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
- 3.46–10.37 kWh
- Phase
- Not recorded
- Backup boundary
- Installation-specific
Usable capacity
Stated depth of discharge: 90%. Published usable energy: 10.37 kWh in the scored configuration. These values may have different measurement conditions.10.37 kWh usableScored configuration: Power Battery 11.5. Published range 3.46–10.37 kWh.
The stated depth of discharge and published usable energy can have different test conditions or configuration limits. They do not by themselves establish nominal capacity or a reserve that is always inaccessible. Delivered AC energy and runtime also depend on the inverter, settings and loads.
The score uses the named exact German benchmark; larger stacks, paid states and nearby generations do not transfer evidence.
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. The score uses the named exact German benchmark; larger stacks, paid states and nearby generations do not transfer evidence. Scored model: Power Battery 11.5 · checked 2026-08-16. Evidence.
Sources & references · checked 2026-09-01
Strong evidence coverage
12 of 12 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.
How far the evidence reaches
- OutputManufacturer claim3 rows
- EnduranceManufacturer claim4 rows
- SafetyManufacturer claim4 rows
- Warranty & backingManufacturer claim1 row
- FitNot assessed for batteries
- FootprintNot assessed for batteries
Rings, outside in: manufacturer claim, certified or regulator-listed, third-party source. The centre is review.solar's own measurement, empty for every product today. How the evidence puzzle works
Record revision. Current German product, datasheet and governing battery warranty checked 2026-08-16. First-market US overlay review 2026-09-01: official United States catalogues recorded; existing Australian and German overlays and scores unchanged.
- Sourced valuesData card →
- Warranty throughputManufacturer ↗
Show 1 more
- Cell chemistryManufacturer ↗
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.
- Cell provenance & traceabilityNot stated in reviewed documentsThe public documents reviewed for this record do not state this value. A published or independent source is requested.Offer a source
Product record history
1 change to this record · 22 products changed in this update
DE Warranty conditions
- Current text
- labour: Onsite installation labour is excluded.; registration: Claims must be made to RCT Power GmbH within 14 days after the defect is detected or should have been detected, for example by letter or e-mail.; remedy: RCT applies the governing depreciating time-value remedy after year two.; removal reinstallation: Removal and installation costs are excluded.; transferability: Remaining warranty transfers to a subsequent owner.; transport: Transport costs are excluded.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Cell chemistryPrimary datasheet+1 in JSON record
5 changes to this record · 10 products changed in this update
5 changes to this record · 152 products changed in this update
US Support Note
- Before
- Not previously recorded
- After
- rct-power.com/us opens the German homepage, not a United States catalogue, and does not name Power Battery 11.5 as a US product.
Source revision
- Before
- Current German product, datasheet and governing battery warranty checked 2026-08-16
- After
- Current German product, datasheet and governing battery warranty checked 2026-08-16. First-market US overlay review 2026-09-01: official United States catalogues recorded; existing Australian and German overlays and scores unchanged.
US Evidence sources
- Before
- Not previously recorded
- After
- https://www.rct-power.com/de/batteriespeicher-rct-power-battery.html; https://www.rct-power.com/us/
1 change to this record · 9 products changed in this update
DE Grid and installation context
- Before
- Not previously recorded
- After
- The Power Battery's IEC 62619 and IEC 62133 evidence is battery-safety evidence, not standalone German grid approval. Final grid conformity belongs to the connected power-conversion equipment and site design; no pairing is inferred.
19 changes to this record · 78 products changed in this update
Value
- Before
- Not previously recorded
- After
- The exact product material publishes 5,000 cycles at an 80% retained capacity endpoint, not 70%.
Value
- Before
- Not previously recorded
- After
- Reviewed 2026-08-25: The exact product material publishes 5,000 cycles at an 80% retained capacity endpoint, not 70%. No cycles-to-70% value is substituted into the score.
Evidence sources
- Before
- Not previously recorded
- After
- https://www.rct-power.com/de/download-bereich-de.html
Evidence sources
- Before
- Not previously recorded
- After
- https://www.rct-power.com/de/batteriespeicher-rct-power-battery.html; https://www.rct-power.com/de/download-bereich-de.html
Evidence sources
- Before
- Not previously recorded
- After
- https://www.rct-power.com/de/batteriespeicher-rct-power-battery.html; https://www.rct-power.com/de/download-bereich-de.html
Cycle life (cycles to 70%): Evidence sources
- Before
- https://www.rct-power.com/de/batteriespeicher-rct-power-battery.html; https://www.rct-power.com/de/download-bereich-de.html
- After
- No longer recorded
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.
Cycle life (cycles to 70%): Evidence status
- Before
- sourced
- After
- No longer recorded
1 change to this record · 13 products changed in this update
Product record
kind: battery; brand: RCT Power; name: Power Battery; model: Power Battery 3.8 / 5.7 / 7.6 / 9.6 / 11.5; scored 11.5 at 10.37 kWh usable; score: 55.7
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
- 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
Power Battery scores 56, placing 70 of 76 in the Performance & Value class against a class average of 63.6. Its strongest scoring dimension is capacity & usability (79). Energy Ecosystem scores 40, the lowest pillar for this product. The class average on energy ecosystem is 48. Key specifications: LFP.
Dietreich Farquharson · review.solar