The assessment
How it scores, by category
Market position
The data
All-in-one energy system
Presents storage and power conversion as one integrated product or product platform.
- Product role
- Battery modules, inverter functions and controls are packaged as one purchasing architecture.
- Published range
- 4.6–27.6 kWh
- Phase
- Three phase
- 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
96% of this battery’s nominal capacity is usable, 9.2 kWh in the scored configuration.9.2 kWh usableScored configuration: BW-INV-TPH10K with two BW-BAT-4.8S modules. Published range 4.6–27.6 kWh.
The remaining 4% stays in the pack as reserve; the home never draws it.
Nominal capacity is not stated here. The usable kWh and the depth-of-discharge percentage are sourced separately, at times from different documents and different module counts, so dividing one by the other would produce a nominal figure no manufacturer published.
Usable capacity sourceDepth-of-discharge sourceCapacity 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#18 of 78 batteriesWhole-home, seamless (<20ms)
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 score uses a two-module 9.2 kWh usable reference configuration rather than rewarding the largest supported six-module stack. Scored model: BW-INV-TPH10K with two BW-BAT-4.8S modules · checked 2026-08-01. Evidence.
Sources & references · checked 2026-08-15
Strong evidence coverage
22 of 22 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.
Record revision. Bytewatt Australian BW-ESS 8-12 kW three-phase datasheet and AU/NZ warranty A7 reviewed 2026-08-01
- Sourced valuesData card →
- Warranty summary10-year product warranty →
Show 2 more
- Archived copy of the primary sourcePDF ↗
- Firmware & security disclosureManufacturer ↗
Evidence timeline
Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots. No change to this product record has been published since the change ledger opened on 2026-08-16.
- Core scorecard evidence checked
- Australian certification source identity verified
- AU market evidence checked
- Plain-language warranty summary checked
- Series benchmark evidence checked
Scored by Solar Analytica Research
Further reading from Findings
Stay across the benchmark.
New scorecards, score changes and market signals, published as they happen.
Our reading
Three Phase 10 scores 67, placing 20 of 63 in the Performance & Value class against a class average of 63.4. Its strongest scoring dimension is capacity & usability (84), above the class average of 83. Guarantee & Backbone scores 43, the lowest pillar for this product. The class average on guarantee & backbone is 55. Key specifications: LFP, 96% round-trip efficiency, 10.0 kW continuous output.