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
- 18 kWh
- Phase
- Not recorded
- 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.
Blackout protection
67 / 100#33 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. The score is fixed to the reviewed six-module 18 kWh system, not the larger two-cabinet marketing ceiling. Scored model: PWRcell 2 six-module configuration · checked 2026-08-02. Evidence.
Sources & references · checked 2026-08-07
Strong evidence coverage
22 of 22 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. Current PWRcell 2 product page and specification, warranty revision B dated June 2025, Smart Disconnect Switch manual and buyer-consequence boundaries reviewed 2026-08-07
- Sourced valuesData card →
- Archived copy of the primary sourcePDF ↗
Show 3 more
- Financial strength & warranty backingManufacturer ↗
- 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
- 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
PWRcell 2 18 scores 61, placing 43 of 63 in the Performance & Value class against a class average of 63.4. Its strongest scoring dimension is guarantee & backbone (84), running 29.1 points above the class average on this dimension. Energy Ecosystem scores 43, the lowest pillar for this product. The class average on energy ecosystem is 48. Key specifications: NMC, 88% round-trip efficiency, 10.5 kW continuous output.