation is written for clarity, so you’ll be able to validate the design yourself or discuss it confidently with your electrician or EPC.
$150 USD in 3 Tagen
0,0
0,0

This is exactly the type of hybrid-system integration work I handle: expanding capacity while keeping battery systems electrically independent and operationally stable. I will assess feasibility, recommend the most robust AC-coupling point, and define inverter settings that ensure smooth interaction between Sunsynk and Deye units. My deliverables will include clear diagrams, a focused BOM with links, and a settings checklist that minimises trial-and-error during commissioning. If AC coupling introduces unnecessary complexity or constraints, I will propose technically sound alternatives so you can choose the best long-term solution rather than forcing a marginal design.
$150 USD in 3 Tagen
0,0
0,0

Hello, I work on hybrid, grid-forming PV systems and I’ll be direct: the full scope you listed represents a complete engineering design package, not a quick consultation. Delivering all items properly cannot be done at senior level within a $150 budget. That said, I can provide a focused Phase 1 technical assessment that gives you a clear, defensible architecture decision before you commit hardware or wiring. What I will deliver within $150 (Phase 1): Feasibility verdict for AC-coupling a Deye 3-phase inverter into a 3× Sunsynk grid-forming system Recommendation of the correct coupling point (GEN/AUX vs load bus), including GEN port limits Identification of unsafe or unstable configurations (backfeeding, inverter fighting) CT placement strategy for zero-export Recommended frequency-shift / curtailment logic Explanation of off-grid behavior and power flow boundaries One clean high-level single-line diagram Concise PDF report with engineering rationale One revision included Explicitly excluded at this budget: Detailed wiring drawings, full BOM with procurement links, commissioning-level settings sheets. These belong to a Phase 2 design package. Delivery in 2–3 days after receiving basic system information. If you want generic confirmation, I’m not the right fit. If you want a clear engineering position you can rely on, this Phase 1 delivers that. Regards, Khadimou
$150 USD in 3 Tagen
0,0
0,0

Coming from a background in electrical engineering and equipped with an extensive knowledge in solar PV design and hybrid inverters (specifically Sunsynk/Deye), I believe that my skill set is perfectly aligned with your project needs. With me, you'll be getting an expert who has a proven track record of working on complex AC-coupling setups similar to what you require in your three-phase hybrid system. My experience with tools like PVsyst, Helioscope, and Aurora could be another asset in analyzing the feasibility of connecting the Deye inverter to the Sunsynks and suggesting optimal connection setup. I am well-versed in preparing comprehensive technical reports and can provide detailed single-line/basic wiring diagrams as part of the deliverables. Choosing me for this task would mean access to an engineer who values clarity, communication, and efficiency. Meeting your timeline of 2–7 days within your budget of $150 USD while delivering quality work wouldn't be a problem for me. I'm confident that at the end of our collaboration, you'll have a system that is not only functional but truly optimized for maximum performance and efficiency. Let's get started on upgrading your system together!
$150 USD in 3 Tagen
0,0
0,0

Hello, We are EPC in solar energy. We can help you design AC couple system using Deye/Sunsynk, create Single Line Diagram, BoM and PVSyst simulation. Do you have existing single line diagram? Thank you
$145 USD in 7 Tagen
0,0
0,0

Hello, > I’m Engr. Md. Rifat Ahmed, a solar and substation engineering consultant with 7+ years of experience and 300+ completed solar projects. I specialize in hybrid PV systems, lithium-ion battery integration, and inverter synchronization. > > I’ve worked extensively with Sunsynk and Deye inverters, and I can deliver: > - Feasibility analysis for AC-coupling > - GEN/AUX port load balancing > - CT placement and zero-export setup > - Frequency-shift curtailment configuration > - Single-line wiring diagrams > - BOM with spec links > - Recommended inverter settings > - PDF report + 2 revisions > > Tools I use: Helioscope, AutoCAD, PVSyst (basic), Excel. > I’m confident I can deliver within 2–5 days and stay within your $150 budget. > > Looking forward to collaborating! > — Engr. Md. Rifat Ahmed
$120 USD in 3 Tagen
0,0
0,0

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