EnginStar R300
N/ABatteryRank score
$129.98as of
Insufficient price history← CompareCheck price on Amazon 
Check price on Amazon
EnginStar R300 vs Goal Zero Yeti 300
Decision readout
Better station
Compare the sourced facts — a complete score is not available for both stations.
Better buy today
No price tie-breaker today — choose based on fit and the sourced details.
Goal Zero Yeti 300
71BatteryRank score · Excellent
$349.95as of
Insufficient price historyWhat changes the decision
- Home backup: Goal Zero Yeti 300 — more AC-delivered capacity and higher AC output
- Camping & RV: EnginStar R300 — lighter and easier to carry
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 source
claimed sourcem.media-amazon.com ↗2026-07-27The marketing number — total cell capacity.
AC delivered (est.)
226 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.
Goal Zero Yeti 300
Rated (on the box)
296.96 Wh. Show source
claimed sourcehelp.goalzero.com ↗2026-07-27The marketing number — total cell capacity.
AC delivered (est.)
227 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 | EnginStar R300 | Goal Zero Yeti 300 | Assumption |
|---|---|---|---|
| CPAP (humidifier off) | about 3.1 nights | about 3.2 nights | 9 W · |
| CPAP (heated humidifier on) | about 0.5 nights | about 0.5 nights | 56 W · |
| Refrigerator (full-size) | about 3.6 hours | about 3.6 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 13 hours | about 13 hours | 18 W · |
| Laptop (65W charger) | about 7.0 hours | about 7.0 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 11 full charges | about 11 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 | EnginStar R300 | Goal Zero Yeti 300 |
|---|---|---|
| AC-delivered capacity | 226 Whest.. Show sourceestimated sourcem.media-amazon.com ↗2026-07-27 | 227 Whest.. Show sourceestimated sourcehelp.goalzero.com ↗2026-07-27 |
| Continuous power output | 300 W. Show sourceclaimed sourcem.media-amazon.com ↗ | 350 W. Show sourceclaimed sourcehelp.goalzero.com ↗ |
| Surge power output | 500 W. Show sourceclaimed sourcem.media-amazon.com ↗ | 600 W. Show sourceclaimed sourcehelp.goalzero.com ↗ |
| Max solar input | — | 200 W. Show sourceclaimed sourcehelp.goalzero.com ↗ |
| Weight | 2.95 kg. Show sourceclaimed sourcem.media-amazon.com ↗ | 6.2 kg. Show sourceclaimed sourcehelp.goalzero.com ↗ |
| Rated cycle life | — | 4,000 cycles. Show sourceclaimed sourcehelp.goalzero.com ↗ |
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
EnginStar R300
$129.98as of Insufficient price history
Goal Zero Yeti 300
$349.95as of Insufficient price history
Each verdict compares today's price against that model's own tracked history — never MSRP theater.
Where these rank
- Goal Zero Yeti 300 #1 Small / carry in Best Portable Power Stations · #1 of 10 in Best 300 Wh Stations
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. No price tie-breaker today — choose based on fit and the sourced details.
- Which has more usable capacity, the EnginStar R300 or Goal Zero Yeti 300?
- Neither, in any way you would notice: 226 Wh against 227 Wh is a 0.4% gap, which is smaller than the swing you get from running the same load on a cold morning. Treat them as the same size and decide on output, weight, or today's price instead. Both figures are estimated AC-delivered energy, not the nameplate battery rating — the watt-hours that actually reach your devices.
- 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?
- They run within 0.4% of each other on the same load — about 3.6 hours each on a refrigerator (full-size). Runtime will not separate these two; the deciding factor is somewhere else.
- 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
- Full scorecard, specs & price for EnginStar R300 →
- Full scorecard, specs & price for Goal Zero Yeti 300 →
- See more alternatives to EnginStar R300 →
- See more alternatives to Goal Zero Yeti 300 →
- 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 →