Residential Grid-Hybrid Inverter Design
Budget: ₹12,500 – ₹37,500 INR
I need a full engineering design for a residential-scale hybrid inverter that can seamlessly switch between my rooftop solar array, a lithium battery bank and the utility grid. The unit must accept solar DC input yet always remain grid-interactive so excess production is exported and the batteries are charged intelligently when tariffs are low.
Key goals include 3–5 kW continuous power, true sine-wave output, high conversion efficiency, islanding protection that complies with typical residential standards (IEEE 1547 or equivalent) and a user-friendly monitoring interface (Wi-Fi or RS-485 preferred). Because I will integrate it with grid power, the control logic has to prioritise self-consumption while still allowing programmed export limits.
Please base the topology on readily available power stages (e.g., SPWM full-bridge or LLC plus high-frequency transformer if you think that’s more efficient) and specify safety-certified components wherever possible. I am open to SiC or GaN devices if that improves thermal performance without driving costs beyond reason.
Deliverables I expect:
• Complete circuit schematic and functional block diagram
• PCB layout files and ready-to-manufacture Gerbers
• Detailed bill of materials with part numbers and sources
• Firmware source or control algorithm flowchart for the DSP/MCU you recommend
• Brief test plan outlining how I should verify efficiency, protections and grid-sync operation
I will prototype locally, so clarity in documentation is crucial. If you have recent experience designing residential hybrid inverters or similar power-electronics projects, let me know the standards you designed to and the tools (Altium, KiCad, MATLAB/Simulink, etc.) you typically use.
Key goals include 3–5 kW continuous power, true sine-wave output, high conversion efficiency, islanding protection that complies with typical residential standards (IEEE 1547 or equivalent) and a user-friendly monitoring interface (Wi-Fi or RS-485 preferred). Because I will integrate it with grid power, the control logic has to prioritise self-consumption while still allowing programmed export limits.
Please base the topology on readily available power stages (e.g., SPWM full-bridge or LLC plus high-frequency transformer if you think that’s more efficient) and specify safety-certified components wherever possible. I am open to SiC or GaN devices if that improves thermal performance without driving costs beyond reason.
Deliverables I expect:
• Complete circuit schematic and functional block diagram
• PCB layout files and ready-to-manufacture Gerbers
• Detailed bill of materials with part numbers and sources
• Firmware source or control algorithm flowchart for the DSP/MCU you recommend
• Brief test plan outlining how I should verify efficiency, protections and grid-sync operation
I will prototype locally, so clarity in documentation is crucial. If you have recent experience designing residential hybrid inverters or similar power-electronics projects, let me know the standards you designed to and the tools (Altium, KiCad, MATLAB/Simulink, etc.) you typically use.