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Performance & Value

Battery-Box Premium HVS

5.12–12.8 kWh · LFP · DC-coupled

BYDReleased 2021

75/ 100

Superior

Global

LFP100% UsableHigh Power 10kW+VPP-Ready

The verdict. In our Performance & Value class, BYD Battery-Box Premium HVS leads on capacity & usability. Home-battery reliability is rarely independently verified, so judge on chemistry, safety certification and the backing company.

3rdof 24 in Performance & ValueTop 10%class average 66.7
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The assessment

How it scores, by category

Capacity & Usability92
Power & Efficiency91
Longevity (verified)59
Safety & Chemistry73
Guarantee & Backbone92
Energy Ecosystem57

Market position

3rdof 24 in Performance & ValueTop 10%
547581

Our reading

Battery-Box Premium HVS scores 75, placing 3 of 24 in the Performance & Value class against a class average of 66.7. Its strongest scoring dimension is capacity & usability (92), above the class average of 88. Energy Ecosystem (57) is the dimension with the most room to move. Key specifications: LFP, 96% round-trip efficiency, 10.2 kW continuous output.

The data

Chemistry
LFP
Power
10.2kW
Round-trip
96%
Cycle life
Not recorded

Capacity guarantee: minimum retained at year 10

10.2 kWhfull6.1at yr 10
5060708090100Rated capacity 100%Guaranteed floor 60.0%60.0%0yr2yr4yr6yr8yr10yr
Rated capacity (reference)Guaranteed floor: 60.0% at yr 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

76 / 100#9 of 32 batteries
fleet low 46median 68fleet high 92
No backupGrid-forming

Whole-home (via hybrid inverter)

Continuous power
10.2kW
Switchover
<20ms (seamless)
Surge / motor-start
Surge rated
Off-grid solar recharge
Yes, documented
AC terminal protection
Not specified

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.

Before you buy

Two things to check

Local positionUse a market view to check local availability, approvals and warranty scope.

Ask the installer: What usable capacity, backup power and warranted operating conditions will the installed Battery-Box Premium HVS configuration deliver?

Verification & sources

Market context

Global benchmark. This scorecard is benchmarked globally. A global score does not imply local availability, certification, warranty coverage, or installer compatibility.

Benchmark anchor. Capacity range describes supported configurations; the score remains anchored to the reviewed reference configuration, not the largest stack. Scored model: Battery-Box Premium HVS 10.2 · checked 2026-06-16. Evidence.

Sources & references · checked 2026-06-16

Strong evidence coverage

18 of 29 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.

Help strengthen this record

These are published evidence gaps, not private submissions. A source is reviewed under the same methodology whether it comes from a reader, installer or manufacturer.

View the open evidence register

Evidence timeline

Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots.

  1. AU market evidence checked
  2. US market evidence checked
  3. Core scorecard evidence checked
  4. Series benchmark source checked
  5. Plain-language warranty summary 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.