Industrial 1-5kW Hybrid Inverter Design

Budget: ₹12500 - ₹37500

I need a complete design package for a grid-tie hybrid solar inverter rated anywhere between 1 kW and 5 kW for continuous industrial duty. The unit must seamlessly blend three operating modes—solar, battery and grid—while prioritising solar power and automatically falling back on the grid when generation is low or demand is high.

Core requirements • Energy storage capability built around lithium-ion battery banks (48 V nominal is typical on our site, but confirm cell configuration and BMS integration with me). • Remote monitoring through Ethernet or Wi-Fi, pushing live data (current, voltage, power, SoC, fault codes) to a cloud dashboard or Modbus/TCP endpoint. • Grid power backup that complies with standard anti-islanding protections and can ride-through brief outages without dropping critical loads.

What I expect from you

1. Electrical architecture and block-level topology, including MPPT stage, bidirectional DC-DC for battery interface, and H-bridge or three-phase inverter bridge (we will finalise whether the output is single or three-phase once you review my site specs).
2. Complete schematic and PCB layout files (Altium preferred, Gerber + BOM mandatory).
3. Firmware source code for DSP/MCU (TI C2000, STM32, or your suggested controller) covering MPPT, battery management, grid-synchronised PWM, protection routines and data logging.
4. Thermal and efficiency simulations, plus EMC/EMI mitigation notes suitable for an industrial enclosure.
5. A concise commissioning guide and test plan so our in-house technicians can replicate your lab results.

Acceptance criteria • Stable 230 VAC output (±2 %) at 50 Hz while delivering 5 kW into a resistive load in grid-tie and islanded modes. • >95 % peak conversion efficiency at 3 kW, documented with test curves. • Less than 3 % THD on the AC output. • Seamless transfer (≤20 ms) between solar-battery and grid input during brownouts. • Remote dashboard shows real-time metrics and stores 30 days of history without packet loss.

I will provide my existing lithium-ion rack specifications and enclosure drawings once the project kicks off. Let me know which development tools and test equipment you plan to use and feel free to propose incremental milestones so we can review each stage before moving to hardware fabrication.