Background
Located in the South Pacific, the Solomon lslands relies heavily on imported diesel for power generation, resulting in high electricity costs, especially during peak hours, and an unstable grid prone to outages and voltage fluctuations. Local manufacturing plants face rising operational costs, production interruptions, and safety risks from traditional energy storage systems like lead- acid bateries, which are prone to overheating and short circuits. To address these challenges, we provided a customized commercial and industrial energy storage solution, helping the customer lower energy costs, stabilize their power supply, and enhance overall safety and reliability.
Project Requirements
Reduced Electricity Costs:
The system needed to optimize charging and discharging cycles, storing energy during off-peak hours and discharging during peak periods, to help the customer reduce electricity bills.
Improved Power Supply Reliability:
A stable backup power source was required to ensure uninterrupted operations during grid outages or voltage fluctuations.
Enhanced Energy Utilization:
The customer aimed to integrate solar generation with energy storage to improve energy self-sufficiency and reduce reliance on the unstable local grid.
Increased Safety:
To address safety concerns, the solution had to include a comprehensive fire protection design and real-time system monitoring, minimizing the risk of battery failure or fire.
System Configuration
Battery Storage: 51.2V/280Ah lithium iron phosphate battery pack (7 packs in series,14.3kWh per pack, total capacity 100kWh), supporting 0.5C charge/discharge with BMS for real-time monitoring.
Power Conversion: 50 kW bidirectional PCS (AC/DC conversion, seamless grid/off-grid switching ≤20ms, with time-of-use optimization) and 60 kW MPPT solar input.
Energy Sources: 60 kWp high-efficiency solar array (annual generation ≥80000 kWh) plus diesel generator for backup and peak-time support.
System Configuration'Battery Storage:
51.2V/280Ah lithium iron phosphate battery pack (15 packs in series,14.3kWh per packtotal capacity 215kWh), supporting 0.5C charge/discharge with BMS for real-time monitoring.Power Conversion: 100 kw bidirectional PcS (ACc/DC conversion, seamless grid/off-grid switching s20mswith time-of-use optimization) and 120 kW MPPT solar input.Energy Sources: 120 kWp high-efficiency solar array (annual generation 2150000 kWh) plus diesegeneratorfor backup and peak-time support.
System Configuration
Battery Storage: 51.2V280Ah lithium iron phosphate battery pack (22 packs in series,14.3kWh per pack, total capacity 315kWh), supporting 0.5C charge/discharge with BMS for real-time monitoring.
Power Conversion: 200 kW bidirectional PCS (AC/DC conversion, seamless grid/off-grid switching ≤20ms, with time-of-use optimization) and 200 kW DC-DC controller (compatible with 120 kW MPPT solar input).
Energy Sources: 120 kWp high-efficiency solar array (annual generation ≥150000 kWh) plus diesel generator for backup and peak-time support.
Design highlights:
Key Functions
Energy Independence: Solar power supplies daytime loads; excess energy is stored, achieving ≥80% solar utilization and reducing grid reliance.
Safety: Multi-level protection with BMS, PCS safeguards, and an automatic fire detection and suppression system.
Diesel integration: Diesel generator offers flexible support, charging during off-peak hours and direct supply during peaks, ideal for unstable grids.
Project Benefits
Energy Savings: Over 20% annual electricity savings, payback within 5 years.
Power Stability: Zero production downtime, improved equipment performance.
Green lmpact: Cuts CO,emissions by ~120 tons/year, supporting sustainability goals.
Trusted Safety: Comform with international standards, ensuring high safety.
Implementation Maintenance
Localized Design: Compatible with 380V ±15% grid fluctuations, equipped for high heat and humidity
OM: Quarterly battery checks, annual solar panel cleaning, and 24/7 remote monitoring and support.
Conclusion
This project, combining solar energy, energy storage, and diesel backup, effectively addresses high costs，unreliable supply, and safety risks. lt delivers real savings, boosts efficiency, ensures safety, and support ssustainability goals, Tailored to local conditions, this scalable solution sets a new standard for green industrial production and provides our customer with a strong competitive edge.
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