Do I need to put my keyboard under the sun for charging?

No, sunlight is not required. Artificial lighting, such as ceiling lamps or desk lamps, is also sufficient as long as the brightness is at least 200 lux illuminance.

Download Logi Options+ and use the built-in LightCheck function to determine if your workspace provides enough light to keep the keyboard charged.

Note: It is not suggested to put the keyboard under direct outdoor sunlight. It might lead to overheating and stop charging.