I had a box in my garage. You probably have one too. It’s the box where dead solar lights go to sit for two years while you figure out what to do with them.
Mine started with a couple of path lights that stopped turning on. Then a string of fairy lights that got waterlogged. Then a motion sensor light that wouldn’t hold a charge. I kept tossing them in the box because throwing them in the trash felt wrong, but I didn’t actually know what the right move was. So they sat.
Eventually the box got embarrassing. I counted — eleven dead solar lights. Eleven. And I started wondering how many of these things end up in landfills every year, because if every household on my block has a box like mine, that’s a staggering amount of solar light waste piling up quietly in garages across the country.
This is what I figured out after actually dealing with it. It’s less straightforward than you’d think, and the part that matters most is the battery.
You Can’t Just Throw Solar Lights in the Trash
Here’s the thing I didn’t fully understand until I started reading: solar lights aren’t just plastic and glass. They’re small electronic devices with batteries inside them, and those batteries have specific disposal rules. In a lot of places, it’s actually illegal to toss rechargeable batteries in the regular trash.
California, New York, Minnesota, and several other states have laws on the books. Even where it’s not strictly illegal, it’s a bad idea. The batteries inside solar lights can leak heavy metals into groundwater, and lithium-ion batteries can literally catch fire when they get crushed in garbage trucks. That’s not a hypothetical — waste management companies deal with battery fires regularly.
So if you’ve got old solar lights piling up and you’re trying to figure out how to dispose of solar lights properly, the responsible move is to break them down and handle each part the right way. Let me walk through what’s actually inside one of these things, because once you understand the components, the disposal starts making sense.
What’s Actually Inside a Solar Light
I took one apart to see. Most cheap solar garden lights have the same basic solar light components, and once you know what they are, you can sort them for recycling without guessing.
The housing. This is the plastic or metal shell. If you separate it from everything else, the plastic part can usually go in your regular recycling bin — though check your local rules, because not all municipalities take every plastic type. Metal housings can go to a scrap metal recycler.
The solar panel. That little dark rectangle on top is a small photovoltaic cell. It contains silicon and sometimes trace amounts of other metals. This is e-waste. It doesn’t go in your recycling bin, and it definitely doesn’t go in the trash. It needs to go to an electronics recycling drop-off.
The battery. This is the critical one, and I’m going to spend a minute on it because it’s where most people mess up. Solar lights use one of three battery types: NiMH (nickel-metal hydride), NiCd (nickel-cadmium), or lithium-ion. Each has different disposal rules, and getting it wrong has real consequences.
The LED. The little light bulb itself. It’s a tiny amount of semiconductor material. Treat it as e-waste along with the panel and circuit board.
The circuit board. This is the small green board that controls when the light turns on and off. It’s got lead solder on it, which means it needs proper e-waste recycling — not the trash, not regular recycling.
The wiring. Usually copper. If you’re the type who saves scrap metal, this is the good stuff. Otherwise, bundle it with the e-waste.
So when you’re looking at solar light parts, you’ve basically got: regular recyclables (housing), scrap metal (wiring), and e-waste (panel, LED, circuit board, battery). The battery is the one that needs the most care, so let’s dig into that.
The Battery Disposal Rules (Read This Part)
I’m going to be direct here because this matters. Never throw rechargeable batteries in the regular trash. Not the ones from your solar lights, not the ones from your old phone, not any of them. This is rechargeable battery disposal 101, and solar light battery disposal follows the same rules since the batteries are the same types you’ll find in other household electronics. It’s the thing almost everyone gets wrong.
NiMH batteries are the most common in newer solar lights. They’re relatively safe — no highly toxic metals — but they still contain nickel, which you don’t want leaching into soil. Take them to any battery recycling location. Most hardware stores, electronics stores, and auto parts stores have drop-off bins right inside the front door.
NiCd batteries are the ones to really watch for. They contain cadmium, which is toxic and can leach into groundwater. Cadmium is nasty enough that it’s been banned in many countries, but it still shows up in cheap imported solar lights. If you’ve got an older light or a very inexpensive one, assume the battery might be NiCd and treat it accordingly. Must be recycled. No exceptions.
Lithium-ion batteries are increasingly common in solar lights, especially the brighter ones and the ones that claim to run all night. These are the batteries that can catch fire if they get punctured or crushed — and garbage trucks do a lot of crushing. If you’re recycling a lithium-ion battery, tape the terminals with electrical tape or packing tape before you drop it off. Some recycling centers also want them in separate plastic bags. This isn’t being extra cautious; it’s standard safety protocol that prevents fires at recycling facilities.
For finding where to take them, search “battery recycling near me.” There’s a program called Call2Recycle that has a locator on their website, and most of the big hardware and electronics chains have bins you can walk in and use. Solar light battery recycling is genuinely easy once you know where to look. The hard part is just remembering to do it instead of tossing the whole light in the trash because it’s easier.
Before You Recycle: Can It Be Saved?
Here’s the part that surprised me. Before you break down a dead solar light for recycling, it’s worth checking whether it’s actually dead. I went through my box of eleven lights and discovered that a bunch of them weren’t broken at all — they just had dead batteries.
Dead battery. This is the most common failure mode, and it’s the cheapest fix. A replacement NiMH AA battery costs maybe two or three dollars. I swapped batteries in three of my “dead” lights and all of them came back to life. Three lights, six bucks. That’s the best return on investment I’ve had in a while, and it made me feel a little foolish for assuming they were all broken.
Corroded battery contacts. If a battery leaked at some point, the contacts get crusty and the light stops working even with a fresh battery. Clean the contacts with white vinegar and a cotton swab. Scrape off the corrosion gently with a small screwdriver or a toothpick. This brought back one more light for me. Cost: nothing.
Cracked housing. If the plastic shell is cracked but the electronics still work, the light might still function — it’s just ugly. Or you can pull the internals and use them for something else. More on that below.
Water-damaged circuit board. If water got inside and corroded the board, it’s usually done. You can look for obvious damage — green or white crust on the board, swollen components, burn marks — but if the board is fried, recycle it. Not worth the effort to fix.
Cloudy solar panel. The panel on top can get cloudy or yellowed from UV exposure, which kills its ability to charge. Sometimes this is just dirt or haze that you can clean off with a soft cloth and some soapy water. If it’s actual UV damage to the plastic covering the panel, the light is probably finished. Worth trying to clean first though, because a dirty panel is a common and fixable problem.
So out of my eleven dead lights: three came back with new batteries, one came back with cleaned contacts, two had cracked housings but working internals that I set aside for repurposing, and five were genuinely done and went to recycling. That’s a lot of waste I almost created for no reason. If you’re wondering what to do with broken solar lights, the first answer is always: check the battery.
Repurposing Lights That Still Work
If you’ve got solar lights that function but you’re tired of them in your yard — maybe they don’t match your new setup, or they’re just old — you don’t have to throw them out. There are better options than that.
Donate them. Community gardens, school gardens, churches, and local nonprofits often take working solar lights. I gave four of mine to a community garden down the street and they were genuinely excited to have them. Solar lights are useful in places without outdoor wiring, and a nonprofit won’t care that the housing is faded.
Move them somewhere less visible. Not every light needs to be a showpiece. Working solar lights are great inside a shed, the back of a garage, under a deck, or along a side path where you just need a little illumination and looks don’t matter. They don’t have to be pretty if they’re functional.
Keep a few for emergencies. This is one I hadn’t thought about until someone mentioned it. Charged solar lights are basically free emergency lighting. Keep two or three in a drawer, and when the power goes out, you’ve got instant light without digging for flashlights and fresh batteries. The solar panel means they recharge themselves during the day if you set them in a window. Simple, but it works. I’ve got two in my kitchen drawer now and I’ve used them twice during outages.
Give them to kids. Solar lights are catnip for kids who like building forts, and the internals are genuinely interesting for science projects. The solar panel, battery, and LED form a complete mini electrical circuit that a kid can actually understand and mess with. Just take the battery out first if it’s a younger kid, and supervise. My neighbor’s twelve-year-old spent a whole afternoon wiring LEDs together from three old lights I gave him.
Salvage the solar panels. If you’re into DIY electronics, small solar panels from garden lights are useful for charging small devices, running tiny motors, or learning about photovoltaics. There’s a whole community of people who repurpose solar lights this way.
The Uncomfortable Environmental Reality
Here’s the part that doesn’t get talked about enough. Solar lights are marketed as eco-friendly — and compared to wired lights running off grid power, they are. But they’re also designed to be disposable, and that’s the truth nobody puts on the packaging.
According to data from the UN Environment Programme, only about 5% of small solar product batteries get recycled globally. Five percent. The rest end up in landfills, incinerators, or informal dumping sites. When you think about how many solar lights are sold every year — millions, just in the US — that’s an enormous amount of material going to waste.
The solar light environmental impact is real, even if it’s smaller than the impact of running a hundred feet of incandescent path lighting off your house power for eight hours a night. The problem is that “eco-friendly” has become a marketing word more than an engineering one. A cheap solar light with a sealed battery that dies in eighteen months is not eco-friendly, no matter how much sunlight it runs on. The solar garden light disposal problem is invisible to most people because the lights are small and they fail one at a time, so you never see the cumulative pile.
The single biggest thing you can do to reduce waste is buy lights with replaceable batteries. That’s it. If you can open a battery compartment and swap in a new three-dollar battery every couple of years, one light can last five, eight, ten years instead of eighteen months. The math is stupid simple: a $30 light with a replaceable battery that lasts five years is cheaper and less wasteful than a $10 light with a sealed battery that you throw away after a year and a half.
I’m not saying cheap solar lights are evil. They’re not. I own some. But if you’re going to buy them, go in with realistic expectations about how long they’ll last, and have a plan for what to do with them when they die — because “I’ll figure it out later” is how you end up with a box of eleven dead lights in your garage.
Buying Your Next Solar Lights
If you’re in the market for new solar lights — and if you’re reading this, you probably will be soon — here’s what I’d tell you to look for, having learned all this the hard way.
Look for lights with battery compartments you can actually open. This is the number one feature. If the battery is sealed inside, walk away. You’re buying a disposable product dressed up as a sustainable one.
Avoid glued-shut or sealed housings. Same idea. If the manufacturer used glue or welded plastic to keep you out of the internals, they’ve designed the light to be thrown away. Lights with screws are a good sign. Lights that pop open with a latch are even better.
Check if replacement batteries are available. Some manufacturers sell replacement battery packs for their lights. That’s a strong signal they expect the light to outlast the original battery. If you can’t find replacements from the maker, at least make sure the light uses a standard battery size (AA or AAA NiMH is common) that you can buy anywhere online or at a local store.
Buy fewer, better lights. This is the advice nobody wants to hear, including me. It’s tempting to buy a twenty-pack of cheap solar lights online for the price of three good ones. But twenty cheap lights become twenty pieces of e-waste in two years. Three good lights with replaceable batteries might still be working in five years. Less money over time, less waste, less stuff in your garage box.
We sell solar lights at heoxo.com, and I’ll be straight about why this matters to us: the throwaway culture around cheap solar lights is bad for the industry and bad for the planet. Lights that last longer and can actually be repaired aren’t just better for you as a customer — they’re the only way this product category is genuinely sustainable. If you’re going to spend money on outdoor lighting, spend it on something you won’t have to throw away next spring. Solar light recycling is better than the trash, but not needing to recycle in the first place is better still.
What to Do With That Box in Your Garage
If you’ve got your own box of dead solar lights sitting somewhere, here’s the short version.
Sort them. Test the ones that might still work — a new battery costs less than a coffee and might save the whole light. Clean corroded contacts with vinegar. Set aside anything that’s truly dead.
Take the batteries out, figure out what type they are, tape the terminals if they’re lithium-ion, and drop them at a battery recycling location. Most hardware and electronics stores have bins, and Call2Recycle has a locator on their site if you’re not sure where to go.
Put the housing in regular recycling if your local program takes the plastic type. Take the panel, circuit board, LED, and wiring to an e-waste drop-off — most counties have collection days or permanent sites, and it’s usually free. Repurpose or donate anything that still works. Someone can use them.
And next time you buy solar lights, buy ones you can actually repair. That’s the real fix — not better recycling, but less stuff that needs recycling in the first place.
The box in my garage is empty now. Three lights went back in the yard with fresh batteries. Four went to the community garden. Five went to recycling, properly separated. I kept two charged ones in a kitchen drawer for the next power outage. It took an afternoon, and honestly I should’ve done it two years ago. But at least none of them went in the trash. That’s the part that actually matters.
