I have a Orion 2kw Inverter which is working for the last 15 years or so. 4 years ago, I installed a 5kw sungrow SH5K single phase hybrid inverter with 2 x 10kw Meritsun 48v 200AH batteries. the problem with this was when I use the 5kw air condition system which is a 3 phase, only 3kw was taken...