link to buy VFD Inverter : https://s.click.aliexpress.com/e/_DB6QuVN
link to documentation : https://drive.google.com/drive/folders/1XPhIdR0jsvzHuwW5PerSwfn4O-TVbxla?spm=a2g0s.imconversation.0.0.4c3b3e5fDV9GeK
link to buy AC 220V 4000W SCR Electronic Voltage Regulator : https://s.click.aliexpress.com/e/_DCVqAgt