The assessment
How it scores, 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
90% of this battery’s nominal capacity is usable, 18 kWh in the scored configuration.18 kWh usableScored configuration: EVHB-I7-X20.
The remaining 10% 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 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
64 / 100#48 of 78 batteriesWhole-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.
Australian warranty decision
0 product records
Read the Australian warranty as a claim pathway: the headline term is separate from remedy, labour, freight, site work, transfer and registration conditions.
No available Australian warranty decision record is published for this product. No coverage is inferred.
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 an independent guarantee that a claim is correct.
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 ↗
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- Safety certificationManufacturer ↗
- Financial strength & warranty backingManufacturer ↗
- Manufacturing track recordManufacturer ↗
- VPP & grid services readinessManufacturer ↗
- Verified reliabilityManufacturer ↗
Evidence timeline
Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots. No change to this product record has been published since the change ledger opened on 2026-08-16.
- 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.
Our reading
Its strongest scoring dimension is guarantee & backbone (92), running 37.1 points above the class average on this dimension. Energy Ecosystem scores 42, the lowest pillar for this product. The class average on energy ecosystem is 48. Key specifications: LFP, 94% round-trip efficiency, 7.6 kW continuous output.