Solar Inverters Guide: Types, Brands & How to Choose (2026)

String inverters connect all panels in a series and convert power centrally. They cost less but underperform when panels have different conditions. Microinverters attach to each panel individually, optimizing each one separately. Microinverters cost 10-20% more but deliver 5-15% more energy in shaded conditions.

Power optimizers like SolarEdge attach to each panel but feed into a central inverter. They offer panel-level optimization at a lower cost than microinverters. SolarEdge dominates this category with robust monitoring and a proven track record in millions of installations.

Enphase leads microinverters with the IQ8 series offering grid-independent operation. SolarEdge dominates power optimizers with excellent monitoring software. SMA is the leading string inverter brand for larger systems. Each brand offers 12-25 year warranties.

Choose microinverters (Enphase) for roofs with shading or multiple orientations. Choose power optimizers (SolarEdge) for good-condition roofs wanting panel-level monitoring. Choose string inverters for large, unshaded roofs where cost is the priority.