Meizhou Bus Station Off-Grid PV-Storage-Charging Project
1. Project Overview
- Background: Responds to the “Dual Carbon” strategy and urban green transportation goals, demonstrating a practical path to decarbonised public transport infrastructure.
- Configuration: 625kW PV array plus 1MWh energy storage system, upgraded from existing PV infrastructure to create a fully integrated solar-storage-charging station.
- Core Model: “PV generation → energy storage → nighttime bus charging” closed loop, delivering 100% off-grid power for the bus depot.
2. Core Transformations
- Energy Attribute: From “grid-dependent power sales” to “100% self-consumption”, solving peak-valley price arbitrage and grid-load constraints at the same time.
- Scenario Adaptation: Matches the buses’ “day operation, night charging” pattern through time-shifted energy supply, eliminating reliance on municipal power for charging.
- Benefits: From a single economic benefit to a triple value of ecology, economy and operational resilience for the public transport operator.
3. Technical Advantages
- Stability: PV-storage synergy eliminates PV intermittency and provides 24-hour reliable power. Meizhou’s >1,100 annual effective generation hours ensure consistent energy yield.
- Low-Carbon: Annual output of ~780,000kWh saves 234 tonnes of standard coal and cuts 640 tonnes of CO2 emissions, equivalent to planting about 35,000 trees.
- Economy: O&M cost is roughly one-fifth of diesel generation. Annual savings exceed 500,000 CNY with an estimated static payback of 6–8 years.
- Flexibility: PV modules use idle roof and shelter space; the modular storage design is expandable and highly replicable across other bus depots and transport hubs.
