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
- 15.36 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, 15.36 kWh in the scored configuration.15.36 kWh usableScored configuration: Battery-Box Premium LVL15.4.
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 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.
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. LVL remains distinct from HVS, HVM and LVS identities already in the catalogue. Scored model: Battery-Box Premium LVL15.4 · checked 2026-08-27. Evidence.
Sources & references · checked 2026-08-30
Strong evidence coverage
15 of 15 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. Exact technical and warranty sources plus CER source version dated 20 August 2026, checked 2026-08-27. First-market US and DE overlay review 2026-08-30: official regional catalogues recorded; Australian overlays and scores unchanged. Battery performance register refresh 2026-08-31: battery/DC round-trip efficiency and cycles-to-70% closed or held from the exact governing sheet.
- Sourced valuesData card →
- Warranty summary10-year product warranty →
Show 3 more
- Modularity & scalabilityManufacturer ↗
- Verified reliabilityManufacturer ↗
- Usable capacity (kWh)Manufacturer ↗
Product record history
1 change to this record · 61 products changed in this update
Source revision
- Current text
- Exact technical and warranty sources plus CER source version dated 20 August 2026, checked 2026-08-27. First-market US and DE overlay review 2026-08-30: official regional catalogues recorded; Australian overlays and scores unchanged. Battery performance register refresh 2026-08-31: battery/DC round-trip efficiency and cycles-to-70% closed or held from the exact governing sheet.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheet
12 changes to this record · 12 products changed in this update
US Support Note
- Before
- Not previously recorded
- After
- BYD's current USA, Mexico and Canada instrument names HVL and HVM-US, not LVL 15.4. The live HVL US datasheet is a different high-voltage identity. The German and English LVL datasheets list IEC 62619, CE, CEC and UN 38.3, not UL. An older Americas LVL warranty is not a current US sale path for this identity.
DE Warranty conditions
- Before
- Not previously recorded
- After
- labour: Ordinary onsite labour is not expressly promised. Optional service work is billed to the first purchaser.; registration: Installation within one month of invoice, approved operation, timely notice, invoice and serial evidence apply.; remedy: BYD chooses free repair, replacement or a calculated partial refund.; removal reinstallation: Removal and reinstallation are not expressly promised.; transferability: The German terms define the beneficiary as the first purchaser and do not establish transfer.; transport: Ordinary freight is not expressly promised.
US Evidence sources
- Before
- Not previously recorded
- After
- https://bydbatterybox.com/uploads/downloads/240108_BYD_Battery-Box_Premium_HVL_US_Datasheet_V1.9-659b567c44f0c.pdf; https://www.bydbatterybox.com/downloads; https://www.bydbatterybox.com/uploads/downloads/BBOX_LVL_Datasheet_DE_V1.0_240703_L-668f866792418.pdf; https://www.bydbatterybox.com/uploads/downloads/BYD%20Battery-Box%20Premium%20HVL%26HVM-US%20Limited%20Warranty-USA,%20Mexico%20and%20Canada%20V1.3-672329fe15037.pdf
DE Evidence sources
- Before
- Not previously recorded
- After
- https://www.bydbatterybox.com/downloads; https://www.bydbatterybox.com/uploads/downloads/BBOX_LVL_Datasheet_DE_V1.0_240703_L-668f866792418.pdf; https://www.bydbatterybox.com/uploads/downloads/BYD%20Battery-Box%20Premium%20LVL%20Limited%20Warranty-Residential-Germany-DE%20V1.1-5f18f46247e4a.pdf
DE Status
- Before
- Not previously recorded
- After
- available
DE Support Note
- Before
- Not previously recorded
- After
- BYD's live downloads library still publishes a German LVL datasheet and a German residential warranty naming LVL 15.4. HVM, HVS, HVL and LVS are different identities. Distributor stock is not inferred.
US Status
- Before
- Not previously recorded
- After
- unavailable
US Certifications
- Before
- Not previously recorded
- After
DE Grid and installation context
- Before
- Not previously recorded
- After
- The LVL battery's IEC 62619 evidence is battery-safety evidence, not standalone German grid approval. Grid conformity belongs to the site inverter and installation. No product pairing is asserted.
DE Warranty scope
- Before
- Not previously recorded
- After
- Germany; the German residential LVL instrument names LVL 15.4 for ten years and 80 percent retained usable energy or 40.34 MWh, whichever occurs first, for products installed on or after 1 January 2020.
Source revision
- Before
- Exact technical and warranty sources plus CER source version dated 20 August 2026, checked 2026-08-27
- After
- Exact technical and warranty sources plus CER source version dated 20 August 2026, checked 2026-08-27. First-market US and DE overlay review 2026-08-30: official regional catalogues recorded; Australian overlays and scores unchanged.
DE Certifications
- Before
- Not previously recorded
- After
- The German LVL datasheet names LVL15.4 (2021) and lists IEC 62619, CE, CEC and UN 38.3.
1 change to this record · 1 product changed in this update
Product record
kind: battery; brand: BYD; name: Battery-Box Premium LVL 15.4; model: Battery-Box Premium LVL15.4 (2021); exact Australian low-voltage battery; score: 61.1
Primary datasheet
This is review.solar's publication history. It does not claim the product changed on the recorded date, and it excludes compatibility, system pairing, installation suitability and relative leaderboard prose. Open the complete JSON record.
Evidence timeline
Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots.
- Core scorecard evidence checked
- US market evidence checked
- DE market evidence checked
- AU market evidence checked
- Series benchmark evidence checked
- Plain-language warranty summary 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
Battery-Box Premium LVL 15.4 scores 61, placing 48 of 74 in the Performance & Value class against a class average of 63.0. Its strongest scoring dimension is capacity & usability (88), above the class average of 83. Energy Ecosystem scores 40, the lowest pillar for this product. The class average on energy ecosystem is 47. Key specifications: LFP, 95% round-trip efficiency, 12.8 kW continuous output.