Place your outdoor solar lights in a sunny enough location. This may seem obvious, but outdoor solar lights require sufficient hours of sun per day so that they are able to recharge their batteries adequately. The number of hours of sun that an outdoor solar light requires per day depends on the quality and design of the outdoor solar light, the size and type of the solar panel that is a part of the outdoor solar light, the number and strength of the light bulbs that the outdoor solar light has and the number and type of batteries that it has. An outdoor solar light with a larger solar panel relative to the light that it produces may shine for a longer time and require fewer hours of direct sunlight.
Carefully consider the potential location of your outdoor solar lights. Look to see if anything might be shading them from direct sunlight. This could include trees, bushhes, plants ,ills, posts, buildings, house eaves or overhangs, steps, walls, vehicles, or anything else that blocks direct sunlight from shining on the outdoor solar lights. Look at your potential location for the outdoor solar lights during several times of day and see how much shade there is at different times. If there is too much shade in that spot for too long during the day, then it may be better for you to select a different location for your outdoor solar lights.
If possible and if it is adjustable, then make sure that the outdoor solar light panel is facing south. Solar spotlights, for example, have an attached solar panel that can be turned toward the sun. If you can adjust the angle of the mini panel, then the panel should be angled at an ideal angle for your geographical location. The idea is to have the panel facing as flat as possible relative to the angle of the sun for as many of the direct sun hours as possible.
Depending on your geographical location, the angle of the sun and the number of hours of direct sunlight will change during the summer and winter. The sun may be less strong, at a lower angle and shine for fewer hours during the winter. On the other hand, there may be fewer leaves on surrounding trees during the winter, which may mean less that is blocking sunshine onto the outdoor solar lights during the winter.
Take the weather into account. Cloud, rain, falling snow and fog all decrease the strength of the sun that reaches your outdoor solar lights' panels, which affects the ability of your outdoor solar lights to recharge. On a day that has been very cloudy all day, outdoor solar lights will not be able to charge as effectively as they would on a sunny day.
Keep the solar panel on the outdoor solar lights clean. Rain, dust, dirt, ice or snow can accumulate on them. If you check and wipe their solar panel areas off occasionally, then your outdoor solar lights will be able to receive sunshine better and charge more effectively.
If you keep these tips in mind, then you will have a better experience with your outdoor solar lights and you will get more out of them.