BYD Unleashes Gen4 Home Battery with Insane Power Boost and EV Tech Inside

BYD has unveiled its fourth-generation residential energy storage solution, the Battery-Box HVB (High Voltage Blade), at the Smart E trade fair.

The HVB is built around BYD’s Blade Battery format, a lithium iron phosphate (LFP) design noted for its high thermal stability and robust mechanical safety. This is the first time the Blade format, originally developed for BYD’s electric vehicles, has been used in a home battery.

The Blade-based modules allow for substantial gains in energy density. Gravimetric energy density rises to 108.8 Wh/kg, a 49.9% improvement over the previous HVM system, while volumetric density jumps to 162.88 Wh/L, a 139.7% increase.

Modular System, Higher Output

The HVB follows the modular, stackable design familiar from BYD’s earlier HVS and HVM systems. Each 2.97 kWh module weighs 27.3 kg and carries an IP55 rating. A complete stack can include 2 to 10 modules, offering storage from 5.9 kWh up to 29.6 kWh. Systems can also be connected in parallel, up to three stacks, bringing total capacity to 89.07 kWh.

The system delivers 25.6 kW continuous power (at 50A) with a peak output of 50.18 kW (at 98A) for up to 15 seconds.

BYD claims it leads Germany’s residential energy storage market and ranks among the top three in Europe, having shipped over 12 GWh globally. Although pricing and availability for the HVB were not disclosed, the company is expected to focus its initial launch on the European market, particularly Germany, where its presence is already well-established.

HVS and HVM Systems Get a 2025 Refresh

In addition to the HVB launch, BYD announced that its existing HVS and HVM systems will receive a mid-cycle refresh in 2025, rebranded as HVS+ and HVM+. These systems will retain their core battery architecture but gain an upgraded Battery Control Unit (BCU) and improved configuration options. BYD also noted enhancements to its installation app, allowing for one-click setup and easier management.

The Blade Battery’s debut in home energy systems could pave the way for better integration across BYD’s automotive and stationary energy divisions, streamlining production and advancing LFP battery adoption across sectors.