A power inverter is a equipment capable of converting a direct voltage from batteries to alternating voltage 220V, same as we have in a domestic installation.
With a power inverter we can operate devices that operate at 220V in places where there is no mains voltage.
What inverter do I need?
We must keep in mind the following factors before choosing an inverter:
Depending on the use that we are going to give to the inverter and where we are going to install it, we must keep in mind two main factors, the voltage of the batteries that we have and the power that we need.
The supply voltage is usually 12 volts or 24 volts, depending on where we are going to install the inverter, if we want to install it in a motorhome, a car, a van, etc. We will need a 12V inverter because these vehicles operate at 12 volts, and if we want to install it on a truck, on a forklift, on a boat, etc. We must install a 24 Volt inverter.
The power to choose is based on the watts that we want to have or that the equipment needs.
In the case of power, it is important to keep in mind the starting peaks of the equipment that we are going to connect and leave a power margin, because the inverter can't work at maximum load continuously, for example, if we want an inverter for a van to charge a laptop that consumes 100W and we want to charge the battery of a drill that consumes 50W, the sum is 150W, if we connect the 2 at the same time, the charging process can take 2 hours or more and during that time the inverter will be working at 100% of its capacity, this can create an overheating of the equipment and an excess of consumption, so the recommended thing would be a team that supplied us from 250W so it would work between 60% and 70% of its capacity and we would avoid those losses.
The type of wave
Another factor to consider would be the type of wave.
The domestic network supplies us 220V of alternating current, with a sine wave of 50 Hertz of frequency in which we can differentiate Phase, Neutral and Grounding.
There are inverters that offer us these characteristics, they are commercially called Pure Wave Inverters.
As an alternative to pure wave inverters and depending on the use, we could install a Modified or Square Wave inverter, they are cheaper equipments and they have an excellent performance.
These inverters also offer us 220V output and 50 Hertz of frequency, the difference is that the wave is not pure sine, it is square and they work well with most of the equipments that we want to connect, excluding equipment that works exclusively with a pure sine wave.
What equipment works exclusively with a pure sine wave?
There is no a standard, mainly they are computers that need 50 hertz of the network to mark their internal clock; like some programmers, equipment that works with frequency inverters, intensity regulation, air conditioning equipment, etc. depends on the manufacturer.
These equipments have a high probability that they will not work with Modified Wave, however, all the equipments that work with power supplies, battery chargers, resistors, single-phase single motors, lighting, etc. They work perfectly with Modified Wave inverters.
At DCU Tecnologic we have in our catalog a range of 12 and 24 volt inverters from 150W to 4000W and that supply pure or modified wave. Check all our models here.