Indevolt PowerFlex 4000 Expansion Battery - 4kWh

Take your home energy storage to the next level with the Indevolt PFA4000 Expansion Battery. Designed to work alongside compatible Indevolt PowerFlex systems, this powerful 4kWh battery module provides additional storage capacity, allowing you to store more electricity and reduce your reliance on the grid. Featuring advanced LiFePO₄ battery technology, intelligent BatteryFlex integration and a compact, weather-resistant design, the PFA4000 offers a flexible and reliable way to expand your existing solar storage system. Key Features 4kWh Additional Storage – Adds 4,032Wh of battery capacity to your compatible Indevolt energy storage system. Expandable Energy Storage – Increase your PowerFlex 3000 system's total storage capacity up to approximately 22kWh with additional battery modules. Innovative BatteryFlex Technology – Combine compatible batteries of different capacities within one system for greater flexibility. Long-Lasting LiFePO₄ Battery – Advanced lithium iron phosphate technology designed for up to 10,000 charging cycles. 100% Depth of Discharge – Designed to utilise the battery's full rated capacity, maximising available energy storage. Advanced Safety Protection – Intelligent fault isolation, overvoltage protection and automatic safety shutdown. Compact, Space-Saving Design – High energy density provides substantial storage capacity without taking up unnecessary space. IP65 Weather Protection – Durable enclosure designed to resist dust and water. 10-Year Manufacturer Sold on UKSOL (https://uksol.co.uk/store/p/indevolt-powerflex-4000-expansion-battery-4kwh). The price shown is the retail price on that storefront on 2026-10-31, not a GreenB2B quote or a wholesale price.