48V/220V Hybrid Solar Air Conditioner with MTTP PV tracking system, full DC control technology ensures high reliability and efficiency, wide voltage design, easy installation. If the power source is AC+DC, the system use DC as priority, when the DC power is not sufficient, the AC power helps, thus achieve continuously power supply. Meanwhile, you can choose battery back-up for night running. If the power source is only DC, no AC, the system will work off grid. Easy&quick installation, not require the inverter.