How does one look at transformer power inverters vs transformerless power inverters? For starters, one must look at three basic points namely power distribution efficiency, system complexity or simplicity and of course, its costs.
Power inverters work to convert direct current, such as the power coming from a car battery, into alternating current, such as those needed by cell phones to charge, vacuum cleaners to work, and lamps to turn on. In other words, they are the means by which large primary input current is converted to manageable output current. These are indispensable tools in aiding with the measurement of alternating current.
The ‘transformer’ in transformer power inverters refers to a device which has two circuits partnered by a magnetic field that is both linked to each. The change in one circuit affects the other. They are used for the conversion of large primary currents into smaller, easy to measure, secondary currents. Most of these products have different sizes and shapes but are usually used in the same manner which is as an interfacing solution that will bridge the gap between high currents and instrumentation devices.
On the other hand, transformerless power inverters are a more current innovation. It is considered to be one of the biggest advancements in inverter technology. This design offers integrators, independent power-producers, and it maximizes power distribution while simplifying the system for installation. It is also important to note that it is greatly beneficial for large scale installations. As they say, less is more.
With the absence of a transformer, the inverter becomes more compact or around 50% to 70% smaller and lighter than its transformer-based counterpart with similar output, making integrators freer to install and design as they wish. As with most advancement, the resulting technology is usually more efficient as with the case of this inverter. In terms of generating energy, it is proven to be more capable. It also removes the necessity for inverter-centric transformers and balance-of-system costs. It is also cheaper to produce because it no longer needs unnecessary wiring such as copper wiring made up of iron or steel core. However, as with all the things in life and work, it still has its drawbacks. Most important is its requirement of having the DC wiring to be ungrounded. Because of this, they must meet more standard rules as per regulations. These are just some of the main differences of transformer power inverters vs transformerless power inverters.