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Home battery
Fortress Power Avalon-ESS
The Fortress Power Avalon-ESS is a home battery range from Fortress Power with 78 models. Models store 9.8 kWh – 98 kWh in Lithium Ion cells. Rated AC power 5 kW – 34.2 kW. Listed and verified: UL 9540. Sold in United States.
Specifications
- Capacity
- 9.8 kWh – 98 kWh
- Battery chemistry
- Lithium Ion
- Rated AC power
- 5 kW – 34.2 kW
- Models in this range
- 78
Backup and savings with the Fortress Power Avalon-ESS
From 9.8 kWh to 98 kWh of storage, the Fortress Power Avalon-ESS stores daytime solar for the evening and night, and with a backup-capable installation keeps a home running through a power cut. It delivers 5 kW of AC power (up to 34.2 kW in larger configurations), enough for most of a home's circuits at once.
One full charge covers about 33% of an average US home's daily electricity use of 29.6 kWh.
| Load | Runs for about |
|---|---|
| Essential circuits: fridge, lights, internet, phone charging (about 500 W) | 18 hours |
| An average US home (about 1.23 kW around the clock) | 7.2 hours |
Estimates. Electricity prices: U.S. Energy Information Administration, average household electricity use.
Product details
- Product type
- Home battery
- Brand
- Fortress Power
- Category
- Home Battery Storage
- Sold in
- United States
- Listed in
- California Energy Commission
Models (78)
| Model | Nominal capacity | Usable capacity | AC power | Certificate |
|---|---|---|---|---|
| Avalon-ESS-11.4P1-9.8P1M2 | 9.8 kWh | 11.4 kVA | ||
| Avalon-ESS-5P1-9.8P1M2 | 9.8 kWh | 5 kVA | ||
| Avalon-ESS-7.6P1-9.8P1M2 | 9.8 kWh | 7.6 kVA | ||
| Avalon-ESS-11.4P1-14.7P1M3 | 14.7 kWh | 11.4 kVA | ||
| Avalon-ESS-5P1-14.7P1M3 | 14.7 kWh | 5 kVA | ||
| Avalon-ESS-7.6P1-14.7P1M3 | 14.7 kWh | 7.6 kVA | ||
| Avalon-ESS-11.4P1-19.6P1M4 | 19.6 kWh | 11.4 kVA | ||
| Avalon-ESS-11.4P1-19.6P2M2 | 19.6 kWh | 11.4 kVA | ||
| Avalon-ESS-11.4P2-19.6P1M2 | 19.6 kWh | 22.8 kVA | ||
| Avalon-ESS-5P1-19.6P1M4 | 19.6 kWh | 5 kVA | ||
| Avalon-ESS-5P1-19.6P2M2 | 19.6 kWh | 5 kVA | ||
| Avalon-ESS-5P2-19.6P1M2 | 19.6 kWh | 10 kVA | ||
| Avalon-ESS-7.6P1-19.6P1M4 | 19.6 kWh | 7.6 kVA | ||
| Avalon-ESS-7.6P1-19.6P2M2 | 19.6 kWh | 7.6 kVA | ||
| Avalon-ESS-7.6P2-19.6P1M2 | 19.6 kWh | 15.2 kVA | ||
| Avalon-ESS-11.4P1-24.5P1M5 | 24.5 kWh | 11.4 kVA | ||
| Avalon-ESS-5P1-24.5P1M5 | 24.5 kWh | 5 kVA | ||
| Avalon-ESS-7.6P1-24.5P1M5 | 24.5 kWh | 7.6 kVA | ||
| Avalon-ESS-11.4P1-29.4P1M6 | 29.4 kWh | 11.4 kVA | ||
| Avalon-ESS-11.4P1-29.4P2M3 | 29.4 kWh | 11.4 kVA | ||
| Avalon-ESS-11.4P2-29.4P1M3 | 29.4 kWh | 22.8 kVA | ||
| Avalon-ESS-11.4P3-29.4P1M2 | 29.4 kWh | 34.2 kVA | ||
| Avalon-ESS-5P1-29.4P1M6 | 29.4 kWh | 5 kVA | ||
| Avalon-ESS-5P1-29.4P2M3 | 29.4 kWh | 5 kVA | ||
| Avalon-ESS-5P2-29.4P1M3 | 29.4 kWh | 10 kVA | ||
| Avalon-ESS-5P3-29.4P1M2 | 29.4 kWh | 15 kVA | ||
| Avalon-ESS-7.6P1-29.4P1M6 | 29.4 kWh | 7.6 kVA | ||
| Avalon-ESS-7.6P1-29.4P2M3 | 29.4 kWh | 7.6 kVA | ||
| Avalon-ESS-7.6P2-29.4P1M3 | 29.4 kWh | 15.2 kVA | ||
| Avalon-ESS-7.6P3-29.4P1M2 | 29.4 kWh | 22.8 kVA | ||
| Avalon-ESS-11.4P1-39.2P2M4 | 39.2 kWh | 11.4 kVA | ||
| Avalon-ESS-11.4P2-39.2P1M4 | 39.2 kWh | 22.8 kVA | ||
| Avalon-ESS-11.4P2-39.2P2M2 | 39.2 kWh | 22.8 kVA | ||
| Avalon-ESS-5P1-39.2P2M4 | 39.2 kWh | 5 kVA | ||
| Avalon-ESS-5P2-39.2P1M4 | 39.2 kWh | 10 kVA | ||
| Avalon-ESS-5P2-39.2P2M2 | 39.2 kWh | 10 kVA | ||
| Avalon-ESS-7.6P1-39.2P2M4 | 39.2 kWh | 7.6 kVA | ||
| Avalon-ESS-7.6P2-39.2P1M4 | 39.2 kWh | 15.2 kVA | ||
| Avalon-ESS-7.6P2-39.2P2M2 | 39.2 kWh | 15.2 kVA | ||
| Avalon-ESS-11.4P3-44.1P1M3 | 44.1 kWh | 34.2 kVA | ||
| Avalon-ESS-5P3-44.1P1M3 | 44.1 kWh | 15 kVA | ||
| Avalon-ESS-7.6P3-44.1P1M3 | 44.1 kWh | 22.8 kVA | ||
| Avalon-ESS-11.4P1-49P2M5 | 49 kWh | 11.4 kVA | ||
| Avalon-ESS-11.4P2-49P1M5 | 49 kWh | 22.8 kVA | ||
| Avalon-ESS-5P1-49P2M5 | 49 kWh | 5 kVA | ||
| Avalon-ESS-5P2-49P1M5 | 49 kWh | 10 kVA | ||
| Avalon-ESS-7.6P1-49P2M5 | 49 kWh | 7.6 kVA | ||
| Avalon-ESS-7.6P2-49P1M5 | 49 kWh | 15.2 kVA | ||
| Avalon-ESS-11.4P1-58.8P2M6 | 58.8 kWh | 11.4 kVA | ||
| Avalon-ESS-11.4P2-58.8P1M6 | 58.8 kWh | 22.8 kVA | ||
| Avalon-ESS-11.4P2-58.8P2M3 | 58.8 kWh | 22.8 kVA | ||
| Avalon-ESS-11.4P3-58.8P1M4 | 58.8 kWh | 34.2 kVA | ||
| Avalon-ESS-11.4P3-58.8P2M2 | 58.8 kWh | 34.2 kVA | ||
| Avalon-ESS-5P1-58.8P2M6 | 58.8 kWh | 5 kVA | ||
| Avalon-ESS-5P2-58.8P1M6 | 58.8 kWh | 10 kVA | ||
| Avalon-ESS-5P2-58.8P2M3 | 58.8 kWh | 10 kVA | ||
| Avalon-ESS-5P3-58.8P1M4 | 58.8 kWh | 15 kVA | ||
| Avalon-ESS-5P3-58.8P2M2 | 58.8 kWh | 15 kVA | ||
| Avalon-ESS-7.6P1-58.8P2M6 | 58.8 kWh | 7.6 kVA | ||
| Avalon-ESS-7.6P2-58.8P1M6 | 58.8 kWh | 15.2 kVA | ||
| Avalon-ESS-7.6P2-58.8P2M3 | 58.8 kWh | 15.2 kVA | ||
| Avalon-ESS-7.6P3-58.8P1M4 | 58.8 kWh | 22.8 kVA | ||
| Avalon-ESS-7.6P3-58.8P2M2 | 58.8 kWh | 22.8 kVA | ||
| Avalon-ESS-11.4P3-73.5P1M5 | 73.5 kWh | 34.2 kVA | ||
| Avalon-ESS-5P3-73.5P1M5 | 73.5 kWh | 15 kVA | ||
| Avalon-ESS-7.6P3-73.5P1M5 | 73.5 kWh | 22.8 kVA | ||
| Avalon-ESS-11.4P2-78.4P2M4 | 78.4 kWh | 22.8 kVA | ||
| Avalon-ESS-5P2-78.4P2M4 | 78.4 kWh | 10 kVA | ||
| Avalon-ESS-7.6P2-78.4P2M4 | 78.4 kWh | 15.2 kVA | ||
| Avalon-ESS-11.4P3-88.2P1M6 | 88.2 kWh | 34.2 kVA | ||
| Avalon-ESS-11.4P3-88.2P2M3 | 88.2 kWh | 34.2 kVA | ||
| Avalon-ESS-5P3-88.2P1M6 | 88.2 kWh | 15 kVA | ||
| Avalon-ESS-5P3-88.2P2M3 | 88.2 kWh | 15 kVA | ||
| Avalon-ESS-7.6P3-88.2P1M6 | 88.2 kWh | 22.8 kVA | ||
| Avalon-ESS-7.6P3-88.2P2M3 | 88.2 kWh | 22.8 kVA | ||
| Avalon-ESS-11.4P2-98P2M5 | 98 kWh | 22.8 kVA | ||
| Avalon-ESS-5P2-98P2M5 | 98 kWh | 10 kVA | ||
| Avalon-ESS-7.6P2-98P2M5 | 98 kWh | 15.2 kVA |
Certifications
| Certification | Market | Status | Reference | Valid until |
|---|---|---|---|---|
| UL 9540 | United States and Canada | ✓ Verified 19 October 2026 | Intertek |