Making 5KW transformer for sine inverter

Making 5KW transformer for sine inverter

I am building a sine inverter 5KW-48V, First, I need to build the transformer, Transformer must be big enough. I use 16 Kg toroidal iron core, Copper wire for 220V is 3.14mm2, Copper wire for primary is 12mm2. Because I use EGS002 module. I need a 28V for pre and 220V secondary. Once completed, the transformer weighs 20 Kg.

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All my projects are free, I design them on EAGLE 6.0. I uploaded it to Google drive. You need to use a web browser to download the file and open the file with winrar software (extract) on the PC. Open schematic file (.SCH) and PCB file (.BRD) with EAGLE software.
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#Inverter
#12Vto220V
#5000W