6 tips on How to choose a car inverter?

Many  friends are very familiar with the car inverter, which is our driving equipment necessary. Of course, there are many novice friends do not understand the use of car inverter, in fact, car inverter is a direct current (DC) into AC (AC) device. There are many types of inverters on the market, how to choose? We share my experience today and hope to help you.

1. You have to know how many of your  car battery voltage, the general use of 12-volt battery in car, the use of diesel engines (including trucks) such as buses, trucks and most use 24-volt battery, a few still use 12-volt battery. Each inverter has access to the DC voltage value, requiring the choice of battery voltage must be consistent with the inverter DC input voltage. 12V battery must choose 12V inverter.
2. We have to understand the battery capacity, the general battery printed with a lot of letters and numbers, as long as the words to find XXAH can know that this is a large capacity of the battery. First say the meaning of AH, A on behalf of amps, the current unit, H on behalf of the hour. The two letters together mean “Amper hours”, referred to as “Anshi”, that is, in an hour’s time how many amps can continue to output the current. The preceding XX is usually two numbers, the number of amps. For example, 45AH on behalf of this battery can be in an hour of time output (12 volts) 45 amps of current. As for the battery can be output power, we use 12 volts multiplied by 45 amps, 540 watts, which is the battery output power (theoretical). General car used in the car; under normal circumstances, the cylinder volume of 1.3 liters below the small car equipped with a 40-45 security battery, 1.6-2.0 liters of medium-sized car is equipped with 50-60 An hour battery, 2.2 L above the large car is equipped with a 60-80 an hour battery. Off-road vehicles, multi-purpose vehicles equipped with the battery than the same size of the car’s battery capacity to be larger.
3. We have to know the battery capacity of our own cars, how to equip the battery with the appropriate inverter? If the battery size is 12 volts 50 amps, we multiply by 12 V by 50 amps, and the output power of the battery is 600 watts. If the efficiency of the inverter is 90%, then we multiply 90% by 600 watts to get 540 watts. It means that your battery can drive an inverter with an output power of up to 540 watts.
   Of course, you can also take a “one step” type of procurement approach, that is, regardless of the current car battery specifications, and buy an output power of 800 watts of the inverter. Then, in the immediate use of this battery within the allowable range, and so on for the future after a larger car and then full power use. Finally, the power requirements of the inverter is not high, for example, 100 watts is enough, then you can buy a low-power inverter. In addition, in determining the power of the inverter, there is an important principle, that is, when using the inverter, do not run for long-term operation, otherwise it will greatly shorten the life of the inverter, the inverter failure rate will be significant rise. We strongly recommend that the user, preferably not exceeding the rated power of 85% of the state using the inverter
4. We have to know the power of our own appliances; usually about 50W laptop; inverter output power must be greater than the power of the electrical use, especially for the start of the power of electrical appliances, such as refrigerators, air conditioners, electric drill, fans, etc. Big margin (usually about 2 times).
5. Car inverter is a work in high current, high frequency environment power products, the potential failure rate is quite high. Therefore, consumers must be careful when buying. First, the inverter output waveform must be better than the quasi-sine wave (modified wave); Secondly, the inverter should have a complete circuit protection; third, manufacturers have a good after-sales service commitment; Fourth, the circuit and the product after a period of time test.
   
6. From the car cigarette lighter socket to take power, the inverter should be able to drive power of about 200W (general car cigarette lighter fuse 15A) of the electrical appliances. But there are customers to reflect, then P4 laptop a few minutes later, the inverter is automatically power off and alarm. We know that P4 laptop power consumption is about 90 watts or so, is higher. As some models in the battery from the battery to the cigarette lighter socket on the circuit does not meet the provisions of the wire and cigarette lighter socket, the current in the circuit when the increase in the loss of large, so that the voltage to the inverter dropped sharply The undervoltage protection circuit operates at a critical point of 10 volts, causing the inverter to stop supplying power. In order to solve this problem and to ensure the safe, reliable use of the inverter in the future, it is recommended that the user replace the wire of the circuit with a high quality line with a copper core cross section of 2.5 mm2 or more and replace the cigarette Socket.