Transformerless (TL) inverters adopt switch mode (SMPS) technique to convert from DC to high frequency AC, back to DC and finally standard frequency AC making the circuit boards much more complex. Unlike transformer based inverters that synchronize battery DC voltage with AC output.
DC and AC circuits are not electrically isolated in transformerless inverters and are exposed to lightning/grounding protection concerns.
Faults in transformerless inverters are usually lethal with severe damage due to lack of electrical isolation in DC and AC circuit.Nevertheless, transformerless offers the advantage of less weight, less loss and high conversion efficiency.
Transformerless inverters are very solid in performance and reliability with the right installation, protection and load.
Transformerless hybrid inverters are our preferred for solar. Years of experience working with transformerless inverter has enabled us develop a standard installation procedure eliminating impact of external faults. These inverters are high reliable if external faults are mitigated by way of specialized protection.
