Manufacturer SKU not documented
Not documented yet: Size.
Manufacturer SKU not documented
Not documented yet: Size.
Manufacturer SKU not documented
Not documented yet: Size.
Manufacturer SKU not documented
Not documented yet: Size.
Manufacturer SKU not documented
Not documented yet: Size.
Manufacturer SKU not documented
Not documented yet: Size.
Manufacturer SKU not documented
Not documented yet: Size.
Not documented yet: Size.
Not documented yet: Size.
Not documented yet: Size.
Not documented yet: Size.
Not documented yet: Size.
Not documented yet: Size.
Not documented yet: Size.
Not documented yet: Size.
Not documented yet: Size.
Not documented yet: Size.
Not documented yet: Size.
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 "eFlex Max 5.4": UL 1973, certifying entity Intertek, certificate date 2024-06-27, Ed. 3 : 2022, CEC listing date 2024-10-01. A state equipment list entry, not the certification body's own record.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model eFlex MAX 5.4 listed on the California Energy Commission Battery List (data unchanged since October 1, 2026; downloaded October 11, 2026) under Fortress Power LLC, as "eFlex Max 5.4", CEC listing date 2024-10-01. The list prints "eFlex Max 5.4"; the record's model "eFlex MAX 5.4" differs only in letter case. This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / 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 "eForce 9.6": UL 1973, certifying entity Intertek, certificate date 2024-10-09, Ed. 3 : 2022, CEC listing date 2024-12-02. A state equipment list entry, not the certification body's own record.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model eBoost DC Energy Storage System 16 P1 listed on the California Energy Commission Energy Storage System List (data unchanged since October 1, 2026; downloaded October 11, 2026) under Fortress Power LLC, as "eBoost DC Energy Storage System 16 P1" (row 1877), CEC listing date 2025-12-22. Fortress Power's eBoost data sheet prints "eBoost DC Energy Storage System 16 P1" as the Model Number of the eBoost 16. This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC Energy Storage System List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentOfficial datasheet: Fortress Power eBoost Scalable Energy Storage System data sheet (V.EBOOST_051326) Rev V.EBOOST_051326 · CheckedProduct / 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 "eFlex 5.4": UL 1973, certifying entity Intertek, certificate date 2020-08-11, Ed. 2 : 2018, CEC listing date 2020-09-11. A state equipment list entry, not the certification body's own record.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Listed on the California Energy Commission Energy Storage System List (data unchanged since October 1, 2026; downloaded October 11, 2026) as Fortress Power LLC "eFlex 5.4": UL 9540, certifying entity Intertek, certificate date 2021-04-26, Ed. 1 : 2016, CEC listing date 2021-06-21. A state equipment list entry, not the certification body's own record.
Issuer record: CEC Energy Storage System List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model eFlex 5.4 listed on the California Energy Commission Battery List (data unchanged since October 1, 2026; downloaded October 11, 2026) under Fortress Power LLC (brand Fortress Power), as "eFlex 5.4", CEC listing date 2020-09-11. This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model eFlex 5.4 listed on the California Energy Commission Energy Storage System List (data unchanged since October 1, 2026; downloaded October 11, 2026) under Fortress Power LLC, as "eFlex 5.4", CEC listing date 2021-06-21. This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC Energy Storage System List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / 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-S8-I": UL 1973, certifying entity SGS, certificate date 2026-04-07, Ed. 3 : 2022, CEC listing date 2026-05-21. A state equipment list entry, not the certification body's own record.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model FP-Nano-S8-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-S8-I"; "FP-Nano-S8-O", CEC listing date 2026-05-21. Matched on the record's model alias "FP-Nano-S8-I". This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model FP-Nano-S8-O listed on the California Energy Commission Energy Storage System List (data unchanged since October 1, 2026; downloaded October 11, 2026) under Fortress Power LLC (brand Fortress Power), as "FP-Nano-S8-O", CEC listing date 2026-05-11. Matched on the record's model alias "FP-Nano-S8-O". This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC Energy Storage System List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / 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-S12-I": UL 1973, certifying entity SGS, certificate date 2026-04-07, Ed. 3 : 2022, CEC listing date 2026-05-21. A state equipment list entry, not the certification body's own record.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model FP-Nano-S12-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-S12-I"; "FP-Nano-S12-O", CEC listing date 2026-05-21. Matched on the record's model alias "FP-Nano-S12-I". This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model FP-Nano-S12-O listed on the California Energy Commission Energy Storage System List (data unchanged since October 1, 2026; downloaded October 11, 2026) under Fortress Power LLC (brand Fortress Power), as "FP-Nano-S12-O", CEC listing date 2026-05-11. Matched on the record's model alias "FP-Nano-S12-O". This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC Energy Storage System List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model FP-Nano-S4-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-S4-I", CEC listing date 2026-05-21. This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / 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-S4-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.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model FP-Nano-S4-O 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-S4-O", CEC listing date 2026-05-21. This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / 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-S4-O": 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.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model FP-Nano-S5-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-S5-I", CEC listing date 2026-05-21. This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / 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-S5-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.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model FP-Nano-S5-O 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-S5-O", CEC listing date 2026-05-21. This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / 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-S5-O": 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.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / 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.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / 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.
Issuer record: CEC Battery List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentNo manufacturer history recorded yet.
This manufacturer is listed as Fortress Power. Manufacturing entities, factories, cell origin and model-specific ownership relationships have not been audited.
Product certificates and company management certificates are tracked separately. No company management certificates have been reviewed for this manufacturer yet.
No recalls or legal notices on file; this is not a complete recall or court search. All notices · Report a notice
No owner reviews yet. Review policy
Representatives of Fortress Power can use a manufacturer account to:
Staff review every change. Manufacturer accounts cannot edit or remove reviews or change scores.
1 Product price · price basis. * Calculated; estimates labeled. Value needs confirmation; select it for the reason.
