BYDBattery-Box Premium HVM 8.3
The BYD Battery-Box Premium HVM 8.3 is a home battery with usable capacity 8.28 kWh, round-trip efficiency 96 % and cell chemistry LFP.1
Key figures
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SEAI home battery grant
UnknownA €600 grant for home battery storage systems was announced on 29 September 2026 and opens from 6 October 2026, subject to final implementation arrangements. Check SEAI for the detailed conditions before applying.
Technical specifications
| General | |
|---|---|
| Cell chemistry | LFP1 |
| Performance | |
| Usable capacity | 8.28 kWh1 |
| Smallest configuration | 8.28 kWh1 |
| Expandable up to | 66.2 kWh1 |
| Efficiency | |
| Round-trip efficiency | 96 %1 |
| Electrical | |
| Backup power | Yes1 |
| Off-grid capable | Yes1 |
| Dimensions & weight | |
| IP rating | IP551 |
| Min. operating temperature | -10 °C1 |
| Width | 585 mm1 |
| Height | 995 mm1 |
| Depth | 298 mm1 |
| Warranty & lifespan | |
| Warranty | 10 years1 |
Manufacturer documentation
- Product page
- Datasheet / specifications — Battery-Box Premium HVM – datasheet – BCU2.0 V1.0 EN (28.03.2025)
External links to BYD's official website. The manufacturer may change or move documents; where they differ, the manufacturer's latest version applies.
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Frequently asked questions
What is the usable capacity of the BYD Battery-Box Premium HVM 8.3?
The usable capacity of the BYD Battery-Box Premium HVM 8.3 is 8.28 kWh.1
What is the round-trip efficiency of the BYD Battery-Box Premium HVM 8.3?
The round-trip efficiency of the BYD Battery-Box Premium HVM 8.3 is 96 %.1
Which cell chemistry does the BYD Battery-Box Premium HVM 8.3 use?
The cell chemistry of the BYD Battery-Box Premium HVM 8.3 is LFP.1
What is the warranty of the BYD Battery-Box Premium HVM 8.3?
The warranty of the BYD Battery-Box Premium HVM 8.3 is 10 years.1
Sources
- Battery-Box Premium HVM – datasheet, BCU2.0 V1.0 EN (28.03.2025) — BYD Lithium Battery Co., Ltd. · accessed 27 Sept 2026
- SEAI home battery grant — Sustainable Energy Authority of Ireland (SEAI)