Yes, the Reolink Solar Panel does need direct sunlight in order to work properly. The solar panel needs to be exposed directly to the sun's rays for optimal performance and charging of your Reolink camera battery. It is important that you place the panel in a spot where it will receive full, uninterrupted exposure from sunrise to sunset each day. Additionally, if possible, try angling the panel slightly towards the south or southwest so that it can capture more light during peak hours and charge faster.