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The Anker SOLIX C1000 and EcoFlow DELTA 2 are the two most cross-shopped 1 kWh power stations for apartments. They are close on paper but solve slightly different problems. Here is the head-to-head.
The short answer
Get the Anker C1000 if silence matters (bedroom, CPAP, overnight). Get the EcoFlow DELTA 2 if you want maximum expandability and the best app. Both are excellent; for pure value, the Bluetti AC180 actually beats them on capacity and UPS speed.
Spec-by-spec
| Spec | Anker C1000 | EcoFlow DELTA 2 | Winner |
|---|---|---|---|
| Capacity | 1056 Wh | 1024 Wh | C1000 |
| AC output | 1800 W | 1800 W | Tie |
| Surge | 2400 W | 2700 W | DELTA 2 |
| Full recharge | ~58 min | ~50 min | DELTA 2 |
| Noise | Silent below ~350W | Fan sooner | C1000 |
| Expandable | 2112 Wh | 3000 Wh | DELTA 2 |
| App | Good | Best in class | DELTA 2 |
When to pick the C1000
The C1000 is the quietest 1 kWh unit made — the fan stays off below ~350 W. If your unit lives in a bedroom for CPAP, a med fridge, a fan, or an aquarium, that silence is worth more than any spec.
When to pick the DELTA 2
The DELTA 2 wins on expandability (to 3 kWh), recharge speed, and the best app in the class. It is the better pick for a home office that may grow, or for multi-day outage planning.
The value spoiler
If you are not committed to either brand, the Bluetti AC180 offers more capacity (1152 Wh), a faster sub-20 ms UPS, and often a lower sale price. See the AC180 →
Frequently asked questions
Which is quieter, C1000 or DELTA 2?
The C1000, clearly — its fan stays off below ~350 W, making it the better bedroom and overnight unit.
Which lasts longer in an outage?
Marginally the C1000 (1056 vs 1024 Wh), but the DELTA 2 can expand to 3 kWh for true multi-day backup.
Which should I buy?
C1000 for silence, DELTA 2 for expandability and the app. Or the AC180 for the best overall value.
Related guides
- Anker SOLIX C1000 Review (Quietest 1 kWh for Apartments)
- EcoFlow DELTA 2 vs BLUETTI AC180 for Apartment Backup
- EcoFlow DELTA 2 Review for Renters & Home Office
- EcoFlow RIVER 2 Pro vs BLUETTI EB70S for Renters
Quiet vs flexible
Pick the Anker C1000 for silence, the EcoFlow DELTA 2 for expandability — or the Bluetti AC180 if you want the best value of all three.