Anker SOLIX C300
62BatteryRank score · Balanced
$299.99as of
High price← CompareCheck price on Amazon 
Check price on Amazon
Anker SOLIX C300 vs Marbero M823
Decision readout
Better station
Anker SOLIX C300 leads by 36 points overall.
Better buy today
No purchase urgency: the performance leader is not at a Good or Great price today.
Marbero M823
26BatteryRank score · Limited
$143.99as of
Insufficient price historyWhat changes the decision
- Home backup: Anker SOLIX C300 — more AC-delivered capacity
- Camping & RV: Marbero M823 — lighter and easier to carry
01 · Score evidence
Score breakdown
62
Anker SOLIX C300
Overall
26
Marbero M823
51
POWER
Anker SOLIX C300 +30
21
Battery-side usable capacity and how much you can run at once.
77
TRUST
Incomplete data
N/A
Owner reputation, safety record, warranty, and build durability.
N/A
CHARGING
Incomplete data
5
Wall and solar recharge speed.
58
LIVABILITY
Marbero M823 +33
91
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
Marbero M823
Rated (on the box)
237 Wh. Show source
claimed sourcemarbero.com ↗2026-07-27The marketing number — total cell capacity.
AC delivered (est.)
181 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 | Marbero M823 | Assumption |
|---|---|---|---|
| CPAP (humidifier off) | about 3.7 nights | about 2.5 nights | 9 W · |
| CPAP (heated humidifier on) | about 0.6 nights | about 0.4 nights | 56 W · |
| Refrigerator (full-size) | about 4.3 hours | about 2.9 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 15 hours | about 10 hours | 18 W · |
| Laptop (65W charger) | about 8.3 hours | about 5.6 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 13 full charges | about 9 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 | Marbero M823 |
|---|---|---|
| AC-delivered capacity | 269 Whverified. Show sourceverified source~269 Wh usable via USB at 60W (Trusted Reviews)2026-07-04 | 181 Whest.. Show sourceestimated sourcemarbero.com ↗2026-07-27 |
| Continuous power output | 300 W. Show sourceclaimed sourceankersolix.com ↗ | 300 W. Show sourceclaimed sourcemarbero.com ↗ |
| Surge power output | 600 W. Show sourceclaimed sourceankersolix.com ↗ | 375 W. Show sourceclaimed sourcemarbero.com ↗ |
| Max solar input | 100 W. Show sourceclaimed sourceankersolix.com ↗ | — |
| AC charge time (0–100%) | — | 360 min. Show sourceclaimed sourcemarbero.com ↗ |
| Weight | 4.1 kg. Show sourceclaimed sourceankersolix.com ↗ | 2.09 kg. Show sourceclaimed sourcemarbero.com ↗ |
| Rated cycle life | 3,000 cycles. Show sourceclaimed sourceankersolix.com ↗ | — |
Only show differences
- AC-delivered capacity269 Wh181 Wh
- Surge power output600 W375 W
- Max solar input100 W—
- AC charge time (0–100%)—360 min
- Weight4.1 kg2.09 kg
- Rated cycle life3,000 cycles—
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.
05 · Tracked street price
Price & fair-price verdict
Marbero M823
$143.99as of Insufficient price history
Each verdict compares today's price against that model's own tracked history — never MSRP theater.
Where these rank
- Anker SOLIX C300 #4 of 8 in Quietest Power Stations · #4 of 10 in Best 300 Wh Stations
Quick answers
- Is the Anker SOLIX C300 better than the Marbero M823?
- Anker SOLIX C300 leads by 36 points overall. No purchase urgency: the performance leader is not at a Good or Great price today.
- Which has more usable capacity, the Anker SOLIX C300 or Marbero M823?
- The Anker SOLIX C300, by 88 Wh — 269 Wh versus 181 Wh, a 49% advantage. At a 60 W load that is roughly 1.5 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 Marbero M823?
- 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 375 W, and surge is what decides whether a compressor or pump actually starts.
- How does runtime compare between the Anker SOLIX C300 and Marbero M823?
- On the same sourced load — a refrigerator (full-size) — the Anker SOLIX C300 runs longer: 4.3 hours against 2.9. 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 Marbero M823?
- The Marbero M823, by 2 kg (2.1 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 Marbero M823 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 Marbero M823 →
- See more alternatives to Anker SOLIX C300 →
- See more alternatives to Marbero M823 →
- 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 →