Sungrow is a Chinese inverter manufacturer that was established back in 1997 so has now been operating, as I write this for 22 years which is no mean feat in this industry. They have a good track record with their inverters and are our preferred Chinese brand of inverters as they are a solid performer which we have found to be very reliable. If cost is a concern for you when installing a solar PV system then this is a brand that will serve you well. There Crystal single-phase inverter that was redesigned recently, where they refitted the screen back on the inverter which was a welcome change we felt. Their Crystal single phase inverter range topped out at 5kW until recently but they have just released a new 8kW single phase unit in the range which should fit into the market nicely.