HB Series stacked LiFePO4 battery, 5.12–16.08 kWh

Storage that arrives in stages

Most residential storage is bought twice: once when the system is installed, and again when the family adds an EV or a heat pump. The HB is built around that second purchase. Every stack position carries the same 51.2 V busbar, the same BMS addressing scheme and the same case footprint per capacity class, so adding a module is a mechanical operation rather than a redesign.

Stack geometry and cable routing

Modules sit on a steel base with anti-slip pads; the inter-module busbar is bolted behind a removable cover, and the DC output is taken from the bottom module. Keep the stack against a wall for stability and leave 200 mm above the top module — the terminal cover hinges upward.

Because the stack is floor-standing, the load path goes into the floor rather than the wall. On a suspended timber floor, put the stack over a joist or a spreader plate; 234 kg concentrated on four feet is not a problem on a concrete slab and is a problem on a floating floor.

BMS behaviour in a stack

The master module polls the slaves over an internal bus, sums the state of charge and presents a single battery to the inverter. If one module goes offline — a cell group out of balance, an over-temperature, a loose busbar — the master reports reduced capacity rather than dropping the whole string, which keeps the site running until someone attends.