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
- 20.6 kWh
- Phase
- Three phase
- Backup boundary
- Installation-specific
Capacity 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 seven-module configuration. Battery output, inverter AC output and replacement-power behavior are published separately. Scored model: S10 X 21 with seven battery modules · checked 2026-08-06. Evidence.
Sources & references · checked 2026-08-06
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.
Record revision. E3/DC X-Series technical sheet and HagerEnergy 120-month German warranty reviewed 2026-08-06
- Sourced valuesData card →
- Archived copy of the primary sourcePDF ↗
Show 1 more
- Backup switching speedManufacturer ↗
Product record history
12 changes to this record · 78 products changed in this update
Evidence sources
- Before
- Not previously recorded
- After
- https://www.e3dc.com/wp-data/uploads/2026/01/E3DC_TDB_X-Serie.pdf
Value
- Before
- Not previously recorded
- After
- Reviewed 2026-08-25: no exact-product cycle-life result to exactly 70% retained capacity was established in the reviewed primary source set. Warranty limits and other or unstated endpoints are not converted. This is a scoped reviewed absence.
Value
- Before
- Not previously recorded
- After
- The exact source publishes maximum system efficiency including the battery above 90%, but does not define that figure as round-trip efficiency. It is held from the battery/DC score.
Value
- Before
- Not previously recorded
- After
- Reviewed 2026-08-25: The exact source publishes maximum system efficiency including the battery above 90%, but does not define that figure as round-trip efficiency. It is held from the battery/DC score. No battery/DC round-trip value is substituted into the score.
Evidence sources
- Before
- Not previously recorded
- After
- https://www.e3dc.com/wp-data/uploads/2026/01/E3DC_TDB_X-Serie.pdf
Evidence sources
- Before
- Not previously recorded
- After
- https://www.e3dc.com/wp-data/uploads/2026/01/E3DC_TDB_X-Serie.pdf
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
- 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
S10 X 21 scores 51, placing 63 of 65 in the Performance & Value class against a class average of 63.1. Its strongest scoring dimension is safety & chemistry (61). Energy Ecosystem scores 40, the lowest pillar for this product. The class average on energy ecosystem is 48. Key specifications: LFP, 11 kW continuous output.