Q: What is the efficiency of a power inverter?
A: When it works the power inverter will consume a part of the input power. The output power will be lower than the input power. The efficiency of the power inverter is the ratio of output power and input power. If the input power is 100 watts (from DC power), and the output power is 80 watts (for AC power). Then the efficiency of the power inverter is 80%. When we use a power inverter, it is better not to power the device for more than 80% of the rated power, and not to be continuously used for a long time.

Q: Can I use the power inverter for my car when the engine is turned off?
A: Yes, when used for 300 watts load, the general car battery can provide power for approximately 25-55 minutes in the case of the engine being turned off. If the load is a laptop with 40 watts, the power time will be longer. The power inverter has an under-voltage warning and under-voltage protection circuit. If the battery voltage drops to 10 volts, the under-voltage protection circuit is activated, and the output voltage is cut off. It will prevent the battery voltage is too low and having a start accident in the car engine. If we prepare another battery and connected it to the car battery, then the working time of the power inverter can be doubled.

Q: What size of a power inverter do I need for my RV?
A: It depends on the actual load power of the RV. As to high-power electrical appliances such as air conditioners and refrigerators, the starting current is equivalent to 3-9 times the average working current, and then it is required to select an power inverter with higher power. Taking the 24V 3000W inverter as an example, if the sum of the rated powers of the loads to be used in the RV at the same time is no more than 2800W, the 3000W can guarantee a stable current. It should also be noted that to prolong the inverter's service life, do not operate it at full load for a long time, and do not use the inverter in a condition exceeding 80% of the rated power.

Q: Do power inverters drain car batteries?
A: If you leave your inverter turned on with no load attached, the average draw from your batteries will be 1 amp per hour; 24amps per day; or 168 amps over a week. The simplest solution to this is to just turn the inverter off when not required as the battery drain then becomes zero.

Q: Are power inverters safe?
A: While you might get tempted to power something really demanding with your car power inverter, chances are you might damage your car battery this way. While most probably you won't immediately ruin it to the ground, it will quickly degrade and lose capacity.

Q: What are the important things when using a power inverter?
A: The power inverter output voltage is 220V AC or 110V AC. When in a relatively small space and moveable state, people should pay special attention to it. It is best to place a power inverter in a safe place to prevent electric shock. When not in use, be sure to cut off its power. A power inverter cannot be placed in a warm air outlet or near the location or direct sunlight. Other objects cannot be placed on the power inverter or nearby. Don't put it in rain or sprinkled with water, mainly because of the power inverter is very afraid of the water, it may damage if water enters.