EcoFlow DELTA Pro Ultra X
12288 Wh, 12000 W
Bluetti EP800
Home battery · EP800. Specs from the manufacturer page (checked ).
The Bluetti EP800 is a 9920 Wh home energy storage system with 7600 W output. It combines the EP800 off-grid inverter with B500 battery packs, and its capacity can be scaled up to 39,860 Wh.
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Capacity
9920Wh
Continuous
7600W
Chemistry
LiFePO4
Expandable
Yes
Warranty
10yr
Key features
- LiFePO4 battery chemistry
- Instant energy backup in 20 ms
- Can be installed and running in about 2 hours
- 4 working modes: Backup, Self-consumption, Time of Use, or Custom
- Remote control and real-time energy statistics
- Integrates with solar, grid, and generator
- NEMA 4X water and dust resistance
- Operating range 4°F to 104°F / -20°C to 40°C
- 10-year warranty
What it is for
- Home backup
Specifications
| Capacity | 9920 Wh |
|---|---|
| Continuous output | 7600 W |
| Expandable | Yes |
| Battery chemistry | LiFePO4 |
| Warranty | 10 years |
From the Bluetti page. Values the manufacturer does not publish are left out.
How long it runs common appliances
| Appliance | Watts | Runs? | Hours |
|---|---|---|---|
| Refrigerator (with freezer) | 120 W (600 start) | yes | 7.8 days |
| Chest freezer | 100 W (500 start) | yes | 10.9 days |
| CPAP (no humidifier) | 35 W (40 start) | yes | 9.4 days |
| Gas boiler (pump + controls) | 120 W (300 start) | yes | 5.5 days |
| Wi-Fi router + modem/ONU | 12 W | yes | 27.3 days |
| Starlink (standard dish) | 60 W (100 start) | yes | 5.5 days |
| TV 50" | 75 W | yes | 4.4 days |
| Sump pump 1/2 HP | 920 W (2150 start) | yes | 8.5 h |
| Well pump 1/2 HP | 880 W (2000 start) | yes | 8.9 h |
| Space heater 1500 W | 1500 W | yes | 7.5 h |
Assumes 88 % inverter efficiency, 90 % usable capacity and typical duty cycles. Build your own list in the calculator.
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On our lists
Connection and wiring
Follow the diagrams in the Bluetti manual. Connecting to a home panel needs a transfer switch or interlock and a licensed electrician.
Open the Bluetti manual (PDF) →
Error codes and troubleshooting
| Code | Meaning | What to do | Manual page |
|---|---|---|---|
| B017 | PV1 input current is too high. The manual states PV1 must stay within 12.5A. | Log in to the App, bind the EP800, and connect via Bluetooth to check for firmware updates. Confirm PV1 input current is below 12.5A using the App's real-time monitor. Restart the EP800. If the issue persists, contact BLUETTI support. Call service if it persists. | 68 |
| B018 | PV2 input current is too high. The manual states PV2 must stay within 25A. | Log in to the App, bind the EP800, and connect via Bluetooth to check for firmware updates. Confirm PV2 input current is below 25A using the App's real-time monitor. Restart the EP800. If the issue persists, contact BLUETTI support. Call service if it persists. | 68 |
| B019 | PV1 input voltage is too high. The total open-circuit voltage must stay within 500V. | Immediately turn off the PV input switch. Check that the total open-circuit voltage is within 500V. If not, reduce the number of PV modules connected in series. The inverter resumes automatically after correction. Restart the EP800. If the issue persists, contact BLUETTI support. Call service if it persists. | 68 |
| B020 | PV2 input voltage is too high. The total open-circuit voltage must stay within 500V. | Immediately turn off the PV input switch. Check that the total open-circuit voltage is within 500V. If not, reduce the number of PV modules connected in series. The inverter resumes automatically after correction. Restart the EP800. If the issue persists, contact BLUETTI support. Call service if it persists. | 68 |
| B031 | The grid phase connection is wrong. Mains L1 and L2 may be incorrectly connected to the EP800 GRID terminals. | On first installation, connect mains L1 and L2 correctly to the EP800 GRID terminals. Switch both mains phases on or off simultaneously. Restart the EP800. If the issue persists, contact BLUETTI support. Call service if it persists. | 68 |
From the Bluetti manual. All 5 EP800 codes →
FAQ
How long will the Bluetti EP800 run a refrigerator?
About 187 hours for a typical 120 W refrigerator that runs 35 % of the time, after inverter and depth-of-discharge losses.
Can the Bluetti EP800 start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 7600 W output (no separate peak published). That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.