China-headquartered BYD has launched the latest iteration of its B-Box battery energy storage systems, including a high voltage model, into the European market.
The renewable energy systems, battery and automotive maker, with financial backers including Warren Buffet, announced the launch of B-Box HV (high voltage) this week, designed for use in commercial and residential energy storage installations. This sits alongside the existing low voltage model which is suitable for residential use only.
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According to BYD’s global sales director Julia Chen, B-Box can be configured for single or three-phase applications and can meet light or heavy load usage in on-grid and off-grid settings.
“The modular design of the solution enables private and corporate users to switch to a fully sustainable utility-independent energy solution with a small storage investment while having full scalability to adapt the storage volume to future developments such as integrating electrical vehicles,” Chen added.
The company claims B-Box HV is a direct high voltage energy storage solution using serial connection of battery cells and says this is an industry-wide first. Existing solutions favour a low-voltage battery paired with a DC-DC converter. Using higher voltages, of the type used typically in PV systems and by the grid, means that theoretically conversion losses are minimised.
B-Box HV is available in 5.6kWh to 10.08kWh configurations and is scalable to 50kWh for commercial and industrial (C&I) users. BYD said it supports 1C and 2C discharging rates for peak power output with a usable capacity ratio of 96%.
BYD also produces the low voltage B-Box LV Professional 10.0, from 2.5kWh to 10kWh, scalable to 80kWh, while another model, the B-Box LV Professional 12.8 can reach a maximum 409kWh. B-Box is made with lithium iron phosphate batteries and the same control technology used in BYD’s EVs. The systems come with 10-year warranties.