CASE STUDY

Success Story - Tuvalu

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Innovative Solar Energy Storage

A Greener Future

Creating Self-Sufficient Energy Solutions for Smallholdings

Smallholdings loads and emergency power needs, ensuring 24-hour electricity supply

Tuvalu, one of the smallest and most fragmented countries in the Pacific Islands, faces multiple challenges of extreme weather, poor infrastructure and high electricity costs. Billion Group provided flexible and efficient solar-plus-storage solutions to ensure reliable energy for smallholding loads and residents' urgent power needs.

Project Background

Tuvalu has long relied on diesel power generation, but the geographic dispersal of the islands and resource transport limitations have resulted in high generation costs and significant carbon emissions. As part of the Pacific Islands Green Energy Plan, Tuvalu urgently needs a cost-effective, low-carbon, and efficient energy solution to address infrastructure constraints and improve energy sustainability.

Challenges

Load requirements: refrigerated cabinets, water pumps, fans, lights, etc.

  • As a small island country, Tuvalu heavily depends on diesel power generation, resulting in high fuel costs and unstable supply.
  • Long-term power outages and unstable power supply have affected the daily lives and business activities of local residents.

  • Island regions face extreme climate challenges, which place stringent demands on the stability and durability of the power system.
  • Need to build durable and efficient energy solutions.

  • Unstable power supply for agricultural facilities affects critical needs like irrigation, refrigeration, and lighting.
  • Lack of energy storage equipment to provide stable power at night or in severe weather.
  • The local government is committed to reducing carbon emissions and promoting the integration of renewable energy and energy storage technologies.

Solution

Integrated Solar-Plus-Storage System

(On-Grid)

Dynamically adjust the power system at any time to optimize electricity costs and resource utilization.


  • Efficient Power Storage: Solar PV > Load, the load is powered by solar energy, with excess electricity charging the storage battery.
  • Intelligent Backup: Solar PV < Load, both solar power and the energy storage battery supply the load (the battery is prioritized, with grid power used only when the battery capacity is insufficient).
  • Pure Energy Storage Power Supply: Solar PV does not generate electricity and the battery capacity is sufficient, and the load is supplied by the energy storage battery.
  • Grid Support and Energy Storage Charging: Solar PV does not generate electricity and the battery capacity is insufficient, and the grid powers the load and optionally charges the battery as per scheduled settings.

Solar-Plus-Storage System

Funafuti Farm

Build green energy, achieving 100% renewable energy ratio


  • Solar PV Capacity - 10.92kWp 
  • Energy Storage Capacity - 19.8kWh
  • Equipment Used- PS20 Residential/Commercial Energy Storage System (1 Unit)
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Results

Satisfy the energy needs of smallholdings loads and emergency power demands, ensuring 24-hour power supply.

The implementation of the solar-plus-storage solution successfully addressed Tuvalu’s energy supply issues, achieving both economic and environmental benefits. This not only improved local living standards but also set a benchmark for sustainable energy transitions, serving as a model for other small island countries.

The integrated solar-plus-storage system combines solar power generation with energy storage technology to deliver stable, efficient, and all-weather energy supply.

  • Stable Power Supply: Provides continuous and stable electricity, addressing frequent power outages.
  • Efficient Management: Optimizes energy distribution and real-time monitoring through the smart energy management system.
  • Environmental Adaptability: Durable design and high safety to adapt to the extreme climatic conditions of Tuvalu.
  • Scalability: Supports flexible expansion to meet future energy demand growth.


High Performance and Safety Assurance

  • The ESS uses LiFePO4 batteries, offering high safety and long lifespan.
  • Supports IP65 protection standards, ensuring stable operation under severe climate conditions.

Energy Conservation and Emission Reduction

  • Reduce reliance on diesel power generation and reduce carbon emissions while increasing local energy independence.

Case Studies

Solar Energy Storage Microgrid Solutions

Empowering Pacific Island Countries to Achieve Energy Revolution

The integrated solar storage system converts sunlight into electricity, stores excess energy, monitors power generation, and discharges electricity when needed, reducing dependence on the power grid.

Success Story - Palau

Self-Sufficient Energy and

Efficient Utilization

Palau has long relied on imported diesel for power generation, which has high electricity prices and serious carbon emissions. Agriculture, fishery facilities and residential electricity demand are diverse, and there is an urgent need for a stable and sustainable supply of green energy.

Success Story - Marshall Islands

Green Energy Transition

in Saline Environment

The Marshall Islands has long relied on imported diesel power generation, with high energy costs and unstable supply, and transited to renewable energy and utilize solar power as an alternative, which becomes the key to achieving sustainable development.

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