Anker Expansion Batteries are designed for users who have outgrown the capacity of a single portable power station and need a reliable, modular way to extend runtime without replacing their entire system. This collection features officially branded Anker batteries, offered through our store for users who need to extend the capacity of compatible Anker SOLIX power stations without upgrading their core system.
Whether you’re preparing for longer outages, building a solar-ready backup system, or powering mobile workstations, RVs, or off-grid setups, these batteries allow you to scale your power on demand, safely and efficiently.
Unlike conventional lithium batteries, these expansion modules use LiFePO4 (LFP) chemistry, chosen specifically for long service life, thermal stability, and consistent performance under daily use.
Key advantages include:
3,000+ charge cycles with minimal capacity loss
Up to 10 years of practical lifespan for backup and solar applications
Improved safety compared to standard lithium-ion batteries
Stable performance across a wide range of operating conditions
This makes them suitable not only for emergencies, but also for routine energy storage, solar buffering, and daily load shifting.
Anker expansion batteries are built to work as dedicated capacity modules, not standalone power stations. They connect directly to supported Anker SOLIX systems using manufacturer-approved expansion ports, ensuring:
Automatic recognition
Balanced charging and discharging
No external wiring or configuration
Clean integration with existing power stations
You can add one or multiple units (depending on system support) to incrementally increase total stored energy — a practical alternative to oversized, all-in-one solutions.
This collection is ideal for customers who need more than temporary backup:
Home backup power during extended outages
Solar generator systems with expandable storage
RV and vanlife setups requiring longer off-grid autonomy
Mobile professionals running tools, servers, or equipment
Energy resilience planning without installing fixed home batteries
Expansion batteries allow you to store more energy when it’s available and use it when it matters most.
All Anker expansion batteries in this collection are designed to operate as part of a solar-compatible power ecosystem. When paired with an Anker SOLIX power station and compatible solar panels, they support:
AC wall charging
Solar charging via the base station
Intelligent charge management and battery protection
This flexibility makes them suitable for both grid-tied backup and fully off-grid operation.
Official Anker compatibility — no third-party risk
LFP safety and longevity for long-term ownership
Expandable architecture that grows with your needs
Clean, plug-and-play installation
Trusted brand support and warranty coverage
All products are genuine Anker accessories, sold through our store and backed by official manufacturer warranties.
Instead of replacing your power station as your energy needs grow, expand it intelligently. Anker Expansion Batteries give you the flexibility to adapt — whether you’re preparing for emergencies, investing in solar, or simply need more runtime.
Browse the collection and upgrade your Anker SOLIX system with dependable, long-life energy storage designed for real-world demands.
