Improvements in Solar and Associated Technology

Improvements in Solar and Associated Technology

Think of a solar streetlight as an energy budget on a pole. The panel collects energy during the day, the battery stores it, and the LED uses it at night. Improvements across all three areas are making that energy budget work harder.

Solar Panels: Solar module prices have fallen by about 90% since 2010, from roughly $2.44 per watt to $0.26 per watt. The cost of electricity from a small solar system has also dropped significantly, from 61.5 cents/kWh to 14.6 cents/kWh. For streetlighting, lower panel costs make it more practical to size systems with extra capacity for shorter winter days and periods of limited sunlight.

Batteries: Battery technology has improved along with costs. Lithium-ion pack prices reached a record low of $108/kWh in 2025, down 93% from 2010. The growing use of lithium iron phosphate (LFP) batteries also brings benefits such as long cycle life and good temperature performance. That makes it more practical to design systems with enough stored energy to keep lights running through multiple low-sun days.

Luminaires: Using LED technology in luminaires is helping solar streetlights get more from every watt of stored energy. The U.S. Department of Energy’s roadway lighting research shows how LED optics can provide the light levels needed for roads while improving light distribution and reducing wasted light. Dimming the lights intelligently when full brightness is not needed also helps to lower the energy consumption.

Smart solar controller makes all of the above work together efficiently: Smart cellular solar controllers that monitor and manage solar lighting infrastructure have become affordable and are easy to deploy. Smart solar controllers employ advanced software to capture more energy from the solar panels and ensure that the battery is charging at the optimal rate to prolong the life of the battery. The smart controllers also have the ability to dim the lights and stretch the stored energy during periods of limited sunlight.

Improvements in solar and battery technology have lowered the cost of generating and storing electricity whilst advances in LED technology have significantly reduced the energy consumed by the luminaires. The above coupled with a smart solar controller that does intelligent optimization have made solar streetlighting a viable option.