Fox ESS EQ4800
Warranty terms: 10 years (Australia); 12 years (UK, if registered (Fox ESS website within 36 months of manufacture, Fox Cloud via Fox datalogger)); warranted throughput: 16.7 MWh (UK).
Brand: Fox ESS
Published figures
No figures have been collected for usable energy, continuous power, motor-start current, units per system, and end-of-warranty capacity.
| Figure | Value | Publisher | Source |
|---|---|---|---|
| Round-trip efficiency | 95% | Manufacturer Not yet checked | Spec sheet, at p2 / Electrical Characteristics, retrieved Sep 23, 2026, dated Jul 10, 2026 |
| Lowest operating temperature (discharging) | −10°C | Manufacturer Not yet checked | Spec sheet, at p2 / Operating Conditions, retrieved Sep 23, 2026, dated Jul 10, 2026 |
| Lowest operating temperature (charging) | 0°C | Manufacturer Not yet checked | Spec sheet, at p2 / Operating Conditions, retrieved Sep 23, 2026, dated Jul 10, 2026 |
| Highest operating temperature (discharging) | 55°C | Manufacturer Not yet checked | Spec sheet, at p2 / Operating Conditions, retrieved Sep 23, 2026, dated Jul 10, 2026 |
| Highest operating temperature (charging) | 55°C | Manufacturer Not yet checked | Spec sheet, at p2 / Operating Conditions, retrieved Sep 23, 2026, dated Jul 10, 2026 |
Stated temperature limits
Stated charging range: 32°F (0°C) to 131°F (55°C).
Spec sheet, at p2 / Operating Conditions, retrieved Sep 23, 2026, dated Jul 10, 2026 Not yet checked
Stated discharging range: 14°F (−10°C) to 131°F (55°C).
Spec sheet, at p2 / Operating Conditions, retrieved Sep 23, 2026, dated Jul 10, 2026 Not yet checked
Warranty terms
| Term | Figure | Document |
|---|---|---|
| Warranty, Australia | 10 years | Warranty, at p1 / Standard Performance Warranty, retrieved Sep 23, 2026, dated Jun 12, 2026 |
| Warranty, UK | 12 years (if registered (Fox ESS website within 36 months of manufacture, Fox Cloud via Fox datalogger)) | Warranty, at p2 / performance warranty, retrieved Sep 23, 2026, dated Mar 13, 2025ECS2900, ECS4100, ECS4300H, ECS4800, EQ4800, EQ2900, EQ4300, EQ5000: Fox ESS warrants and represents that the Product retains at least 70% of Nominal Energy for the either 12 years after the date of the initial installation |
| Warranted throughput, UK | 16.7 MWh | Warranty, at p2 / throughput table, retrieved Sep 23, 2026, dated Mar 13, 2025ECS4800 (12 years) 4.66kWh 16.7MWh |
Warranty, at p1 / Standard Performance Warranty, retrieved Sep 23, 2026, dated Jun 12, 2026 Not yet checked
Warranty, at p2 / performance warranty, p2 / throughput table, retrieved Sep 23, 2026, dated Mar 13, 2025
ECS2900, ECS4100, ECS4300H, ECS4800, EQ4800, EQ2900, EQ4300, EQ5000: Fox ESS warrants and represents that the Product retains at least 70% of Nominal Energy for the either 12 years after the date of the initial installation, ECS4800 (12 years) 4.66kWh 16.7MWh
Features the manufacturer states
| Feature | Stated | Source |
|---|---|---|
| Chemistry | LFP Not yet checked | Spec sheet, at p2 / Electrical Characteristics, retrieved Sep 23, 2026, dated Jul 10, 2026 |
Government and program lists
This product is on none of the lists this site reads.
Installs
No install count this site publishes covers this product.
Recalls and safety notices
No notice in the recall sources this site reads is matched to this product. That is not a safety finding. See every recall notice.
Backup hours from your load
This battery has no maker-stated usable energy on this site.