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Anker SOLIX C300 vs EnginStar R300

Anker SOLIX C300 — front view

Anker SOLIX C300

62BatteryRank score · Balanced
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Decision readout
Better station

Compare the sourced facts — a complete score is not available for both stations.

EnginStar R300 — front view

EnginStar R300

N/ABatteryRank score
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What changes the decision

By the BatteryRank Engineering Team

01 · Score evidence

Score breakdown

62
Anker SOLIX C300
Overall
N/A
EnginStar R300
51
POWER
Anker SOLIX C300 +7
44

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
N/A

Wall and solar recharge speed.

58
LIVABILITY
EnginStar R300 +14
72

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 sourceclaimed sourceankersolix.com ↗2026-07-04

The marketing number — total cell capacity.

AC deliveredmeasured
269 Wh. Show sourceverified 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

EnginStar R300
Rated (on the box)
296 Wh. Show sourceclaimed sourcem.media-amazon.com ↗2026-07-27

The marketing number — total cell capacity.

AC delivered (est.)
226 Wh. Show sourceestimated sourceestimate = battery-side usable capacity × 85% inverter efficiency

What reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.

03 · Same assumptions

Same-device runtime

Estimated runtime for the same sourced devices on Anker SOLIX C300 and EnginStar R300
DeviceAnker SOLIX C300EnginStar R300Assumption
CPAP (humidifier off)about 3.7 nightsabout 3.1 nights9 W ·
CPAP (heated humidifier on)about 0.6 nightsabout 0.5 nights56 W ·
Refrigerator (full-size)about 4.3 hoursabout 3.6 hours180 W × 35% duty cycle ·
Wi-Fi router + modemabout 15 hoursabout 13 hours18 W ·
Laptop (65W charger)about 8.3 hoursabout 7.0 hours65 W × 50% duty cycle ·
Phone (one full charge)about 13 full chargesabout 11 full charges20 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

Key sourced specifications for Anker SOLIX C300 and EnginStar R300
SpecAnker SOLIX C300EnginStar R300
AC-delivered capacity
269 Whverified. Show sourceverified source~269 Wh usable via USB at 60W (Trusted Reviews)2026-07-04
226 Whest.. Show sourceestimated sourcem.media-amazon.com ↗2026-07-27
Continuous power output
300 W. Show sourceclaimed sourceankersolix.com ↗2026-07-04
300 W. Show sourceclaimed sourcem.media-amazon.com ↗2026-07-27
Surge power output
600 W. Show sourceclaimed sourceankersolix.com ↗2026-07-04
500 W. Show sourceclaimed sourcem.media-amazon.com ↗2026-07-27
Max solar input
100 W. Show sourceclaimed sourceankersolix.com ↗2026-07-04
—
Weight
4.1 kg. Show sourceclaimed sourceankersolix.com ↗2026-07-04
2.95 kg. Show sourceclaimed sourcem.media-amazon.com ↗2026-07-27
Rated cycle life
3,000 cycles. Show sourceclaimed sourceankersolix.com ↗2026-07-04
—
Only show differences
  • AC-delivered capacity269 Wh226 Wh
  • Surge power output600 W500 W
  • Max solar input100 W—
  • Weight4.1 kg2.95 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.

Where these rank

Where to buy

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Quick answers

Is the Anker SOLIX C300 better than the EnginStar R300?
Compare the sourced facts — a complete score is not available for both stations.
Which has more usable capacity, the Anker SOLIX C300 or EnginStar R300?
The Anker SOLIX C300, by 43 Wh — 269 Wh versus 226 Wh, a 19% advantage. At a 60 W load that is roughly 0.7 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 EnginStar R300?
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 500 W, and surge is what decides whether a compressor or pump actually starts.
How does runtime compare between the Anker SOLIX C300 and EnginStar R300?
On the same sourced load — a refrigerator (full-size) — the Anker SOLIX C300 runs longer: 4.3 hours against 3.6. 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 EnginStar R300?
The EnginStar R300, by 1.1 kg (3 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 EnginStar R300 for camping & rv. They split, so the honest answer depends on which of those you are actually buying for.

Keep deciding

Scores computed from sourced data · prices timestamped · tap or focus a figure to view its source

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