The motor uses 3kW. It might need more when it works hard.
If you make an inverter that has a 12V input and a 3kW 230V output then it wastes about 450W making heat. The battery must supply 3450W.
The 12V battery must supply 3450W/12V= 287.5A. That is rediculous unless you are towing a trailer full of huge batteries in parallel.
It will take weeks to charge that many batteries.
Rediculous.
If you make an inverter that has a 12V input and a 3kW 230V output then it wastes about 450W making heat. The battery must supply 3450W.
The 12V battery must supply 3450W/12V= 287.5A. That is rediculous unless you are towing a trailer full of huge batteries in parallel.
It will take weeks to charge that many batteries.
Rediculous.