SiRay Energy delivered a comprehensive PV + BESS + Diesel microgrid system for a luxury tropical island resort in Southeast Asia. The project transforms abundant tropical sunshine into reliable 24/7 power, eliminating dependence on expensive diesel-only generation while maintaining seamless backup capability during monsoon weather.
Project Overview
Nestled on a pristine tropical island surrounded by turquoise waters, this luxury resort previously relied entirely on diesel generators for all electricity needs. With over 580 kW of peak load demand across guest villas, restaurants, water sports facilities, and back-of-house operations, the resort faced escalating fuel costs, noise pollution, and environmental concerns that threatened its eco-luxury brand positioning.
The client sought a turnkey renewable energy solution that leverages the island's abundant sunshine while preserving diesel backup for extended rainy periods.
- 580 kWPV installed capacity
- >1 MWhBESS capacity
- 2+Diesel gensets
- 24/7Stable power supply
Solar Photovoltaic System
The resort features extensive rooftop photovoltaic arrays covering multiple buildings, from guest villas to the main facilities. Additional solar capacity was deployed near the waterfront to capture unobstructed tropical sunlight.
Energy Storage & Backup
Containerized BESS
Over 1 MWh of lithium-ion battery storage housed in climate-controlled containers, providing hours of autonomous operation.
Diesel Backup
Multiple high-efficiency diesel generator sets serve as reliable backup during extended cloudy periods.
PV Inverters
Centralized inverter room converts DC solar power to AC, with multi-channel MPPT optimization.
Power Distribution
The microgrid interfaces with the resort's existing electrical infrastructure through dedicated transformers and low-voltage switchgear. Two large power transformers step down voltage for distribution to all resort loads.
Intelligent EMS Control
At the core of the system is an advanced Energy Management System (EMS) featuring a touchscreen HMI interface that provides real-time SCADA visualization. The system monitors PV generation, battery state-of-charge, diesel generator status, and load demand, automatically optimizing dispatch to minimize diesel runtime.
The EMS supports automatic mode switching between grid-tied, island, and backup modes. When solar generation exceeds resort demand, excess energy charges the battery. During evening hours or cloudy weather, the battery discharges to power the resort.
Key Achievements
- Delivered 580 kW of solar PV across the entire island resort complex.
- Installed over 1 MWh of containerized battery storage for autonomous island operation.
- Reduced diesel fuel consumption by 50-70% through intelligent PV-priority dispatch.
- Achieved seamless 24/7 power supply for all guest and operational facilities.
- Integrated remote monitoring and automated genset scheduling via EMS touchscreen.
- Containerized design enabled rapid deployment with minimal civil works on the island.
This project is also documented as a reference case: Tropical Island Resort microgrid case