From the California Energy Commission list, not a maker document
This figure is printed on the California Energy Commission Solar Equipment List (data unchanged since October 1, 2026) as submitted for the listing. No maker document in the catalog prints it for this model yet.
Listed as "Lithium Iron Phosphate" under "Technology" on the California Energy Commission list (data unchanged since October 1, 2026; downloaded October 11, 2026).
From the California Energy Commission list, not a maker document
This figure is printed on the California Energy Commission Solar Equipment List (data unchanged since October 1, 2026) as submitted for the listing. No maker document in the catalog prints it for this model yet.
Listed as "30.72" under "Nameplate Energy Capacity (kWh)" on the California Energy Commission list (data unchanged since October 1, 2026; downloaded October 11, 2026).
Location: Row 185, Nameplate Energy Capacity (kWh)
Documented
Continuous output power
30.72 kW
From the California Energy Commission list, not a maker document
This figure is printed on the California Energy Commission Solar Equipment List (data unchanged since October 1, 2026) as submitted for the listing. No maker document in the catalog prints it for this model yet.
Listed as "30.72" under "Maximum Continuous Discharge Rate (kW)" on the California Energy Commission list (data unchanged since October 1, 2026; downloaded October 11, 2026).
Location: Row 185, Maximum Continuous Discharge Rate (kW)
Documented
2 specs not documented yet: usable energy, dimensionsHelp fill in ›
All specs5
Chemistry
Lithium Iron Phosphate
From the California Energy Commission list, not a maker document
This figure is printed on the California Energy Commission Solar Equipment List (data unchanged since October 1, 2026) as submitted for the listing. No maker document in the catalog prints it for this model yet.
Listed as "Lithium Iron Phosphate" under "Technology" on the California Energy Commission list (data unchanged since October 1, 2026; downloaded October 11, 2026).
From the California Energy Commission list, not a maker document
This figure is printed on the California Energy Commission Solar Equipment List (data unchanged since October 1, 2026) as submitted for the listing. No maker document in the catalog prints it for this model yet.
Listed as "30.72" under "Nameplate Energy Capacity (kWh)" on the California Energy Commission list (data unchanged since October 1, 2026; downloaded October 11, 2026).
Location: Row 185, Nameplate Energy Capacity (kWh)
Documented
Usable energy
Not documented
Continuous output power
30.72 kW
From the California Energy Commission list, not a maker document
This figure is printed on the California Energy Commission Solar Equipment List (data unchanged since October 1, 2026) as submitted for the listing. No maker document in the catalog prints it for this model yet.
Listed as "30.72" under "Maximum Continuous Discharge Rate (kW)" on the California Energy Commission list (data unchanged since October 1, 2026; downloaded October 11, 2026).
Location: Row 185, Maximum Continuous Discharge Rate (kW)
Documented
Lifetime production
Not published
Published claims and calculations are not independently tested lifetime output.
Dimensions
Not documented
Published claims and calculations, not independent test results.
Documents
1 on file
WEB
CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026)California Energy CommissionIssuer recordOctober 1, 2026
Source details
Revision
Not stated
Revision date
October 1, 2026
Archived copy captured on 2026-10-11.
Location: Model Number row
Retrieved
Recorded document/effective date: Oct 1, 2026
California Energy Commission Solar Equipment List as downloaded on October 11, 2026 (its data key says updated October 1, 2026). It records that a listed model was submitted with the stated certification, certifying entity and dates; it is a state equipment list, not the certification body's own record, and absence from it says nothing about a product.
The Evidence score uses the priorities you choose. It counts published documents, such as certificates and warranty terms, and it compares a documented figure with the best documented figure of the same kind. It does not count owner reviews, and it is not a verdict on product quality or on how many people have reviewed it. A low score can mean little is documented, or that a documented figure is below the best of its kind. Undisclosed data scores 0.
Missing for this product: Certificates evidence needed; Warranty term needed; Warranty energy disclosure evidence needed; Lifetime / capacity evidence needed; Cell model disclosure evidence needed.
Industrial/Commercial ESS · Voltage unconfirmed · Energy unconfirmed · Rated capacity
The warranty term and the lifetime energy are each scored against the best documented value for a home storage battery: a value earns its share of that best, times the weight. A documented value always earns points; an undisclosed one earns 0.
Research pending, 0 points: Certificates, Warranty term, Warranty energy disclosure, Cell model disclosure.
Computed from public specifications and evidence records. Warranty duration is not service quality; certificate evidence points are not a safety rating. Compatibility and installation limits still apply.
CECProduct / system scope unresolvedClaimedListed when checked
Model FP-Nano-S6-I listed on the California Energy Commission Battery List (data unchanged since October 1, 2026; downloaded October 11, 2026) under Fortress Power LLC, as "FP-Nano-S6-I", CEC listing date 2026-05-21. This is an equipment listing, not UL certification or complete-system approval.
UL 1973Product / system scope unresolvedClaimedListed when checked
Listed on the California Energy Commission Battery List (data unchanged since October 1, 2026; downloaded October 11, 2026) as Fortress Power LLC "FP-Nano-S6-I": UL 1973, certifying entity SGS, certificate date 2026-04-07, Ed. 3 : 2022. A state equipment list entry, not the certification body's own record.
No sourced accessories or replacement parts listed yet.
Model history
Model identity
Model
FP-Nano-S6-I
Manufacturer SKU unknown · US market
Observed
CEC: claimed
Product / system scope unresolved. Model FP-Nano-S6-I listed on the California Energy Commission Battery List (data unchanged since October 1, 2026; downloaded October 11, 2026) under Fortress Power LLC, as "FP-Nano-S6-I", CEC listing date 2026-05-21. This is an equipment listing, not UL certification or complete-system approval.
Product / system scope unresolved. Listed on the California Energy Commission Battery List (data unchanged since October 1, 2026; downloaded October 11, 2026) as Fortress Power LLC "FP-Nano-S6-I": UL 1973, certifying entity SGS, certificate date 2026-04-07, Ed. 3 : 2022. A state equipment list entry, not the certification body's own record.
