SDG 7 Affordable and Clean Energy

Understanding SDG 7: Affordable and Clean Energy

SDG 7 aims to ensure access to affordable, reliable, sustainable and modern energy for all. Achieving this goal requires a deep grasp of the forces shaping global electricity demand, the policy tools that drive renewable adoption, and the design strategies that reduce energy consumption. This course breaks down the key concepts highlighted in a recent quiz, providing clear explanations, real‑world examples, and actionable insights for students, professionals, and policy‑makers.

1. Why Global Electricity Demand Is Rising – The EV Effect

In 2025, the most direct driver of the rapid increase in worldwide electricity demand was the increased use of electric vehicles (EVs). As governments set ambitious decarbonisation targets, EV sales have surged, creating new, sizable loads on power grids.

Key points about EV‑driven demand

• Charging load: An average EV requires 15‑30 kWh per 100 km. When millions of drivers charge at home or at public stations, the cumulative demand can add tens of gigawatts to the grid.
• Peak‑time stress: Uncoordinated charging often coincides with existing residential peaks, amplifying stress on distribution networks.
• Grid‑level opportunities: Smart‑charging, vehicle‑to‑grid (V2G) technology, and time‑of‑use tariffs can turn EVs from a demand challenge into a flexible resource.

Understanding this shift is essential for engineers designing next‑generation infrastructure and for policymakers crafting incentives that balance demand with clean generation.

2. Feed‑in Tariffs (FIT) – A Powerful Renewable Incentive

A feed‑in tariff (FIT) is a policy mechanism that guarantees long‑term, fixed payments to producers of renewable electricity. Unlike tax credits or subsidies that may fluctuate, FITs provide certainty, encouraging investment in technologies such as solar PV, wind, and small‑scale hydro.

How FITs work

• Guaranteed price: Generators receive a pre‑agreed price per kilowatt‑hour for the electricity they feed into the grid.
• Contract length: Payments are typically secured for 15‑20 years, covering the lifespan of most renewable assets.
• Market impact: By ensuring revenue, FITs reduce financing risk, lower the cost of capital, and accelerate deployment of clean energy.

The primary purpose of a FIT, as highlighted in the quiz, is to guarantee long‑term payments for renewable electricity, not to tax households or limit renewable penetration.

3. Calculating FIT Credits – A Simple Example

Consider a household that generates 20 kWh of solar electricity and consumes 12 kWh. The excess 8 kWh can be exported to the grid and compensated at a FIT rate of $0.10 /kWh.

Step‑by‑step calculation

• Exported energy = Generated – Consumed = 20 kWh – 12 kWh = 8 kWh.
• Credit = Exported energy × FIT rate = 8 kWh × $0.10/kWh = $0.80.

This straightforward arithmetic demonstrates how FITs translate renewable generation into tangible financial benefits for prosumers.

4. SDG 7 Target 7.3 – Doubling Energy‑Efficiency Improvements

Among the eight SDG 7 targets, Target 7.3 specifically calls for doubling the global rate of improvement in energy efficiency by 2030. This target is crucial because efficiency gains reduce the amount of energy needed to deliver the same services, lowering emissions and costs.

Why energy efficiency matters

• Reduces overall electricity demand, easing the need for new generation capacity.
• Delivers immediate cost savings for households and industry.
• Supports other SDGs, such as poverty eradication (SDG 1) and climate action (SDG 13).

Policies that align with Target 7.3 include appliance standards, building codes, industrial retrofits, and demand‑side management programs.

5. Coal’s Share of Global Electricity in 2025

Despite a global push toward decarbonisation, coal remained a dominant source of electricity in 2025, supplying 34 percent of total generation. This figure reflects the inertia of existing coal‑fired plants and the slower pace of transition in some emerging economies.

Implications of a 34 % coal share

• Significant CO₂ emissions continue to drive climate change.
• Coal’s price volatility can affect electricity affordability.
• Retrofitting or retiring coal plants is essential to meet the Paris Agreement goals.

Understanding coal’s role helps stakeholders prioritize where to allocate resources for clean‑energy investments.

6. Renewable Capacity Surge in 2025 – Solar Leads the Way

The world added roughly 800 GW of renewable capacity in 2025. Solar energy accounted for the largest share of this increase, outpacing wind, hydropower, and geothermal.

Drivers of solar’s rapid growth

• Declining module costs – solar PV prices fell below $0.20 /W in many markets.
• Scalable deployment – rooftop, utility‑scale, and floating solar projects can be installed quickly.
• Policy support – FITs, tax credits, and net‑metering schemes have accelerated adoption.

Solar’s dominance underscores the importance of integrating storage and grid‑flexibility solutions to handle its variable output.

7. Six Major Benefits of Affordable and Sustainable Energy

Affordable clean energy delivers a suite of societal advantages. The quiz listed five of the six benefits, with the sixth being reducing urban traffic congestion, which is not typically counted among the core benefits.

The recognized benefits

• Supports economic development – reliable power enables businesses to grow and creates jobs.
• Improves health – cleaner cooking and reduced air pollution lower respiratory diseases.
• Strengthens energy security – diversified domestic generation reduces reliance on imports.
• Mitigates climate change – lower greenhouse‑gas emissions help meet global temperature targets.
• Enhances gender equality – time saved from fuel collection can be redirected to education and income‑generating activities.

While reduced traffic congestion is a valuable urban outcome, it is more directly linked to sustainable transport policies than to the core objectives of SDG 7.

8. Passive Design vs. Active Integration in Buildings

In building planning, the reviewer highlighted a key distinction: Passive design reduces energy demand before adding renewable systems. This approach contrasts with active integration, where renewable technologies are installed after the building’s energy needs have been established.

Passive design strategies

• Optimised orientation and shading to maximise daylight while minimising heat gain.
• High‑performance insulation and airtight construction to limit losses.
• Thermal mass that stabilises indoor temperatures.

Active integration examples

• Rooftop solar PV systems.
• Heat‑pump HVAC units powered by renewable electricity.
• Battery storage that supplies power during peak demand.

Combining passive and active measures yields the most efficient, cost‑effective, and resilient buildings, aligning with both SDG 7 and broader sustainability goals.

9. Bringing It All Together – Key Takeaways for SDG 7

To accelerate progress toward affordable and clean energy, stakeholders should focus on the following actions:

• Promote EV adoption while deploying smart‑charging infrastructure to manage new electricity loads.
• Implement well‑designed FITs that guarantee long‑term revenue for renewable generators.
• Educate households on how FIT credits are calculated to encourage prosumer participation.
• Prioritise policies that meet SDG 7 Target 7.3 by improving energy‑efficiency standards across sectors.
• Accelerate the retirement of coal plants, aiming to reduce the 34 % share in the global mix.
• Leverage the rapid growth of solar capacity with complementary storage and grid‑integration solutions.
• Communicate the six core benefits of affordable clean energy to build public support.
• Adopt a holistic building approach that starts with passive design and then adds active renewable systems.

By integrating these strategies, governments, businesses, and individuals can collectively move the needle on SDG 7, delivering a cleaner, more resilient, and more equitable energy future.