The length of charge is heavily dependent on the light type, its technical features and its location. For example, a solar street light will take longer to charge than a portable solar camping light, since it has a bigger battery and will need more energy when it’s in use. Most lighting manuals will provide guidance on the length of charge time.If you are experiencing issues with you solar light, we recommend charging it for 24 hours in direct sunlight. Check out our troubleshooting guide for more information.