Reliable Power in Challenging Conditions: GSL ENERGY’s 20kWh Storage Solution in the Philippines

In July 2025, GSL ENERGY successfully installed a 20kWh home energy storage system (model GSL-A51-100) in the Philippines, paired with a Solis inverter.    This installation highlights the growing role of energy storage technologies in regions grappling with persistent grid instability.

The Growing Energy Crisis in the Philippines

In recent years, the Philippines has faced increasingly severe power supply challenges.    During the peak summer months, key regions such as Luzon and the Visayas frequently experience supply shortages and rotational brownouts.    Factors such as aging thermal plants, the depletion of domestic natural gas reserves (e.g., the Malampaya gas field), and the slow expansion of renewable energy have further worsened the situation.   While Mindanao currently maintains a more stable reserve margin, the national grid urgently requires reinforcement through integrated strategies, including energy storage deployment, grid interconnection, and accelerated renewable development.

The GSL-A51-100 lithium battery from GSL ENERGY is purpose-built for residential energy needs.    Offering both stackable and wall-mounted configurations, it allows homeowners to choose installation formats that best fit their available space.    In this project, the units were installed side-by-side against an exterior wall, utilizing minimal ground space while still providing robust storage capacity.

The setup environment was particularly rough—dust, uneven ground, and high humidity levels posed clear risks for sensitive equipment.Yet the GSL-A51-100 system maintained full operational stability, a clear testament to its rugged design and strong IP-rated casing.

Built on LiFePO4 (lithium iron phosphate) chemistry, the battery is not only safer than traditional lithium-ion options but also delivers over 6000 cycles of use.With support for up to 16 units in parallel, homeowners can scale their system to over 80kWh—perfect for homes with higher energy consumption or backup requirements during prolonged grid interruptions.

The Solis inverter, paired with the GSL-A51-100 home storage battery, plays a critical role in managing and optimizing the home’s energy flow. Converting the DC power stored in the batteries into AC power for household appliances, Solis is known for its efficiency rates above 98%, customizable energy modes, and intelligent monitoring systems.

In this project, the inverter seamlessly integrated with the GSL battery, enabling dynamic power allocation based on solar generation, home demand, and grid availability.   It can charge the batteries during periods of excess solar production or low-cost grid electricity, and discharge during expensive peak hours—reducing electricity bills and improving energy independence.

In areas like the Philippines where blackouts are frequent, the inverter’s rapid switchover to battery power ensures uninterrupted electricity, safeguarding daily life and essential appliances.

A Step Toward Energy Resilience in Southeast Asia

This successful residential deployment reflects GSL ENERGY’s broader mission: to deliver scalable, sustainable, and reliable power solutions in markets where energy instability is a daily challenge.  For Filipino homeowners, the combination of GSL’s GSL-A51-100 battery and Solis inverter translates into:

Reliable backup power, protecting against grid failures
Lower electricity costs, thanks to intelligent energy scheduling
Eco-friendly operation, through better use of solar energy
Easy expansion and installation, with modular designs and remote monitoring

As clean energy adoption grows across Southeast Asia, GSL ENERGY continues to support energy transition goals with proven technology and real-world performance.    This installation is one of many steps toward ensuring that even the most challenging environments have access to clean, stable, and efficient energy.