Hotel Parking Solution
As global attention towards sustainable transportation grows, particularly in California—a pioneering region for green mobility—more hotels are considering the installation of electric vehicle (EV) charging facilities to attract and serve EV-driving guests. A luxury hotel in California plans to install two 240kW fast chargers in its parking lot, aiming to provide convenient and efficient charging services for its EV-owning guests. This initiative not only enhances the guest experience but also highlights the hotel's commitment to environmental sustainability.
Project Overview
Available Only Through Renon Power
Power Supply Challenge
Innovating Beyond Limits for Uninterrupted Charging!
The hotel faces a significant challenge as the local grid can only supply a maximum of 200kW, far below the 480kW required for both fast chargers to operate simultaneously. Upgrading the grid or replacing transformers would involve high costs and complex procedures. Therefore, finding an innovative solution to avoid overloading the existing grid is crucial for seamless operation.
Solar and Energy Storage Integration
Harnessing Clean Energy for a Sustainable Stay!
The hotel has an additional requirement: installing approximately 240kW of solar panels on its rooftop and over the parking area to achieve partial energy self-sufficiency and reduce its carbon footprint. The project aims not only to address the power needs of the chargers but also to integrate a solar system, maximizing the use of clean energy.
Battery Energy Storage System (BESS)
Powering Peak Performance with Smart Energy Storage!
To tackle the power supply challenges, the project will implement a Battery Energy Storage System (BESS). During off-peak hours, the grid and solar system will charge the batteries, while during peak demand, the batteries will supplement the grid, ensuring the chargers can consistently deliver 480kW output even at full capacity. The battery system is designed to provide at least three hours of peak support, accommodating most guests charging needs efficiently.
Integrated Solar, Storage, and Charging Solution
Smart Integration for Sustainable Power Anytime, Anywhere!
Optimized Power Management: Combining solar, battery storage, and fast EV chargers to tackle grid limitations and ensure uninterrupted, high-power charging.
Energy Independence: Install 240kW of solar panels to generate clean energy, reduce carbon footprint, and achieve partial self-sufficiency.
Advanced Storage Capability: A robust BESS provides at least 280kW of support during peak hours, ensuring reliable operation of the charging stations while maintaining safety and seamless compatibility with all systems.
Smart Energy Management and Monitoring System
Optimize, Monitor, and Maximize Your Power!
To ensure optimal performance, the system features an advanced energy management system that intelligently adjusts charging and discharging strategies based on grid status, solar output, and charging demand, prioritizing clean solar energy use. Equipped with remote monitoring capabilities, the system provides real-time oversight of all components, enabling quick issue identification and resolution to minimize downtime and maintain high availability.
Project Goals
Charging Towards a Sustainable Future!
The goal of this integrated energy solution is to create a sustainable and efficient charging infrastructure that not only meets the charging needs of hotel guests but also promotes the use of clean energy. By reducing dependence on the traditional grid, this project aims to lower operational costs, enhance the hotel’s competitiveness, and strengthen its brand image. Ultimately, it contributes to green mobility in California and beyond, setting a standard for sustainable practices worldwide.
Core Component Selection
Renon Power Specialization
Battery System Selection
Selection: 4 x 240kWh Lithium Battery Energy Storage Systems.
Rationale: Each energy storage system provides 240kWh capacity. To meet the total requirement of 840kWh during 3 hours of peak demand (including efficiency losses), we selected four such systems, totaling 960kWh. This configuration ensures stable and continuous auxiliary power supply even during high-demand periods.
Charging Power: Each system offers a charging power of 125kW, allowing efficient energy absorption from the grid during off-peak hours for storage in the batteries.
Advantages: Lithium batteries are ideal for this application due to their high energy density, long lifespan, and rapid response capabilities. They can withstand frequent charge and discharge cycles while maintaining high efficiency, making them perfect for high-demand scenarios.
PCS (Power Conversion System) Power Configuration
Selection: 125kW Power Conversion System (PCS) with Integrated MPPT.
Rationale: The PCS is configured at 125kW to match the charging and discharging requirements of each energy storage system, ensuring efficient interaction with the grid. This configuration supports optimal power flow management, enhancing overall system performance.
Integrated Solar MPPT Function: Each battery system includes a 60kW Maximum Power Point Tracking (MPPT) function for solar energy, allowing direct energy input from the solar array without additional conversion equipment. This integration simplifies system architecture and enhances operational efficiency.
Advantages: The integrated PCS with MPPT not only maximizes the use of renewable energy but also reduces system complexity and maintenance costs, making it a highly efficient and cost-effective solution.
Fast Charging System Selection
Selection: Estand Integrated Unit with 240kW Dual-Gun Charger.
Rationale: Each Estand unit is equipped with a 240kW dual-gun charger, capable of simultaneously providing high-speed charging services to two electric vehicles. This configuration ensures that the charging needs of multiple guests are met efficiently.
Advantages: The high-power output combined with the dual-gun design offers a fast and efficient charging experience, maximizing the utilization of each charging station and meeting the high demand of hotel customers.
The interconnected management of battery modules allows for flexible energy allocation, ensuring efficient power utilization and balanced distribution across the system.
Smart Energy Management System
Equipped with a built-in smart energy management system, the solution adjusts charging and discharging strategies based on real-time electricity price signals, prioritizing charging from the grid during low-cost periods.
Intelligent Energy Absorption and Storage
This solution integrates a battery energy storage system that intelligently absorbs energy from the grid and solar system during off-peak hours, storing it for use during peak demand periods. This approach effectively smooths the power demand curve, reducing instantaneous power demand on the grid.
System Advantages
Enhanced System Performance and Flexibility
This intelligent and coordinated operation improves the overall utilization and lifespan of the battery modules, while also enhancing the system’s response speed and flexibility to meet diverse charging needs in different scenarios.
Cost-Effective Charging
By prioritizing charging during low electricity price periods, the system significantly reduces charging costs, enhancing the economic efficiency of the charging stations and saving customers on electricity bills.
Reduced Peak Power Demand
By lowering peak power demand, the system eases the load on the grid, avoiding the high costs associated with grid upgrades while enhancing overall grid stability.
