Solar microinverters are gradually gaining popularity. By a microinverter, each solar panel gets an inverter for itself. They also have longer and reliable lifetime when compared to string inverters. US is the biggest market for microinverters and Enphase Energy is the largest manufacturer there. In India, they are still not popular. But with rooftop gaining momentum, the microinverters should also gradually catch up to the pace.
Microinverters are currently costlier than the string inverters however they are intelligent and smart system and come with programming that detects the defect at an inverter level and corrects it.