🗺️ Global Solar Payback & True Grid Cost Heatmap
What does electricity really cost around the world, and where does going solar pay off fastest? This map models 40,000+ locations worldwide. Crucially, it accounts for the percentage of the population serviced by the grid versus backup generators — weighting paper utility tariffs with real fuel costs ($0.40–$0.65/kWh) for an accurate picture of electricity costs across the whole population.
Key Takeaways
⚡ Fastest Payback
🔴 Slowest Payback
How this works & The Generator Paradox
Why do fragile grids look cheap on paper, but solar is actually exploding there? In countries like Nigeria (43% un-electrified, remaining 57% on rolling blackouts), Lebanon, Haiti, and Pakistan, official utility rates look low ($0.05–$0.09/kWh) because power is heavily rationed or subsidized. When the power cuts out, families and businesses burn petrol and diesel generators at $0.40–$0.65/kWh.
- True Grid Cost View (Default): Calculates the weighted average cost of electricity across the entire population, factoring in the percentage serviced by the grid versus backup generators.
- True Cost (Weighted) Basis: Blends official rates with generator fuel costs weighted by unserved population and average grid outage duration. Nigeria's true electricity cost is ~$0.41/kWh (payback under 1.5 years) despite a nominal tariff of $0.07/kWh.
- Grid Only Basis: Assumes a 24/7 unlimited stable grid at brochure utility prices.
- Solar yield: Annual kWh per kW of panels simulated from NASA satellite weather stations.
- System cost: Panels + LFP battery + inverter at landed-DIY pricing including regional freight.
Want exact numbers for your specific location? Run the full calculator →