Can a 3 phase inverter convert 12V to 400V?

While it's certainly possible to have a three phase inverter that converts 12V to three phases of 400V, consider the power that your pump needs: P = U·I ~= 1 kW. Do to the way this universe works, you need that 1 kW to come from somewhere, in this case your battery.

How much power does a 3 phase inverter pull?

It will still not be cheap, but it might be cheapER. A motor at 2.4A per phase will pull about 2kW. Vevor sells VFD at 2.2kW, that takes 240VAC input for 3 phase out. One solution would be a bank of 12V batteries to feed a 12V inverter to 240VAC, then input to VFD.

Can a 3 phase inverter power a VFD?

The primary problem is the voltage; a 3 phase inverter requires a DC voltage that is 141% higher than the output AC voltage, so at a simple 12VDC input, the most you can get from it is 8.5VAC and that will not be enough to power up even the control boards of a modern VFD.

How do I get a 3 phase AC output?

For acquiring a 3 phase AC output from any single phase or a DC source we would require three fundamental circuit stages: A 3 phase driver power stage circuit. To learn how to match a solar panel with battery and inverter, you can read the following tutorial: Calculate solar Panels for Inverters

What is a single phase grid on inverter?

For single phase grid on inverter, this type of solar inverter converts direct current (DC) from solar panels into alternating current (AC) that matches the voltage, frequency, and phase of the electrical grid. It uses maximum power point tracking (MPPT) to optimize the energy harvest from solar panels.

Can a 12V inverter feed a VFD to a 240V DC converter?

Vevor sells VFD at 2.2kW, that takes 240VAC input for 3 phase out. One solution would be a bank of 12V batteries to feed a 12V inverter to 240VAC, then input to VFD. Another solution would be DC converter to raise 12V to 240VDC to feed VFD if accepts DC in.