EcoFlow DELTA Pro Ultra vs Anker SOLIX F3800 Plus
Two of the home backup power stations (3 kwh+) in our best home backup power stations and whole-home batteries comparison, lined up spec by spec. Every figure comes from the manufacturer pages linked below, and the scores use the same published formula as the full ranking.
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Best for: A modular 6 kWh inverter-and-battery system for whole-home backup
Check price at AmazonBest for: 6,000 W at 120/240 V and 3,200 W solar
Check price at AmazonSpec-by-spec comparison
Green marks the better published figure. "Not listed" means the manufacturer doesn't publish it.
| Spec | EcoFlow DELTA Pro Ultra | Anker SOLIX F3800 Plus | Weight |
|---|---|---|---|
| Battery capacityUsable runtime scales with watt-hours. A 1,000 Wh station runs a 100 W load for roughly 8–9 hours once inverter losses are counted. | 6144 Wh | 3840 Wh | 25% |
| Continuous AC outputThe rated (continuous) inverter output decides which appliances you can plug in. We use the rated figure, not surge or 'boost' modes. | 7200 W | 6000 W | 20% |
| Max solar inputHigher solar input means faster recharging off-grid, if you have enough panels to use it. | 5600 W | 3200 W | 15% |
| WeightLighter is easier to carry to a campsite or between rooms. | 82.4 kg | 62 kg | 10% |
| Max AC charging powerMore AC input watts means a faster wall recharge before a trip or storm. | Not listed | 1800 W | 5% |
| 240 V output (listed)240 V output runs well pumps, dryers and other 240 V circuits through a transfer switch or home panel. We mark Yes only when the maker lists 240 V output on the unit itself. | Yes | Yes | 10% |
| Rated cycle lifeHow many full cycles the maker rates the battery for. Thresholds differ (70% vs 80% remaining capacity), so read the note under each product. | 3500 cycles | 3000 cycles | 10% |
| Surge / peak outputShort bursts for motor start-up (fridges, pumps). Skipped when the maker doesn't publish a surge figure. | 10800 W | Not listed | 5% |
| Capacity | 6,144 Wh per battery; 30 kWh with five batteries per inverter | Not listed | info |
| Chemistry | LFP | LFP | info |
| Cycle rating | 80% capacity after 3,500 cycles | 3,000+ cycles | info |
| AC output | Pure sine, 7,200 W, 120/240 V; 10.8 kW surge | 6,000 W total; NEMA 5-20R 120 V outlets, TT-30R (3,000 W) and L14-30R 120/240 V (6,000 W) | info |
| Solar input | 5,600 W total (High-PV 4,000 W + Low-PV 1,600 W) | 2 inputs, 11–165 V, 1,600 W each (3,200 W) | info |
| UPS | Backup UPS under 20 ms; online UPS 0 ms on listed outlets | Not listed | info |
| Weight | Inverter 31.7 kg + battery 50.7 kg (82.4 kg combined, our sum) | 136.7 lb | info |
| Connectivity | Bluetooth, Wi-Fi and 4G | Not listed | info |
| AC input | Not listed | 1,800 W wall charging; 6,000 W 240 V generator bypass with Anker's Generator Adapter | info |
| Expansion | Not listed | Up to 6 × BP3800 (3.84 kWh each); up to 53.8 kWh per Anker | info |
| Warranty | Not listed | 5 years | info |
| VoltPick score | 7.7/10 | 4.7/10 | 100% |
Where each one comes out ahead
EcoFlow DELTA Pro Ultra
Better published figure on: Battery capacity, Continuous AC output, Max solar input, Rated cycle life.
What we like
- Biggest capacity and output here
- 5,600 W solar input
- 0 ms online UPS outlets
- Expands to 90 kWh in multi-inverter systems
Watch out for
- Two heavy modules (82.4 kg together)
- Built around EcoFlow's home panels for full-home use
Anker SOLIX F3800 Plus
Better published figure on: Weight.
What we like
- 6,000 W at 120/240 V
- 3,200 W solar input
- Expands with six BP3800 batteries
Watch out for
- Heaviest single unit here (136.7 lb)
- No surge figure on the spec table
Verdict
On published specs, the EcoFlow DELTA Pro Ultra scores higher (7.7 vs 4.7). Specs don't capture sound character or feel, so weigh the pros and cons above too.
- Choose the EcoFlow DELTA Pro Ultra if this sounds like you: a modular 6 kWh inverter-and-battery system for whole-home backup.
- Choose the Anker SOLIX F3800 Plus if this sounds like you: 6,000 W at 120/240 V and 3,200 W solar.
- EcoFlow DELTA Pro Ultra: EcoFlow: DELTA Pro Ultra specs
- Anker SOLIX F3800 Plus: Anker SOLIX: F3800 Plus tech specs