Billion Energy Independence

Solar-Plus-Storage Microgrid Solution

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Innovative Solar Energy Storage

A Greener Future

How Solar, Storage, and EV Charging Work Together for Energy Independence

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.


Discover Billion's Solar Energy Storage Microgrid Solution – integrating solar, battery storage, and EV charging for maximum energy independence and cost efficiency. Ideal for businesses and island nations.

Enhance renewable energy usage

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On-grid operation

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Solar-Plus-Storage microgrid

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Stabilize self-sufficient power

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FAQs

What is a solar-plus-storage microgrid?
A solar-plus-storage microgrid integrates solar panels, battery storage, and intelligent energy management to reduce grid dependence and ensure reliable power.
How does Billion’s microgrid solution benefit businesses?
Billion's microgrid reduces electricity costs, ensures energy security, and supports sustainability goals.

Innovative Solar-Plus-Storage Systems for Sustainable Energy Use

As climate change intensifies and energy costs continue to rise, Pacific Island countries are facing severe energy supply challenges. Billion Group implemented innovative solar-plus-storage microgrid solutions in Palau, the Marshall Islands, and Tuvalu to achieve energy independence and low-carbon development, setting a successful benchmark for energy transition in island countries.

Challenges

  • The dispersion of the islands makes it difficult to transmit power and deploy the system.

  • 97.5% reliance on imported diesel leads to high costs and significant carbon emissions.

  • Hurricanes, rainfall, and high temperatures threaten energy facilities.
  • Saline environments can cause equipment corrosion and failures, increasing maintenance costs.

  • Lack of skilled engineering, procurement, and construction (EPC) teams, affecting the efficient implementation of the project.
  • Insufficient infrastructure in remote areas limits the transportation and installation of large equipment.

Solutions

  • Modular systems tailored to remote islands’ infrastructure conditions
  • Introduce remote monitoring technology and localized installation design to reduce on-site manpower dependence.

  • Deploy efficient energy storage systems to reduce fuel use and ensure stable power supply.
  • EMS intelligently regulates the matching of solar energy and storage, reduces the proportion of diesel and electricity used, and improves the energy efficiency of the system.

  • Corrosion-resistant materials (e.g. 304) and waterproof design improve the durability of the equipment.
  • Strengthen infrastructure improves stability under extreme weather conditions.

  • Develop remote management to support real-time operation and troubleshooting via cloud monitoring, reducing reliance on local teams.
  • Equipment selection is based on high durability and the ability to adapt to extreme environments, reducing the need for maintenance and ensuring stable system operation.

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Billion and Billion Watts’ engineering teams have the ability to plan independent microgrids, integrate photovoltaics and energy storage, and overcome the common mutual exclusion of photovoltaic and storage integration. The disturbance caused by the weather (sunshine) of solar photovoltaics will make the voltage source established by the off-grid operation of the PCS unstable, and the Billion’s PCS can respond in a very short time and solve the problem perfectly.

Additionally, the EMS controls the output power of PV inverters and adjusts it dynamically based on battery capacity. The EMS control will match the application of solar power generation and PCS to achieve optimal operation. Billion and Billion Watts’ strength lies in tailoring solutions to customer requirements and applications, delivering the most comprehensive and well-considered plans.

Product Director of Billion Group, Mr. Alex Hsieh

 Overall Construction Scale

Highlights & Solutions

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 storage battery supply the load (the battery is prioritized, with grid power used only when the battery 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. 

Independent Solar-Plus-Storage Microgrid

(Off-Grid)

Independent solar-plus-storage microgrid delivers stable, self-sufficient power to the entire area


  • PCS Parallel Connection: Through PCS parallel, the solar storage microgrid can be separated from the power company to build an independent power system to provide a stable supply for the load.
  • Dynamic Power Adjustment: The EMS (Energy Management System) dynamically adjusts PV inverter output based on battery capacity. Excess energy is stored in the battery when generation exceeds load demand, and the storage system supplies power when generation is insufficient.
  • Maximize Power Generation Efficiency: The built-in MPPT of PV inverters continuously tracks the maximum power point, ensuring optimal efficiency.
  • Bidirectional Charging and Discharging: Supports DC & AC bidirectional charging and discharging, allowing excess power to be stored flexibly for stable supply during nighttime or low sunlight conditions.

Case Studies

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 - Tuvalu

Creating Self-Sufficient Energy for Farmers

Faced with multiple challenges such as extreme weather, insufficient infrastructure and high cost of electricity. Billion provided flexible and efficient solar-plus-storage solutions to ensure reliable energy for smallholding loads and residents' urgent power needs.

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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