BYD · 2.56kWh modules
BYD Battery-Box Premium HVS
A widely-installed modular high-voltage battery that stacks from 5.1kWh to ~22kWh, paired with a third-party hybrid inverter.
B4.3 ~£4,500
Specs & review
Modular Battery Storage
Modular batteries are stackable packs that pair with a separate hybrid inverter — start small and add capacity later. Often the most cost-effective route, especially when retrofitting alongside existing solar. Compare usable capacity, max expansion, power and warranty.
Fox ESS · ECS2900
Fox ESS ECS Cube
Stackable high-voltage battery modules letting you size storage from ~2.9kWh up to ~16kWh.
B4.2 ~£1,850
Specs & review
SolaX Power · 5.8kWh modules
SolaX Triple Power T58
High-voltage modular battery that stacks to ~46kWh and integrates tightly with SolaX hybrid inverters for a single-vendor system.
B4.2 ~£3,500
Specs & review
Pylontech · US5000
Pylontech US5000
Popular 4.8kWh LFP module designed to stack (up to ~16 units) for low-voltage hybrid inverter systems.
B4.1 £1,150
Specs & review