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
- 19.95 kWh
- Phase
- Not recorded
- Backup boundary
- Installation-specific
Usable capacity
100% of this battery’s nominal capacity is usable, 19.95 kWh in the scored configuration.19.95 kWh usableScored configuration: SPHI-19.8-L0 three-module stack.
No reserve is withheld at the stated depth of discharge.
At a sourced 100% depth of discharge the usable and nominal figures are the same number, so no separate nominal capacity is stated.
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.
Blackout protection
79 / 100#7 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 flagship three-module 19.95 kWh stack that Briggs & Stratton markets and the California lists carry as SPHI-19.8-L0. Scored model: SPHI-19.8-L0 three-module stack · checked 2026-08-04. Evidence.
Sources & references · checked 2026-08-07
Strong evidence coverage
30 of 30 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 specification BS1547 dated 2026-04-22, retrievable governing ESS warranty effective May 2024, current product and support pages, conflicting later warranty locator and buyer-consequence boundaries reviewed 2026-08-07
- Sourced valuesData card →
- Firmware & security disclosureManufacturer ↗
Show 8 more
- Firmware & security disclosureManufacturer ↗
- Usable capacity (kWh)Manufacturer ↗
- Verified reliabilityManufacturer ↗
- Battery generation compatibilityManufacturer ↗
- Verified reliabilityManufacturer ↗
- Financial strength & warranty backingManufacturer ↗
- Open protocol & API maturityManufacturer ↗
- VPP & grid services readinessManufacturer ↗
Product record history
12 changes to this record · 78 products changed in this update
Value
- Before
- Not previously recorded
- After
- The exact specification publishes DoD-dependent cycle results to a 75% end-of-life endpoint, not 70%.
Value
- Before
- Not previously recorded
- After
- Minimum round-trip efficiency at C/2 of 96% or better on the spec sheet; no round-trip efficiency was declared to the California Energy Commission.
Evidence sources
- Before
- Not previously recorded
- After
- https://briggs.widen.net/s/zmhd8gb67h/bas_es_bs1456_6-6_battery_spec
Value
- Before
- Not previously recorded
- After
- Reviewed 2026-08-25: The exact specification publishes DoD-dependent cycle results to a 75% end-of-life endpoint, not 70%. No cycles-to-70% value is substituted into the score.
Evidence sources
- Before
- Not previously recorded
- After
- https://briggs.widen.net/s/zmhd8gb67h/bas_es_bs1456_6-6_battery_spec
Evidence sources
- Before
- Not previously recorded
- After
- https://briggs.widen.net/s/zmhd8gb67h/bas_es_bs1456_6-6_battery_spec
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
- 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
SimpliPHI 6.6 scores 72, placing 6 of 63 in the Performance & Value class against a class average of 63.0. Its strongest scoring dimension is capacity & usability (90), running 7.3 points above the class average on this dimension. Energy Ecosystem (49) is the dimension with the most room to move. Key specifications: LFP, 96% round-trip efficiency, 13.98 kW continuous output.