Last time we talked about taking into account the conversion efficiency of the inverter, circuit losses, and protecting the inverter from voltage spikes and surges. The rated power of the inverter we choose needs to reach about 1.4 times the total power of all the loaded appliances.
For example, the total power of a family’s load appliances is 1000W, then you need to choose a 1400W inverter.
Of course, this 1.4 times is only for ordinary load appliances. If the home has air conditioning, water pumps and other inductive appliances, then the inverter should choose more power.
Because the peak power of inductive appliances at start is very large, often 2-5 times the rated power. Take the middle value 3 times, is the power of the inverter.
5 LED lights :5 x 20W = 100W
1 LCD TV :120W
1 laptop :50W
2 phone chargers :2 15W = 30W
1 air conditioner: 1000W
Calculate the total fixed power (W) of all appliances.
Inverter of appropriate size = (100W+120W+50W+30W) *1.4+1000W*3=3420W