Guangzhou Ruishu’s intelligent excavator energy-storage power supply solution addresses key on-site power‑supply challenges, including engine start‑up tripping, difficulties in high‑voltage compatibility, and untimely recharging.

Release date:

2025-10-31

Click the blue font above to follow us.

Ruisu mobile charging and storage system: 200A start-up with no worries, plus direct 6kV power supply for excavators, compatible with multiple types of electric excavators.

Core configuration of the solution: Precisely meets the critical power supply needs of excavators.

Are construction sites plagued by power outages when excavators start up, or constrained by limited power supply options? Guangzhou Ruisu Intelligent has developed a custom 3.5 MWh/2.5 MW energy‑storage power solution tailored for excavator operations—fully customizable—and featuring a highly integrated design that combines a 20‑foot energy‑storage container with a step‑up substation. This innovative solution addresses three key challenges: unstable inrush currents during startup, difficulty adapting to multiple voltage levels, and untimely recharging—meeting the demanding requirements of high‑intensity excavation work.

Dual compliance with both capacity and power standards

The system is configured with a 3.5 MWh energy storage capacity and a 2.5 MW bidirectional power converter (PCS), which not only meets the long‑term, continuous power‑storage requirements of electric excavators but also enables precise control of the output current, ensuring that the excavator’s inrush current remains below 200 A and thereby preventing equipment start‑up failures or component damage caused by sudden high currents.

Dual-cabin modular design

The entire system is divided into two core modules: a 20-foot energy storage container housing a complete battery system and a power conversion system (PCS), which handles energy storage, DC‑DC conversion, and off-grid power output; and a step-up substation integrating a 2,500 kVA transformer (0.38 kV/6 kV) and a high-voltage switchgear, specifically designed to facilitate voltage level transformation and accommodate excavators with varying power supply requirements.

Full coverage of multiple voltage outputs

To meet the voltage requirements of mainstream electric excavators on the market, the system offers two core power‑supply modes: ① Off‑grid output of 380 V three‑phase AC, which is precisely stepped up to 6 kV by an onboard transformer and then directly powers 6 kV‑class electric excavators; ② The energy storage cabinet can deliver 600 V DC directly, compatible with DC‑powered excavators.

Technical Strength: End-to-end reliability, from startup to power supply.

As a full‑chain manufacturer of megawatt‑class charging stations, industrial and commercial energy storage systems, and mobile charging‑storage solutions, every design is engineered to ensure the operational stability of electric excavators.

Precise control of inrush current:

• The PCS features dynamic current regulation, enabling real-time monitoring and suppression of current peaks at the moment the excavator starts, ensuring that the current remains consistently below 200 A. This also prevents current fluctuations from imposing stress on the energy storage battery and the excavator’s motor, thereby extending the service life of both systems.

Battery safety features redundancy.

• The battery system utilizes lithium iron phosphate cells and is paired with a dedicated Battery Management System (BMS) that continuously monitors cell voltage, temperature, and state of charge (SOC). It features protection against overcharge, overdischarge, overheating, and short circuits, effectively eliminating safety risks associated with battery operation during excavator use.

Multi-layered safety protection: Ensuring the safety of both people and vehicles throughout the journey.

• During charging, the system performs real-time monitoring of AC-side leakage protection, DC-side insulation detection, and temperature and oil‑temperature sensing at the charging gun connector; any detected anomaly triggers immediate termination of the charging process. Meanwhile, via 4G or Ethernet, the system maintains real-time communication with the monitoring center, enabling remote limitation of the on-board charger’s output power to ensure comprehensive safety.

Flexible Networking: Smarter Management

• Supports 4G or Ethernet connectivity, enabling access to the Ruisu backend and the Yun Kuai Chong platform, while also being compatible with Party A’s proprietary management system — allowing the engineering team to monitor, in real time from the office, each mining card’s charging progress, energy consumption, and associated costs, thus achieving “remote monitoring and intelligent management.”

Technical Strength: End-to-end reliability, from startup to power supply.

As a full‑chain manufacturer covering megawatt‑class charging stations, commercial and industrial energy storage, and mobile energy storage, this excavator‑based energy‑storage power supply solution features core components—battery systems, PCS, transformers, and high‑voltage switchgear—all independently configured and calibrated. Key subsystems are developed and produced in‑house, ensuring end‑to‑end control over quality and delivery timelines. During on‑site installation, Ruisu’s expert team conducts a site visit to fine‑tune the deployment layout based on actual working conditions and coordinates with the excavator to complete power‑supply commissioning, guaranteeing that the system is ready for immediate operation upon energization and providing reliable support for continuous construction activities.