The short lifetime of lead-acid batteries in solar home
systems can significantly increase their life-cycle environmental impacts.
Studies show that under such conditions, the global warming potential can reach
up to 1.4 kg CO₂ per kWh
delivered, which may exceed the impacts of diesel generators in
several environmental impact categories.
The sight is becoming familiar across
Lagos—gleaming solar panels perched on rooftops in Lekki, Ikeja, Yaba and other
rural communities around Lagos silently powering homes and businesses through
the city's notorious grid collapses. From the bustling markets of the mainland
to the expanding estates in Victoria Island, solar energy has become the quiet
hero of Lagos living. About one-third of Nigerians still lack access to
electricity, and for those connected to the grid, frequent blackouts remain a
frustrating reality. Access to electricity has long been a symbol of progress
and development, and we can’t deny that this development indicator is not
waxing strong for Nigeria. Across Nigeria
and other parts of the developing world, off-grid solar technologies have
emerged as a beacon of hope, powering millions of homes that national grids
cannot reach or have consistently not served. Solar home systems and pico-solar
lamps are transforming lives —lighting homes, charging phones, and enabling
children to study after sunset.
This
solar revolution is real and accelerating. Nigeria's solar capacity reached
approximately 385–400 MWp by the end of 2024, placing the nation among the top five
solar adopters in Africa. Solar imports soared nearly 94 per cent in 2023 alone.
For millions of Lagosians, solar power means children can study after dark,
small businesses can stay open longer, and families can escape the choking
fumes of generators. But as the sun powers Nigeria's future, a shadow grows in
its light. What happens when today's gleaming panels and batteries reach the
end of their useful lives? Without urgent action, Lagos could face an
environmental crisis that transforms the promise of clean energy into a new
form of pollution—one that threatens the health of communities across the city
and state.
The Scale of the Coming Challenge
To
understand the challenge, consider the numbers. Every solar panel installed
today has a lifespan of 20 to 25 years. Every battery—typically three to five years.
This means that the explosive growth in solar adoption now guarantees an
equally explosive wave of waste, particularly electronic waste, in the decades
ahead. Projections are sobering, and solar panel e-waste metrics in Nigeria are
expected to surge from 3.3 million kilograms in 2021 to 60.3 million kilograms
by 2040. If Nigeria scales solar photovoltaic capacity to 30,000 MW— a
plausible target given current growth, over 280 million batteries will be
needed over time, each requiring proper disposal. The volume of batteries from
the renewable sector alone could hit 200 million tonnes by 2040; these are not
abstract figures. In Lagos, where population density is among Africa's highest
and land is at a premium, millions of spent batteries and decommissioned panels
will need somewhere to go. Without preparation, that "somewhere"
could be the city's already overstretched dumpsites, or worse, open spaces,
drainage channels, and informal dumpsites in densely populated communities.
The Toxic Reality: What's Inside
"Clean" Energy?
When
discarded, solar panels and batteries become electronic waste, non-degradable
materials that pose serious threats to ecosystems. The most immediate danger
comes from batteries. These lead-acid batteries, still widely used in Nigerian
solar installations due to their affordability, contain lead—a potent
neurotoxin that causes irreversible brain damage and cellular disruption, to
name a few. When these batteries are disposed of inappropriately, they can leak
into soil and groundwater, and the health impacts are severe. Lead exposure
permanently affects children's brain development. Even lithium-ion batteries,
increasingly common in newer installations, contain materials that can contaminate
soil and water if not handled properly. Unfortunately, when untrained
scavengers recover materials from leaking/waste batteries, they risk exposure
to toxic contents and contaminate the environment, particularly water and soil.
While lead-acid batteries are the most damaging component—occupying 54 - 99% of
each environmental impact category in lifecycle assessments—they are not the
only concern. Solar home systems contain a variety of materials, including
printed circuit boards, plastics, and photovoltaic panels.
The Regulatory Vacuum: Nigeria's Legal
Blind Spot
Here
is the uncomfortable truth: Nigeria has enthusiastically embraced solar energy
without putting in place the legal framework to manage the waste it will create,
consider what this means in practice. No law compels a solar company, equipment
importer, or system owner to ensure that panels and batteries are properly
recycled at end-of-life. No regulations require setting aside funds for future
decommissioning. No agency has clear authority to track solar waste or enforce
safe disposal. This vacuum matters because solar equipment doesn't simply
disappear. Unlike the familiar generators they replace—which at least can be
sold for scrap metal—solar panels and modern batteries require specialized
recycling processes and without legal requirements, the path with least
resistance is dumping.
Lagos at the Frontlines
Lagos
finds itself at the epicenter of both the solar boom and the coming waste
challenge. As Nigeria's commercial capital and largest city, Lagos accounts for
a substantial share of solar installations. The same factors that make solar
attractive—unreliable grid power, high fuel costs, and a population willing to
invest in alternatives—also concentrate the waste stream. The good news is that
Lagos is also where solutions are beginning to emerge. The Lagos Electricity Law, 2024, aims to,
1.
create a commercially and
technically sound Market that is well-funded and financially viable;
2.
facilitate the delivery of
affordable, reliable, sustainable and modern public electricity access to
consumers in the State;
3.
facilitate investment and
innovation within the Market;
4.
incentivise the behaviour of
licensees, electricity consumers, investors and other market participants,
ensuring the delivery of constant, reliable and cost-efficient electricity
supply to consumers in the State; and
5.
promote the provision of off-grid
solutions for households, and micro, small and medium-scale enterprises in the
State
For
us in Lagos, to set a good example in solving problems related to the solar
boom, we must put in place a strong regulatory framework. The National Policy
for the Management of Used Off-Grid Renewable Energy Equipment (OGREE) is in
its final stage. However, the State government can set up guidelines that mandate:
1. Extended Producer Responsibility
(EPR)
Manufacturers and importers should be required
to: Take back expired equipment, Finance recycling programs and Establish
collection points. This shifts responsibility from communities to producers.
2. Battery Collection & Recycling
Systems
The government can mandate a deposit-return
system that will encourage: licensing certified recyclers, prohibiting informal
battery dismantling, and creating buy-back incentives to ensure an environmentally
friendly system for managing battery collection and recycling.
3. Environmental Education and Public
Awareness
Environmental education is key to solving new
environmental changes. Users must understand that batteries should not be
dumped and that the risks of informal dismantling are harmful to health and the
environment. Community education is essential.
Conclusion
Off-grid renewable energy is a
powerful tool for development and climate mitigation, yet sustainability must
extend beyond installation. Managing solar panels, batteries, and electronic
components responsibly ensures that clean energy does not create a hidden
pollution problem. The alternative is unacceptable:
millions of solar devices bringing not just power to homes but also lead
poisoning to children, toxic pollution to communities, and environmental damage
that undermines the very benefits solar energy promises, just because their
waste wasn’t handled appropriately. For Lagos
residents—whether you live in Lekki, Ikeja, or the mainland—the message is
simple: “Your solar panels and batteries will not last forever. When they fail,
how you dispose of them matters.” Where you buy your equipment matters, as does
which companies you support.
The
goal is power without poison—clean energy that remains clean at every stage of
its life. Nigeria has the opportunity to build that future, the foundations are
being laid now. As citizens, we have the right to clean energy and clean
communities. We have the right to Clean Energy Access without poison. The question
is whether we will demand it. The next phase of renewable energy expansion
must integrate:
- Lifecycle
planning
- Waste
management systems
- Regulatory
reform
- Private
sector accountability
Clean energy must also mean clean
disposal.





