Anker SOLIX C300
62BatteryRank score · Balanced
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Anker SOLIX C300 vs EcoFlow RIVER 3
Decision readout
Better station
Anker SOLIX C300 takes capacity and output, EcoFlow RIVER 3 takes weight and noise — the decision is which of those you need, not overall quality. If neither is your constraint, the composite tiebreak goes to Anker SOLIX C300 by 7 points — a hair, not a mandate.
- powerAnker SOLIX C300+19269 Wh vs 208 Wh delivered
- livabilityEcoFlow RIVER 3+63.5 kg vs 4.1 kg
EcoFlow RIVER 3
55BatteryRank score · Balanced
What changes the decision
- Home backup: Anker SOLIX C300 — more AC-delivered capacity
- Camping & RV: EcoFlow RIVER 3 — lighter and easier to carry
By the BatteryRank Engineering Team
01 · Score evidence
Score breakdown
62
Anker SOLIX C300
Overall
55
EcoFlow RIVER 3
51
POWER
Anker SOLIX C300 +19
32
Battery-side usable capacity and how much you can run at once.
77
TRUST
Anker SOLIX C300 +3
74
Owner reputation, safety record, warranty, and build durability.
N/A
CHARGING
Incomplete data
63
Wall and solar recharge speed.
58
LIVABILITY
EcoFlow RIVER 3 +6
64
Lightweight, portable, and quiet enough to live with.
Computed from sourced data with a published, price-independent formula. Scores are relative to each model's size class.
02 · Usable energy
Capacity truth
The watt-hours on the box aren't what reaches your devices. Same scale, both units.
Anker SOLIX C300
Rated (on the box)
288 Wh. Show source
claimed sourceankersolix.com ↗2026-07-04The marketing number — total cell capacity.
AC deliveredmeasured
269 Wh. Show source
verified source~269 Wh usable via USB at 60W (Trusted Reviews)2026-07-04~269 Wh usable via USB at 60W (Trusted Reviews) · 7% below the label
EcoFlow RIVER 3
Rated (on the box)
245 Wh. Show source
claimed sourceus.ecoflow.com ↗2026-07-04The marketing number — total cell capacity.
AC delivered (est.)
208 Wh. Show source
estimated sourceestimate = battery-side usable capacity × 85% inverter efficiencyWhat reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.
03 · Same assumptions
Same-device runtime
| Device | Anker SOLIX C300 | EcoFlow RIVER 3 | Assumption |
|---|---|---|---|
| CPAP (humidifier off) | about 3.7 nights | about 2.9 nights | 9 W · |
| CPAP (heated humidifier on) | about 0.6 nights | about 0.5 nights | 56 W · |
| Refrigerator (full-size) | about 4.3 hours | about 3.3 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 15 hours | about 12 hours | 18 W · |
| Laptop (65W charger) | about 8.3 hours | about 6.4 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 13 full charges | about 10 full charges | 20 W · |
One device at a time; estimates use each station's usable AC energy. Build your own load →
04 · Sourced hardware
Key specs, side by side
| Spec | Anker SOLIX C300 | EcoFlow RIVER 3 |
|---|---|---|
| AC-delivered capacity | 269 Whverified. Show sourceverified source~269 Wh usable via USB at 60W (Trusted Reviews)2026-07-04 | 208 Whest.. Show sourceestimated sourceus.ecoflow.com ↗2026-07-04 |
| Continuous power output | 300 W. Show sourceclaimed sourceankersolix.com ↗2026-07-04 | 300 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 |
| Surge power output | 600 W. Show sourceclaimed sourceankersolix.com ↗2026-07-04 | 600 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 |
| Max solar input | 100 W. Show sourceclaimed sourceankersolix.com ↗2026-07-04 | 110 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 |
| AC charge time (0–100%) | — | 60 min. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 |
| Weight | 4.1 kg. Show sourceclaimed sourceankersolix.com ↗2026-07-04 | 3.54 kg. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 |
| Rated cycle life | 3,000 cycles. Show sourceclaimed sourceankersolix.com ↗2026-07-04 | 3,000 cycles. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 |
Only show differences
- AC-delivered capacity269 Wh208 Wh
- Max solar input100 W110 W
- AC charge time (0–100%)—60 min
- Weight4.1 kg3.54 kg
Manufacturer figures unless marked verified or est. Tap or focus a figure to view its source. The better reading in each row is highlighted — lower wins for weight and recharge time.
Where these rank
- Anker SOLIX C300 #4 of 8 in Quietest Power Stations · #4 of 10 in Best 300 Wh Stations
- EcoFlow RIVER 3 #5 of 10 in Best 300 Wh Stations · #8 of 8 in Quietest Power Stations
Where to buy
Affiliate links: we may earn a commission if you buy, at no extra cost to you. Commission never affects our rankings.
Anker SOLIX C300
EcoFlow RIVER 3
Quick answers
- Is the Anker SOLIX C300 better than the EcoFlow RIVER 3?
- Anker SOLIX C300 takes capacity and output, EcoFlow RIVER 3 takes weight and noise — the decision is which of those you need, not overall quality. If neither is your constraint, the composite tiebreak goes to Anker SOLIX C300 by 7 points — a hair, not a mandate.
- Which has more usable capacity, the Anker SOLIX C300 or EcoFlow RIVER 3?
- The Anker SOLIX C300, by 61 Wh — 269 Wh versus 208 Wh, a 29% advantage. At a 60 W load that is roughly 1 extra hours before the battery is empty. Both figures are estimated AC-delivered energy, not the nameplate battery rating — the watt-hours that actually reach your devices, which is always less than the number on the box.
- Which has more AC output, the Anker SOLIX C300 or EcoFlow RIVER 3?
- Neither — both are rated 300 W continuous, so any load one can run, the other can too. Surge headroom follows the same order: 600 W against 600 W, and surge is what decides whether a compressor or pump actually starts.
- How does runtime compare between the Anker SOLIX C300 and EcoFlow RIVER 3?
- On the same sourced load — a refrigerator (full-size) — the Anker SOLIX C300 runs longer: 4.3 hours against 3.3. These are planning estimates from each model's AC-delivered capacity, not stopwatch tests; real duty cycle and temperature move them.
- Which is lighter, the Anker SOLIX C300 or EcoFlow RIVER 3?
- The EcoFlow RIVER 3, by 0.6 kg (3.5 kg versus 4.1 kg). Both weights are manufacturer figures for the bare unit; cables and a solar panel add to whatever you actually carry.
- Which model should I buy for my use case?
- On the sub-scores that describe each use case: the Anker SOLIX C300 for home backup; the EcoFlow RIVER 3 for camping & rv. They split, so the honest answer depends on which of those you are actually buying for.
Keep deciding
- Full scorecard, specs & price for Anker SOLIX C300 →
- Full scorecard, specs & price for EcoFlow RIVER 3 →
- See more alternatives to Anker SOLIX C300 →
- See more alternatives to EcoFlow RIVER 3 →
- What size do you need? →
- Browse all rankings →
- Check device runtime evidence →
- Compare outage and trip load plans →
- Browse complete power kits →
- Capacity vs output explained →
- Battery cycle-life thresholds →
- UPS behavior explained →