The Thunder 2000W Pure Sine Wave Inverter is conveniently designed with the addition of an automatic transfer switch to allow a seamless transition from DC input to 240V mains power and vice versa. This allows you the flexibility of using DC power when on the road or staying off the grid or utilising 240V power while staying at powered sites without having to manually switch between input modes. The switch does this by sensing when AC power going into the back of the unit’s AC terminals (shown to the right). The DC input will be bypassed and cut off to ensure no current draw from the DC battery. This then prompts the 240V AC outlets at the front and the 3 AC terminals at the back to become operational. When using DC input only the 2 front power points become active – NOT the rear power point. This process happens in 0.5 seconds to ensure there is no disruption to powering the essentials in your caravan or motorhome. The 2.4 inch LCD screen displays the AC input mode on the top left corner and will display an input of 0V, 0A and 0W to allow complete visibility of the unit.
This occurs when an appliance draws capacity greater than the inverter can provide. Output AC power will be stopped. This protection state will need to be manually reset by removing the load, turning off the switch and then turning on the unit to be used again.
Over Temperature Protection:
If the internal inverter temperature goes above 60°C, the output will be stopped and will need to be manually reset. If this occurs remove the load, power down the device and inverter and leave the unit to cool down. Check the operation of the cooling fans and whether they are blocked or not by -dust or debris. Then turn the switch back on to begin using the inverter again.
Low voltage protection:
If the source battery level falls below 11.5V, the unit will emit low voltage warnings. If the source battery voltage falls below 11 V, output will be stopped and the unit will need to be manually reset by removing the load, turning off the switch and then turning on the switch again. Continued operation of the inverter will only occur if the source battery voltage rises above 11.5V.
Safety Note: As the unit uses 240V power, it must be wired by a licensed auto electrician.