Output current 3,2 3,6 Amp (400 watt load) 40A replaceable fuse. 15 volts high input volt lock. Low input volt alarm 11.5 volts of continuous current.

Thus, to allow the efficiency of the inverter, typically 85, divide the figure by 0.85. Thus, the inverter calculator is for a load of 300W to 12 volts.300 12 0.85 29.4 Amps.

An inverter 1500W with a charge of 500 watts would be 50 (25) Amps, no 150 (75) Amps. The same inverter with a charge of 1200 watts throws 120 (60) Amps. How long does the battery last with a charge of 1000 watts?

If you maximize the inverter to 2000 watts, it is pulling 2000 watts 12 volts 166.6 amps DC per hour. If you use a 200 amps 12 volts battery, it would divide the battery by 200 amps 166.6 amps 1.2 hours running time.

400W 12V 33 Amplis, as you say. If your inverter is overloaded, then you have to blow up a fuse.