3kw power inverters automatic protection against overload, over temperature and low/high battery conditions Two, three-prong grounded ac outlet Built-in cooling fan Power on/off switch Digital led display (input dc voltage or output wattage) Cordless remote control (optional) Specsification: Continued power 3000w Peak load power rate < 6000w No load current draw < 1.90a Input dc voltage range 11-15v / 22-30v Output voltage range 110-120vac/220-230vac Output frequency range 60 +/- 4hz , 50 +/- 4hz Max outer temperature < 65 c Max power efficiency >85% High voltage cut off level 15.5 +/- 1v, 30.5 +/- 1v Low voltage cut off level 10 +/- 0.5v, 20.5 +/- 0.5v Over-temperature protection: yes Short protect : yes Overload protect: yes Dimension (lxwxh) mm 501 x 230 x 155 Weight (kg) 8.00 Input voltage: dc 12v / dc 24v Dimension (lxwxh) mm 501 x 230 x 155 Weight (kg) 8.00 Pcs/ctn : 1/1