BYD B-Plus L 3.5kWh LV Battery Unit


3.5kWh 48V LV Battery Unit, IP55

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The BYD B-Plus L battery unit is designed specifically for flexible on-grid and grid-back-up storage applications.

It can be easily 'stacked' to build storage systems as small as 3.5kWh and as large as 14.0kWh.

Up to 3 'stacks' may be connected together to enable storage capacities as high as 42kWh!


The IP55 rated blocks are extremely simple to install and are ideal for installation both indoors and outdoors.


About the BYD B-Box

Safe Battery Chemistry

The BYD Lithium Iron Phosphate (LFP) chemistry is recognised as one of the safest Lithium chemistries currently in use.

Safe Battery Construction

Built with the same battery modules as BYD's Electric Vehicles gives these 'stationary' battery systems the durability of devices designed for motive and high vibration applications.

Usable Energy Ratio

With smart design the Battery-Box can deliver a usable energy ratio of 96%!

Easy Installation

The Battery-Box systems have been carefully designed to simplify installation. The modular nature of the system components means they can be installed quickly and easily.

Flexible Extension

The modular design also allows for flexible expansion of system sizes over the whole lifetime of the system!

Natural Cooling

Using natural convection cooling allows the Battery-Box to achieve the highest system efficiency as well as enabling operation without the noise of fans or pumps.

Nominal battery voltage (DCV) 51.2V (per block)
Storage Capacity 3.5kWh (per block)
IP Rating IP55
Weight 43.00
Dimensions mm 620 x 240 x 380 mm
Warranty 10 years (conditions: residential applications, online monitoring, site registration)

PDF Downloads


Battery-Box LV Guides





  • BYD B-Plus LV Firmware
  • BYD B-Plus LV Firmware Update Instructions


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