Idea Bank — Request for Climate Startups
Solar Bike Path
Solar-generating panels embedded in cycle-lane surfaces harvest energy from urban infrastructure.
The ask
Design and install prefabricated solar-generating surface panels for dedicated cycle lanes and pedestrian paths, selling the electricity generated to municipalities or adjacent buildings under a 20-year energy services contract.
Why now
Solar panel cost has fallen 90 % since 2010; the remaining barrier to road-surface solar is the protective overlay, which has dropped to USD 80–120/m² in recent Chinese pilot deployments. Several French (Wattway), Dutch (SolaRoad), and Chinese installations have generated 10–15 years of performance data sufficient to underwrite a power-purchase agreement. Bangladesh has a National Cycling Plan (2021) identifying 500 km of dedicated cycle infrastructure in Dhaka and secondary cities.
Why Bangladesh
Bangladesh averages 5.0–5.5 peak sun hours per day — among the highest in South Asia — making road-surface yield commercially viable in a way that cloudy European pilots are not. New Dhaka BRT corridors and the Rajshahi-Chapai cycling belt have dedicated lanes that will be built regardless; a developer who bids into that procurement wins a 20-year revenue stream at near-zero land cost. The cycle-path canopy variant (panels over, not in, the path) eliminates the traction and durability objections entirely.
As a business
The company acts as a project developer: designs the system, sources panels, manages installation, and sells electricity at a power-purchase agreement rate to the municipality or adjacent commercial properties. Capital is raised project-by-project via green bonds or development-bank financing (ADB, IDB). Revenue is predictable (20-year PPA); cost is panel degradation and maintenance. The developer earns a project development fee (8–12 % of capex) and a long-run O&M margin.
Economics
Move the sliders to model your own solar cycle-path project. Defaults are order-of-magnitude estimates — pressure-testing them is part of what a founder pitches us.
Model a solar cycle-path installation
Does not break even within 5 years at these inputs — adjust the sliders. Hover or tap the chart for any month.
Illustrative model — defaults are order-of-magnitude estimates from public data, not a forecast. Pressure-test every number before you build.
What ZEPH would back
A project-developer founder with a signed MOU from a Bangladesh city corporation for a 1–3 km pilot lane, and a costed technical proposal ready for green-bond financing. The technology risk is low; the bankability risk is the Bangladesh municipal procurement process — a founder who has navigated that to a signed document is fundable.
Impact
A 5 km × 2 m solar bike path (10,000 m²) generating 160 kWh/m²/yr produces 1.6 GWh/yr of electricity, displacing approximately 1,250 tCO₂e versus Bangladesh's grid. The primary FX benefit is in displaced LNG generation: at $0.024/kWh avoided, the path saves roughly $38,000/yr per 5 km section in fuel import costs. Urban cycling infrastructure also delivers modal-shift co-benefits — reducing motorcycle and auto-rickshaw trips — that multiply the effective carbon impact per unit of civil investment.
Also being built elsewhere
Companies proving the model in other markets.
French road-surface solar product with pilot deployments in Normandy; first commercial solar road, now with 15 years of performance data.
China's first solar-panel highway pilot section that recharges EVs — government-backed proof of concept in a comparable high-irradiance climate.
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