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EnginStar R300 vs Goal Zero Yeti 300

EnginStar R300 — front view

EnginStar R300

N/ABatteryRank score
Check price on Amazon
Decision readout
Better station

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

Goal Zero Yeti 300 — front view

Goal Zero Yeti 300

71BatteryRank score · Excellent
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What changes the decision

By the BatteryRank Engineering Team

01 · Score evidence

Score breakdown

N/A
EnginStar R300
Overall
71
Goal Zero Yeti 300
44
POWER
Goal Zero Yeti 300 +23
67

Battery-side usable capacity and how much you can run at once.

N/A
TRUST
Incomplete data
98

Owner reputation, safety record, warranty, and build durability.

N/A
CHARGING
Incomplete data
91

Wall and solar recharge speed.

72
LIVABILITY
EnginStar R300 +68
4

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.

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.

Goal Zero Yeti 300
Rated (on the box)
296.96 Wh. Show sourceclaimed sourcehelp.goalzero.com ↗2026-07-27

The marketing number — total cell capacity.

AC delivered (est.)
252 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 EnginStar R300 and Goal Zero Yeti 300
DeviceEnginStar R300Goal Zero Yeti 300Assumption
CPAP (humidifier off)about 3.1 nightsabout 3.5 nights9 W ·
CPAP (heated humidifier on)about 0.5 nightsabout 0.6 nights56 W ·
Refrigerator (full-size)about 3.6 hoursabout 4.0 hours180 W × 35% duty cycle ·
Wi-Fi router + modemabout 13 hoursabout 14 hours18 W ·
Laptop (65W charger)about 7.0 hoursabout 7.8 hours65 W × 50% duty cycle ·
Phone (one full charge)about 11 full chargesabout 12 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 EnginStar R300 and Goal Zero Yeti 300
SpecEnginStar R300Goal Zero Yeti 300
AC-delivered capacity
226 Whest.. Show sourceestimated sourcem.media-amazon.com ↗2026-07-27
252 Whest.. Show sourceestimated sourcehelp.goalzero.com ↗2026-07-27
Continuous power output
300 W. Show sourceclaimed sourcem.media-amazon.com ↗2026-07-27
350 W. Show sourceclaimed sourcehelp.goalzero.com ↗2026-07-27
Surge power output
500 W. Show sourceclaimed sourcem.media-amazon.com ↗2026-07-27
600 W. Show sourceclaimed sourcehelp.goalzero.com ↗2026-07-27
Max solar input—
200 W. Show sourceclaimed sourcehelp.goalzero.com ↗2026-07-27
Weight
2.95 kg. Show sourceclaimed sourcem.media-amazon.com ↗2026-07-27
6.2 kg. Show sourceclaimed sourcehelp.goalzero.com ↗2026-07-27
Rated cycle life—
4,000 cycles. Show sourceclaimed sourcehelp.goalzero.com ↗2026-07-27

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 EnginStar R300 better than the Goal Zero Yeti 300?
Compare the sourced facts — a complete score is not available for both stations.
Which has more usable capacity, the EnginStar R300 or Goal Zero Yeti 300?
The Goal Zero Yeti 300, by 26 Wh — 226 Wh versus 252 Wh, a 12% advantage. At a 60 W load that is roughly 0.4 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 EnginStar R300 or Goal Zero Yeti 300?
The Goal Zero Yeti 300: 300 W versus 350 W continuous. That gap matters only if a load sits between the two numbers — below 300 W both run it, above 350 W neither does. Surge headroom follows the same order: 500 W against 600 W, and surge is what decides whether a compressor or pump actually starts.
How does runtime compare between the EnginStar R300 and Goal Zero Yeti 300?
On the same sourced load — a refrigerator (full-size) — the Goal Zero Yeti 300 runs longer: 4 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 EnginStar R300 or Goal Zero Yeti 300?
The EnginStar R300, by 3.3 kg (3 kg versus 6.2 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 Goal Zero Yeti 300 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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