The assessment
How it scores, by category
Market position
The data
DC-coupled battery
Stores DC energy and relies on system power electronics outside the battery product for household AC.
- Product role
- The published battery record covers the storage stack, controller and stated capacity range.
- Published range
- 8.28–22.08 kWh
- Phase
- Not recorded
- Backup boundary
- Installation-specific
What the documents establish
Published evidence, source-reviewed non-disclosure and unresolved questions remain separate from the product score.
Usable capacity
100% of this battery’s nominal capacity is usable, 8.28 kWh in the scored configuration.8.28 kWh usableScored configuration: Battery-Box Premium HVM 8.3. Published range 8.28–22.08 kWh.
No reserve is withheld at the stated depth of discharge.
At a sourced 100% depth of discharge the usable and nominal figures are the same number, so no separate nominal capacity is stated.
Usable capacity sourceDepth-of-discharge source 1Depth-of-discharge source 2Capacity guarantee: minimum retained at year 10
No year-by-year capacity schedule is published for this product - the manufacturer guarantees only this end-of-term minimum, not a specific decline curve. Capacity figure based on the sourced usable capacity of the base configuration; modular systems scale with additional modules.
Blackout protection
72 / 100#17 of 66 batteriesWhole-home (via hybrid inverter)
The blackout score is a standalone benchmark of outage resilience only - it re-weights sourced specs already scored in this product’s pillars (backup tier, switchover, surge strength, backup power, off-grid recharge) and never affects the overall score. Dots show the full battery fleet; the marker is this product.
Verification & sources
Market context
Global evidencechange in the site menu
Global benchmark. This scorecard is benchmarked globally. A global score does not imply local availability, certification, warranty coverage, or installer compatibility.
Benchmark anchor. The range is per tower. The score uses the 8.28 kWh HVM 8.3 reference configuration; up to three towers can be connected in parallel for 66.24 kWh. Scored model: Battery-Box Premium HVM 8.3 · checked 2026-07-27. Evidence.
Australian warranty decision
1 product record
Read the Australian warranty as a claim pathway: the headline term is separate from remedy, labour, freight, site work, transfer and registration conditions.
BYD Battery-Box Premium HVM 8.28 kWh · Home battery
Australian evidence checked 2026-08-07.
Covered7 sources
Australian warranty scope: Australia; the current BCU V2.0 warranty names HVM 8.3, provides a 10-year product term and 70% retained usable energy or 25.62 MWh, whichever performance limit occurs first, for products purchased and installed on or after 1 November 2024.
Structured claim terms: Recorded.
- Term
- 10 yr productStated in the structured comparison
- Product remedy
- ConditionalShenzhen BYD Electronics Co., Ltd. may repair, replace with an equivalent new or previously used part, or provide a partial refund.
- Labour
- CoveredThe warranty does not promise independent installation labour, travel, removal or reinstallation reimbursement.
- Freight
- ConditionalOrdinary claim freight is not an unconditional entitlement. BYD pays reasonable disposal cost only when it requires disposal of a replaced item.
- Removal and reinstallation
- Not coveredRemoval and reinstallation are not promised.
- Transferability
- CoveredCoverage extends to a subsequent owner who acquires the installed product for their own use and provides proof of ownership.
- Registration and conditions
- ConditionalInvoice and system details are required, defects must be notified within 30 days, and performance data must be made available over the internet on request after a claim.
Sources & references · checked 2026-08-07
Strong evidence coverage
30 of 30 scored criteria link directly to a published source.
Values marked estimated, derived, or not found remain visible on the audit sheet and do not carry the same evidential weight as a linked source. Coverage measures direct links, not an independent guarantee that a claim is correct.
- Sourced valuesData card →
- Warranty summary10-year product warranty →
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- Verified reliabilityManufacturer ↗
- Warranty assuranceManufacturer ↗
- Financial strength & warranty backingManufacturer ↗
- Manufacturing track recordManufacturer ↗
- VPP & grid services readinessManufacturer ↗
- Smart home & IoT depthManufacturer ↗
Evidence timeline
Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots.
- Core scorecard evidence checked
- AU market evidence checked
- Plain-language warranty summary checked
- Series benchmark evidence checked
Scored by Solar Analytica Research
Further reading from Signals
Stay across the benchmark.
New scorecards, score changes and market signals, published as they happen.
Our reading
Battery-Box Premium HVM scores 72, placing 6 of 53 in the Performance & Value class against a class average of 64.4. Its strongest scoring dimension is capacity & usability (94), running 8.9 points above the class average on this dimension. Energy Ecosystem (51) is the dimension with the most room to move. Key specifications: LFP, 96% round-trip efficiency, 7.65 kW continuous output.