A large logistics park in Johannesburg, South Africa operates a fleet of electric delivery trucks and requires stable high-power charging services. The park is located in an industrial zone with limited public grid capacity, and cannot support large‑scale EV charging loads. Grid instability, high peak electricity prices and frequent power fluctuations restrict the normal operation of charging stations and fleet scheduling. The park management needs a reliable, low‑cost and green off‑grid EV charging solution to ensure efficient operation of electric trucks.
Location/Time: Johannesburg, South Africa, June 2025
Configuration: PCS: 500kW, BAT: 1500kWh, PV: 600kW, Backup Diesel Generator: 300kW
Load: DC fast charging piles for electric trucks, parking lot lighting, monitoring systems, dispatch center equipment, office electricity
Operating environment: Industrial logistics park, high temperature, strong sunshine, heavy dust, high-power load fluctuation
Operating modes: Off-grid operation, solar energy priority, energy storage for peak shaving and continuous charging support, diesel generator automatic start under continuous rainy days or full‑load charging to ensure 24‑hour uninterrupted EV charging.
The system adopts dust‑proof and high‑power integrated design, with strong impact resistance and high stability. The intelligent energy management platform automatically allocates charging power according to vehicle quantity and battery status, realizing intelligent orderly charging. PV panels are laid on the factory roof, making full use of available space and improving energy self‑sufficiency rate.
Since operation, the charging station has maintained stable and uninterrupted service. Annual energy cost is reduced by 60%, and charging efficiency is increased by 40%. The solution effectively solves the power restriction problem for logistics EVs, reduces operation cost, promotes green logistics development, and becomes a model for low‑carbon intelligent logistics energy systems.
