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
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.
Blackout protection
79 / 100#8 of 90 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 existing three-module SPHI-19.8-L0 stack. Its 19.95 kWh benchmark is nominal energy; a 100% DoD cycle test does not establish a separately measured usable-energy value. Scored model: SPHI-19.8-L0 three-module stack · checked 2026-10-05. Evidence.
Sources & references · checked 2026-09-01
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 a guarantee that a claim is correct.
How far the evidence reaches
2 of 5 questions with checkable rows have a row beyond the maker's claim.
- Output4 checkable rows, none beyond the maker's claimMaker-only: 4 design facts
- Endurance1 of 2 checkable rows beyond the maker's claimMaker-only: 4 maker's commitments1 held row, not scored
- Safety1 of 4 checkable rows 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: 2 design facts
- 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. Held rows have no value, and each says why: not yet confirmed for the exact product, published but not matched to a rubric band, set by paired equipment, or not applicable. They are not scored and are counted under each question, never drawn. review.solar has measured none of these rows itself. How the evidence puzzle works
Record correction. 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. First-market DE overlay review 2026-09-01: official German catalogues recorded; existing United States overlay and scores unchanged. Exact US EnergyTrak update-servicing and app/gateway release boundaries integrated 2026-10-05 from accepted current maker support, monitoring and release documentation; battery security-policy hold retained. Nominal benchmark metadata and visible current cycle-test endpoint reconciled 2026-10-05 against BS1547 - 4-22-26 PDF pages 1 and 3; hidden older text layers excluded. Existing configuration, scores and governing warranty endpoint retained. Corrected 2026-10-21: this note previously said existing Australian overlays were unchanged; the record carried none.
- Sourced valuesData card →
- Firmware & security disclosureManufacturer ↗
Show 9 more
- Firmware & security disclosureManufacturer ↗
- Usable capacity (kWh)Manufacturer ↗
- Safety certificationManufacturer ↗
- Verified reliabilityManufacturer ↗
- Battery generation compatibilityManufacturer ↗
- Verified reliabilityManufacturer ↗
- Financial strength & warranty backingManufacturer ↗
- Open protocol & API maturityManufacturer ↗
- VPP & grid services readinessManufacturer ↗
Help strengthen this record
These are published evidence gaps, not private submissions. A source is reviewed under the same methodology whether it comes from a reader, installer or manufacturer.
- Cell balancing architectureNot stated in reviewed documentsThe public documents reviewed for this record do not state this value. A published or third-party source is requested.Offer a source
- AC terminal & connection protectionNot stated in reviewed documentsThe public documents reviewed for this record do not state this value. A published or third-party source is requested.Offer a source
- Open protocol & API maturityNot stated in reviewed documentsThe public documents reviewed for this record do not state this value. A published or third-party source is requested.Offer a source
- EV charging integrationNot stated in reviewed documentsThe public documents reviewed for this record do not state this value. A published or third-party source is requested.Offer a source
Product record history
1 change to this record · 280 products changed in this update
Cycle life (cycles to 70%)
- Before
- Not previously recorded
- After
- Published, but not matched to a rubric band
1 change to this record · 30 products changed in this update
Source revision
- After this change
- 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. First-market DE overlay review 2026-09-01: official German catalogues recorded; existing United States overlay and scores unchanged. Exact US EnergyTrak update-servicing and app/gateway release boundaries integrated 2026-10-05 from accepted current maker support, monitoring and release documentation; battery security-policy hold retained. Nominal benchmark metadata and visible current cycle-test endpoint reconciled 2026-10-05 against BS1547 - 4-22-26 PDF pages 1 and 3; hidden older text layers excluded. Existing configuration, scores and governing warranty endpoint retained. Corrected 2026-10-21: this note previously said existing Australian overlays were unchanged; the record carried none.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheet
1 change to this record · 30 products changed in this update
Source revision
- After this change
- 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. First-market DE overlay review 2026-09-01: official German catalogues recorded; existing United States overlay and scores unchanged. Exact US EnergyTrak update-servicing and app/gateway release boundaries integrated 2026-10-05 from accepted current maker support, monitoring and release documentation; battery security-policy hold retained. Nominal benchmark metadata and visible current cycle-test endpoint reconciled 2026-10-05 against BS1547 - 4-22-26 PDF pages 1 and 3; hidden older text layers excluded. Existing configuration, scores and governing warranty endpoint retained.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheet
4 changes to this record · 153 products changed in this update
Firmware & security disclosure: Evidence status
- Before
- Reviewed absence
- After
- Sourced
3 changes to this record · 13 products changed in this update
DE Support Note
- After this change
- On 19 October 2026 Briggs & Stratton's German site (briggsandstratton.com/de-de) was reachable and its product navigation listed engines, portable generators, care products, accessories and petrol mowers, with no battery or energy storage product and no SimpliPHI listing. The Energy Solutions site redirected to en-us only, and its sitemap listed 413 en-us pages and no German pages; the legacy simpliphipower.com timed out. Because the maker's German catalogue omits SPHI-19.8-L0 and the SimpliPHI line, the German overlay is unavailable.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
DE market evidenceDE market evidence+2 in JSON recordDE Evidence sources
- Before
- https://simpliphipower.com/
- After
- https://energy.briggsandstratton.com/; https://energy.briggsandstratton.com/sitemap.xml; https://simpliphipower.com/; https://www.briggsandstratton.com/de-de/
1 change to this record · 1 product changed in this update
Safety certification: Evidence sources
- Before
- https://briggs.widen.net/s/zmhd8gb67h/bas_es_bs1456_6-6_battery_spec
- After
- https://briggs.widen.net/s/zmhd8gb67h/bas_es_bs1456_6-6_battery_spec; https://solarequipment.energy.ca.gov/Home/DownloadtoExcel?filename=BatteryList
1 change to this record · 8 products changed in this update
DE Support Note
- Before
- simpliphipower.com timed out from this review environment. No German catalogue naming SPHI-19.8-L0 was retrieved. Held is not unavailable.
- After
- simpliphipower.com timed out from this review environment on 1 September and again on 7 October 2026 (host resolves, connection times out). energy.briggsandstratton.com publishes en-us pages only, the briggsandstratton.com de-de site lists no SimpliPHI or energy storage pages, and the current Limited Warranty for ESS Products names no German coverage. No German catalogue naming SPHI-19.8-L0 was retrieved. Held is not unavailable.
3 changes to this record · 1 product changed in this update
Note
- Before
- 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.
- After
- The score is fixed to the existing three-module SPHI-19.8-L0 stack. Its 19.95 kWh benchmark is nominal energy; a 100% DoD cycle test does not establish a separately measured usable-energy value.
Source revision
- After this change
- 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. First-market DE overlay review 2026-09-01: official German catalogues recorded; existing Australian and United States overlays and scores unchanged. Exact US EnergyTrak update-servicing and app/gateway release boundaries integrated 2026-10-05 from accepted current maker support, monitoring and release documentation; battery security-policy hold retained. Nominal benchmark metadata and visible current cycle-test endpoint reconciled 2026-10-05 against BS1547 - 4-22-26 PDF pages 1 and 3; hidden older text layers excluded. Existing configuration, scores and governing warranty endpoint retained.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheet
3 changes to this record · 1 product changed in this update
US Support Note
- After this change
- The exact three-module stack publishes 19.95 kWh nominal, 13.98 kW continuous and 17.5 kW for ten seconds. Usable energy is not separately published. The battery remains current in the United States catalogue. EnergyTrak update servicing uses a separate gateway; the current ET-GWY-20 monitoring page names SimpliPHI 6.6 compatibility and over-the-air updates. Published EnergyTrak app and gateway release history does not establish the battery BMS version, signed battery firmware, a vulnerability disclosure policy or a security support lifetime. Offline programmer features documented for SAVR/Briggs Controller are not established for this battery.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
US market evidenceWarranty throughput+6 in JSON recordUS Evidence sources
- Before
- https://briggs.widen.net/s/zmhd8gb67h/bas_es_bs1456_6-6_battery_spec; https://energy.briggsandstratton.com/content/dam/energysolutions/files/resources-documents/Briggs%20Stratton%20Limited%20Warranty%20for%20ESS%20Products.pdf; https://energy.briggsandstratton.com/en-us/residential/products/energy-storage/battery-backup-packages; https://energy.briggsandstratton.com/en-us/support/simpliphi-66-product-support; https://solarequipment.energy.ca.gov/Home/PropertyDetails/BatteryList; https://www.bascodigital.com/assets/share/asset/vfldacrjm0
- After
- https://briggs.widen.net/s/zmhd8gb67h/bas_es_bs1456_6-6_battery_spec; https://docs.energytrak.io/releases/; https://energy.briggsandstratton.com/content/dam/energysolutions/files/resources-documents/Briggs%20Stratton%20Limited%20Warranty%20for%20ESS%20Products.pdf; https://energy.briggsandstratton.com/en-us/residential/products/energy-storage/battery-backup-packages; https://energy.briggsandstratton.com/en-us/residential/products/energy-storage/energytrak-battery-monitoring; https://energy.briggsandstratton.com/en-us/support/simpliphi-66-product-support; https://solarequipment.energy.ca.gov/Home/PropertyDetails/BatteryList; https://www.bascodigital.com/assets/share/asset/vfldacrjm0
Source revision
- After this change
- 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. First-market DE overlay review 2026-09-01: official German catalogues recorded; existing Australian and United States overlays and scores unchanged. Exact US EnergyTrak update-servicing and app/gateway release boundaries integrated 2026-10-05 from accepted current maker support, monitoring and release documentation; battery security-policy hold retained.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheet
5 changes to this record · 152 products changed in this update
DE Support Note
- Before
- Not previously recorded
- After
- simpliphipower.com timed out from this review environment. No German catalogue naming SPHI-19.8-L0 was retrieved. Held is not unavailable.
Source revision
- After this change
- 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. First-market DE overlay review 2026-09-01: official German catalogues recorded; existing Australian and United States overlays and scores unchanged.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheet
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.
- DE market evidence checked
- US market evidence checked
- Series benchmark evidence checked
- Core scorecard 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 76 in the Performance & Value class against a class average of 64.4. Its highest-scoring dimension is capacity & usability (90), running 6.6 points above the class average on this dimension. Energy Ecosystem (52) is the dimension with the most room to move. Key specifications: LFP, 96% round-trip efficiency, 13.98 kW continuous output.
Dietreich Farquharson · review.solar