Ready-Made, Tested Pure Sine Wave Inverter Wanted

# Looking for a Ready-Made Pure Sine Wave Inverter Design

I am looking for an engineer or company that already has a **tested and working pure sine wave inverter design** available for sale or licensing.

I am **not looking to develop a new inverter from scratch**.

The design should preferably meet the following requirements:

* 12V, 36V, 24V and 48V DC input
* 120V / 220V AC output
* 50/60 Hz
* Low-frequency transformer based
* Pure sine wave output
* Approximately 1.5kW to 12kW continuous power
* MOSFET based H-bridge
* SPWM control
* Battery charger / AC charging preferred
* Automatic transfer between AC and inverter preferred
* Short-circuit protection
* Overload protection
* Battery under-voltage and over-voltage protection
* Over-temperature protection

The package should include:

* Complete schematic
* Editable PCB design files
* Gerber files
* BOM
* Firmware/source code
* Microcontroller programming files
* Transformer specifications
* Calibration instructions
* Test procedure
* Technical support during prototype testing

The design must already have been **built and tested on real hardware**.

Please provide:

1. Photos or videos of the working inverter.
2. Output waveform measurements.
3. Maximum tested load.
4. PCB photos.
5. Information about units already manufactured using this design.
6. Price for the complete design.
7. Details about commercial manufacturing rights.

I need the right to manufacture and sell products based on this design.

Please do not bid if you only offer PCB layout services or if the inverter has never been physically tested.