Battery Modules – Expandable, Reliable and Ready for the Future

Battery modules are the heart of any modern energy storage system. Whether you’re upgrading your portable power station, building a home battery setup, or expanding a hybrid inverter installation – the right battery gives you greater capacity, longer autonomy and full control over your energy use. At Off Grid Supply, we offer a wide selection of plug-and-play LiFePO₄ batteries that are modular, safe and built to last.

Our batteries feature durable LiFePO₄ (Lithium Iron Phosphate) chemistry, offering up to 6,000 life cycles. They are maintenance-free, designed for indoor and outdoor use, and compatible with top brands like Bluetti, Marstek, Pylontech and Solis hybrid inverters.

When do you need a separate battery?

• Expanding capacity: Already own a system? Add more batteries to increase storage.
• Building modular setups: Start with 5 kWh and grow to 10–20 kWh or more over time.
• Redundancy or replacement: Keep a spare unit on hand or replace old/degraded modules.

Popular battery modules at Off Grid Supply

• Pylontech US3000C – 3.7 kWh module, ideal for home systems and compatible with Solis & Victron.
• Marstek Venus E – 5 kWh plug-and-play battery, expandable up to 20 kWh. No installation required.
• View all battery modules in our energy storage collection.

Advantages of LiFePO₄ batteries

• Safety: No risk of fire or explosion, even under heavy load or high temperatures.
• Longevity: Up to 6,000 charge cycles – more than 10 years with daily use.
• Deep discharge: Up to 90% usable capacity without degrading battery life.
• Compact & silent: No moving parts or noisy ventilation systems required.

Our batteries are suitable for home energy systems, off-grid cabins, RVs, mobile workshops or commercial backup setups. They can be paired with a Solis hybrid inverter or connected to a modular system from Bluetti or Marstek.

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