Solar Christmas Lights: Are They Worth It?
Quick answer: They’re worth it for convenience, not savings. Solar Christmas lights are great where there’s no outlet or you don’t want extension cords, but plug-in LED lights already cost only pennies per season to run, and weak winter sun can leave solar strands dim or short-lived.
Solar Christmas lights charge a small built-in battery from a mini solar panel during the day and switch on automatically at dusk. They’re handy, but it helps to know what they’re good at before you buy a few dozen strands.
How they work
Each strand has a small solar panel on a stake or clip, a rechargeable battery inside the panel housing, and a light sensor. During the day the panel charges the battery. When it gets dark, the lights turn on and run until the battery runs low. Most have a switch for steady or flashing modes, and some have timers. Nearly all use LED bulbs, which need very little power.
Will they save you money?
Not much. LED holiday lights already cost very little to run. A 100-bulb LED string uses around 5 watts, compared with about 40 watts for an old incandescent mini-light string. Running an LED string six hours a night for 40 nights uses about 1.2 kWh, which is roughly 20 cents at 2026 average electricity prices. The Department of Energy has made the same point: in its example, lighting a 6-foot tree for 40 days cost about 27 cents with LEDs versus $10 with incandescent lights.
So solar Christmas lights won’t meaningfully cut your electric bill. Switching from old incandescent lights to plug-in LEDs saves far more.
Where solar lights make sense
- No outlet nearby, such as a mailbox, fence, front gate, garden bed or a tree at the edge of the yard.
- Avoiding extension cords across walkways or the lawn.
- Quick setup, with no timers or plugs to manage.
- Rentals and apartments where running cords outside isn’t practical.
The downsides
- Winter sun is weak. Short days, low sun angles, clouds and snow mean the batteries often don’t fully charge. Expect shorter run times in December than the packaging suggests, especially in northern states.
- Placement matters. The panel needs direct sun, which can be tricky when the lights are on a shaded porch or under eaves.
- Dimmer and less consistent than plug-in lights, and the brightness can fade late in the evening.
- Batteries wear out. The small rechargeable batteries often need replacing after a few seasons.
- Short strands. Covering a whole house takes many strands, each with its own panel.
Tips if you buy them
- Put the panel where it gets the most direct midday sun, and angle it toward the south.
- Charge new strands fully in sunlight for a day or two before first use, if the instructions suggest it.
- Keep snow and dirt off the panel.
- Look for strands with a replaceable battery and an outdoor weather rating.
- Consider models that can also charge by USB for cloudy weeks.
The verdict
Solar Christmas lights are worth it for convenience in spots where plugging in is a hassle. They aren’t a money-saver and they’re not ideal as your main display, especially in cloudy northern winters. For bigger displays, plug-in LED strings on a timer are cheaper to run and more reliable.
Looking for more ideas? See solar-powered gifts and how solar energy is used.
