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
- 4.992–29.952 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
97.5% of this battery’s nominal capacity is usable, 4.992 kWh in the scored configuration.4.992 kWh usableScored configuration: BTS 5K. Published range 4.992–29.952 kWh.
The remaining 2.5% 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
47 / 100#74 of 90 batteriesPartial (essential loads)
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 current datasheet range uses one to six 4.992 kWh usable modules. The score remains anchored to one module; the Australian warranty uses a lower 4.60 kWh contractual usable-energy baseline. Scored model: BTS 5K · checked 2026-07-27. Evidence.
Sources & references · checked 2026-08-30
Strong evidence coverage
29 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.
Record revision. BTS 5K datasheet V2.1 dated 2026-01-06, ESI 3-6K-S1 datasheet and Australian battery warranty Rev 1.1 re-audited 2026-08-06. First-market US and DE overlay review 2026-08-30: official regional catalogues recorded; Australian overlays and scores unchanged.
- Sourced valuesData card →
- Warranty summary10-year product warranty →
Show 2 more
- Modularity & scalabilityManufacturer ↗
- Financial strength & warranty backingManufacturer ↗
Product record history
9 changes to this record · 12 products changed in this update
US Status
- Before
- Not previously recorded
- After
- unavailable
DE Certifications
- Before
- Not previously recorded
- After
US Support Note
- Before
- Not previously recorded
- After
- SOFARSOLAR's contact region list names Germany/Austria/Switzerland, Australia, the UK and other territories. It does not name the United States. No official US host lists BTS 5K. us.sofarsolar.com does not resolve. HYD 5-20KTL-3PH is not this PowerAll identity.
US Certifications
- Before
- Not previously recorded
- After
DE Evidence sources
- Before
- Not previously recorded
- After
- https://de.sofarsolar.com/product/residentialstorage/battery/BTS%205K.html; https://de.sofarsolar.com/product/residentialstorage/storageinverter/ESI%203-6K-S1.html; https://www.sofarsolar.com/product/residentialstorage/battery/BTS%205K.html
US Evidence sources
- Before
- Not previously recorded
- After
- https://www.sofarsolar.com/contact.html; https://www.sofarsolar.com/product/residentialstorage/battery/BTS%205K.html; https://www.sofarsolar.com/product/residentialstorage/storageinverter/ESI%203-6K-S1.html
DE Status
- Before
- Not previously recorded
- After
- unavailable
Source revision
- Before
- BTS 5K datasheet V2.1 dated 2026-01-06, ESI 3-6K-S1 datasheet and Australian battery warranty Rev 1.1 re-audited 2026-08-06
- After
- BTS 5K datasheet V2.1 dated 2026-01-06, ESI 3-6K-S1 datasheet and Australian battery warranty Rev 1.1 re-audited 2026-08-06. First-market US and DE overlay review 2026-08-30: official regional catalogues recorded; Australian overlays and scores unchanged.
DE Support Note
- Before
- Not previously recorded
- After
- The dedicated German BTS 5K product URL returns HTTP 500. German ESI 3-6K-S1 copy names PowerAll stack capacities, which is not an independent BTS 5K battery sale path. A Europe-outside-Germany battery warranty that names BTS 5K is not a German instrument. This overlay does not create a pairing recommendation.
8 changes to this record · 78 products changed in this update
Confidence
- Before
- Not previously recorded
- After
- high
State
- Before
- Not previously recorded
- After
- reviewed_absence
Value
- Before
- Not previously recorded
- After
- The exact current datasheet, product page and governing Australian warranty do not publish a cycle-life test to a stated retained-capacity endpoint.
Value
- Before
- Not previously recorded
- After
- Reviewed 2026-08-25: no exact-product battery/DC round-trip efficiency with a complete measurement boundary was established in the reviewed primary source set. This is a scoped reviewed absence, not proof that the value has never been measured.
Evidence sources
- Before
- Not previously recorded
- After
- https://www.sofarsolar.com/product/residentialstorage/battery/BTS%205K.html; https://www.sofarsolar.com/upload/file/20241030/1730269417969037331.pdf; https://www.sofarsolar.com/upload/file/20260107/1767754640090029347.pdf
Evidence sources
- Before
- Not previously recorded
- After
- https://www.sofarsolar.com/product/residentialstorage/battery/BTS%205K.html
State
- Before
- Not previously recorded
- After
- reviewed_absence
Confidence
- Before
- Not previously recorded
- After
- high
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
- DE market evidence checked
- US market evidence checked
- 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
PowerAll BTS 5K scores 62, placing 43 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 38, the lowest pillar for this product. The class average on energy ecosystem is 47. Key specifications: LFP, 2.5 kW continuous output.