Camping & Overlanding
Car camping, weekend trips and vehicle-based travel
EnginStar · Compact
EnginStar R300 Specs, Price & Buyer Notes
296 Wh of storage, 300 W of continuous AC output, listed at $146.99. That works out to $0.50 per watt-hour and 37.9 watt-hours per pound. Spec figures below are taken from EnginStar’s own product page; WattPicks editors are deep-use experience reviewers, not a pretend third-party lab for every SKU.
296 Wh300 W AC7.8 lb
What this unit is for
We have not yet written a positioning profile for this brand.
Best suited to: General portable power.
Phones, lights, a laptop. Carryable in one hand.
Where to buy
A tracked retailer link appears here only when we have a resolved offer for this model. We do not send readers to a manufacturer store page we cannot attribute.
Safety: lithium power stations store a lot of energy. Follow EnginStar’s charge, ventilation, and storage instructions. WattPicks does not certify electrical installs.
Specifications
3 of 19 fields are published by EnginStar for this model. The rest are shown as “—” and are excluded from rankings rather than estimated.
| Rated Wh (nameplate) | 296 Wh |
|---|---|
| AC output (continuous) | 300 W |
| AC surge | — |
| Power lifting / boost | — |
| Battery chemistry | — |
| Rated cycles | — |
| Weight | 7.8 lb |
| AC recharge to full | — |
| Max solar input | — |
| AC outlets | — |
| USB-C ports | — |
| USB-A ports | — |
| 12V car port | — |
| UPS switchover | — |
| Max expandable capacity | — |
| Warranty | — |
| Noise level | — |
| Ingress protection | — |
| Operating temp (low) | — |
| List price | $146.99 |
Where these numbers come from. WattPicks does not test power stations — this is a spec profile, not a review. Every figure on this page is taken from EnginStar’s own product listing and is stored with the vendor’s exact wording, reproduced below. We do not estimate missing specs — a field the vendor does not publish is shown as “—” and excluded from rankings. Source: EnginStar listing on Amazon.
Vendor wording for each figure (3)
capacityWh: “296 Wh”acOutputW: “300 watts”weight: “7.81 pounds”
EnginStar R300 specs FAQ
What are the EnginStar R300 specs?
296 Wh capacity; 300 W continuous AC; 7.8 lb; listed at $146.99. 3 of 19 fields are published by EnginStar on the product page we read.
How long does the EnginStar R300 last?
The vendor does not publish a cycle rating for this model on the page we read. Runtime is still capacity ÷ load; chemistry and duty cycle decide calendar life.
Can the EnginStar R300 charge from solar?
No maximum solar input is published on the product page we read, so we cannot state a solar ceiling for this model.
Is the EnginStar R300 good value?
At the published list price it works out to $0.50 per watt-hour. Compare that figure on our cost-per-watt-hour ranking rather than price alone.
Still sizing the purchase? How much capacity do I need · Solar charge time · Jackery vs EcoFlow vs BLUETTI
Where it ranks
Specs table →Position among all 137 power stations we track, in each dimension this unit publishes the inputs for.
| Dimension | Rank | Value |
|---|---|---|
| Best value (cost per watt-hour) | #37 of 128 | $0.50 |
| Most portable (Wh per pound) | #50 of 131 | 37.9 Wh/lb |
| Most inverter headroom | #107 of 137 | 101 W/100Wh |
| Most output per dollar | #74 of 137 | 2.04 W/$ |
Fits these buying scenarios
All use cases →Elsewhere in the EnginStar range
All EnginStar models →
Closest rivals by capacity
Other brands’ models nearest in capacity — the units a buyer is most likely to be comparing against this one.
