We bought a 12 solar panels (330 Watt) to power a 2.9 kW installation using pumps and motors. The installation was done single phase and now we realized we needed 3 phase as all the pumps and motors are 3 phase. The provider wants to sell 14 kW more arguing that the pumps need a tripe of the current to start and needs 2 more 6 kW inverters to split in 3 and transform to 3 phase. I thought a phase transformer could have done the tick but I guess that does not exist.
Thank you for any advice.