The assessment
Historical assessment, by category
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
- 18 kWh
- Phase
- Not recorded
- Backup boundary
- Installation-specific
Usable capacity
Stated depth of discharge: 90%. Published usable energy: 18 kWh in the scored configuration. These values may have different measurement conditions.18 kWh usableScored configuration: EVHB-I7-X20.
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.
Supported installed-base record only. Panasonic states that it no longer sells batteries in the United States.
Usable capacity sourceDepth-of-discharge sourceCapacity guarantee: minimum retained at year 12
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
Whole-home (via hybrid inverter)
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. Supported installed-base record only. Panasonic states that it no longer sells batteries in the United States. Scored model: EVHB-I7-X20 · checked 2026-08-02. Evidence.
Sources & references · checked 2026-08-07
Strong evidence coverage
28 of 28 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 a guarantee that a claim is correct.
How far the evidence reaches
None of the 5 questions with checkable rows has a row beyond the maker's claim.
- Output5 checkable rows, none beyond the maker's claimMaker-only: 3 design facts
- Endurance2 checkable rows, none beyond the maker's claimMaker-only: 4 maker's commitments
- Safety3 checkable rows, none beyond the maker's claimMaker-only: 1 design fact
- Backing2 checkable rows, none beyond the maker's claimMaker-only: 1 maker's commitment
- Fit6 checkable rows, none beyond the maker's claimMaker-only: 1 design fact
- FootprintNot scored for batteries
- Third-party source
- Certified or regulator-listed
- Manufacturer claim
- Reviewed absence
Each bar is one question's checkable rows for this product at true share, stronger tiers first; hatching marks a reviewed absence: not published, we looked. Maker-only rows (warranty terms and design facts that rest on the maker's own documents) are counted under each question, never dropped. review.solar has measured none of these rows itself. How the evidence puzzle works
Record revision. Exact EVHB-I7-X20 sheet, November 2023 governing warranty, installed-base support, completed SolaX Cloud transition and buyer-consequence boundaries reviewed 2026-08-07
- Sourced valuesData card →
- Archived copy of the primary sourcePDF ↗
Show 5 more
- Safety certificationManufacturer ↗
- Financial strength & warranty backingManufacturer ↗
- Manufacturing track recordManufacturer ↗
- VPP & grid services readinessManufacturer ↗
- Verified reliabilityManufacturer ↗
Product record history
12 changes to this record · 78 products changed in this update
Value
- Before
- Not previously recorded
- After
- The exact datasheet separately publishes 90% AC-coupled round-trip efficiency; the scored 94% value is its DC-coupled pathway.
Evidence sources
- Before
- Not previously recorded
- After
- https://ftp.panasonic.com/solar/brochure/home_battery_sheet.pdf
Evidence sources
- Before
- Not previously recorded
- After
- https://ftp.panasonic.com/solar/brochure/home_battery_sheet.pdf
Value
- Before
- Not previously recorded
- After
- The exact datasheet publishes 6,000 cycles at 90% depth of discharge and 70% remaining capacity.
Evidence sources
- Before
- Not previously recorded
- After
- https://ftp.panasonic.com/solar/brochure/home_battery_sheet.pdf
Value
- Before
- Not previously recorded
- After
- The exact system publishes 94% DC-coupled and 90% AC-coupled round-trip efficiency at 50% rated power and beginning of life. The native hybrid DC pathway is recorded.
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
- Legacy product record archived
- Series benchmark evidence checked
Scored by Solar Analytica Research
Stay across the benchmark.
New scorecards, score changes and market signals, published as they happen.