EnginStar R300
#22 in SmallFull review
A cheap, light 296Wh station for phones, cameras, CPAP and small camping loads. Buyers who will cycle it often should pay a little more for a LiFePO4 model with a longer warranty.
Amazon $149.99$149.99
The EnginStar R300 is the better portable power station overall, rated 3.4 to 3.2. The EnginStar R300 leads on AC output and value. The EcoFlow TRAIL Plus 300 DC wins on features. The EnginStar R300 costs $49.01 less ($149.99 vs $199).
EcoFlow TRAIL Plus 300 DC
#24 in SmallFull review
A light DC-only station for campers who want a built-in light and app control. Choose the TRAIL 300 DC instead if long battery life matters more than weight.
Amazon $199$199
Prices were last checked October 24, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the EnginStar R300 for AC output (300 W continuous AC vs No AC outlets (DC only)) and value ($0.51 per rated Wh vs $0.69 per rated Wh).
- Choose the EcoFlow TRAIL Plus 300 DC for features (140 W USB-C, app vs no UPS, expansion or app).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every small portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | EnginStar R300 | EcoFlow TRAIL Plus 300 DC |
|---|---|---|
| Overall rating | 3.4/5 | 3.2/5 |
| Value 25% | 95 $0.51 per rated Wh | 79 $0.69 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 50 not yet independently tested (neutral score used) |
| Battery life 15% | 19 Lithium-ion, 1,000 cycles, 1-year warranty | 20 NCM, 3-year warranty |
| AC output 15% | 41 300 W continuous AC | 0 No AC outlets (DC only) |
| Charging speed 10% | 0 0-100% on AC in 7 h | 50 full AC charge time not published (neutral score used) |
| Portability 10% | 100 100 Wh per kg (6.5 lb (3 kg)) | 100 127 Wh per kg (5 lb (2.3 kg)) |
| Solar input 5% | 50 solar input not published (neutral score used) | 27 110 W max solar input |
| Features 5% | 0 no UPS, expansion or app | 40 140 W USB-C, app |
Specifications
| EnginStar R300 | EcoFlow TRAIL Plus 300 DC | |
|---|---|---|
| Battery | ||
| Rated capacity | 296 Wh | 288 Wh |
| Chemistry | Lithium-ion | NCM |
| Cycle life | 1,000 >1000 cycles per the manual; end-of-life capacity not stated | - |
| Expandable | - | No |
| Output | ||
| AC output | 300 W | None (DC only) |
| AC outlets | 2 total | 0 |
| 120V 15A outlets (NEMA 5-15R) | 2 | - |
| AC waveform | Pure sine wave | - |
| USB-C ports | 1 (18 W) | 3 (up to 140 W each) |
| USB-A ports | 2 | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | 0 |
| UPS / pass-through | - | No |
| Charging | ||
| AC charging | 65 W | - |
| Full AC charge time | 7 h (About 7 hours per the manual and the B09SHB84J2 listing; a listing image says 5-7 hr. Another EnginStar listing (B0FJD7LCY4) claims 80% in 2 hours, which doesn't fit a 65W input and isn't used here.) | - |
| Max solar input | - | 110 W |
| Solar input voltage | 12-25V | - |
| Car charging | - | 110 W |
| Build | ||
| Weight | 6.5 lb (3 kg) | 5 lb (2.3 kg) |
| Dimensions | 9.06 x 7.64 x 5.51 in | 8.11 x 4.53 x 4.84 in |
| App | - | EcoFlow app |
| Warranty | 1 years | 3 years |
| Released | 2024-05 | 2025-08 |