Yes, solar panels can indeed power devices directly without an inverter if the devices are compatible with DC power. However, most household appliances require alternating current (AC), and in such cases, an inverter is necessary to convert the DC output from solar panels into.
Why Can't I Have Solar Power During a Blackout With Grid-Tied PV Systems?
Grid-tied systems are the most common type of PV system that do not require a solar energy storage system to operate. The reason for this is that t...