EnginStar R300 Portable Power Station, 296Wh, 300W

1 / 7

Product guide

EnginStar R300 Portable Power Station, 296Wh, 300W

Portable: EnginStar R300 is a compact battery power station listed with 296Wh capacity and 300W output. Its two pure-sine-wave AC outlets and multiple USB and DC outputs suit lower-draw devices on camping trips, but the 300W ceiling rules out many high-demand appliances.

At a glance

Two pure-sine-wave AC outlets plus USB and 12V/24V DC connections support a range of smaller devices.
The listing describes AC wall, car and compatible solar-panel charging. The solar panel is sold separately according to the product description.
A stated 300W AC output limits use to devices drawing less than 300W. The listing cautions against appliances such as microwaves, heaters and refrigerators.

Price

$132.99Save 11%

Reference price: ~~$149.99~~

Price checked: Nov 13, 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

EnginStar Carrying Case Storage box 300W Power Station,Travel Business Lunch Bag, Shockproof Universal Compatible for Portable Power Station, Picnic Camping Wild Fishing Hunting

$21.99

Pros and cons

Pros

Compact listed dimensions and a weight of 6.5 pounds support transport for camping and road trips.
Multiple AC, USB and DC output types let the unit power or charge several kinds of devices.
The manufacturer gives an estimated seven-hour full recharge using the AC adapter.

Cons

The stated 300W output and 296Wh capacity limit it to lower-demand equipment and shorter-duration backup compared with larger power needs.
The USB-C output is listed as 18W, and the product description says it may not support laptops over USB-C.

Technical specifications

16 specifications

Identity
Brand	EnginStar
Model	R300

Power and battery
Power configuration	Battery-Powered/ Solar Powered
Battery capacity	296Wh
AC output	300W/110V pure sine wave/60HZ
USB output	5V/3.1A
USB-C output	5V/3A, 9V/2A, 12V/1.5A
DC output	12V/8A, 24V/3A

Ports and charging
AC outlets	2
USB-C output rating	18W
AC recharge time	fully charge in 7 hours
Solar input compatibility	12-25V solar panel

Dimensions and installation
Weight listed	6.5 pounds
Dimensions	9x 5.5x 7.6 in

Operating conditions
Operating temperature	-4-113°F (-20-45℃)
Recharging temperature	32-113°F (0-45°C)

What to know before buying

The stated estimate for AC runtime uses 296Wh × 0.85 divided by device wattage. Actual runtime depends on the connected load. The listing recommends periodic recharging during storage and keeping the unit away from water and fire.

Listing details to confirm

The listing conflicts on capacity phrasing, describing the unit as 296Wh in some places and 300 watt-hours elsewhere. It also gives dimensions as 9"L x 5.5"W x 7.5"H in details but 9x 5.5x 7.6 in in the product description. The component listing names a solar panel, while the product description says it is sold separately, so confirm the selected package contents. Listed charging and operating temperature ranges differ and should be checked against the intended conditions.

What’s in the box

Solar panelCheck selected pack
Charging cordIncluded
User manualCheck selected pack
Home chargerCheck selected pack
Car charger cableCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Campers and travelers who want a portable source for phones, lights and other devices below the stated output limit.
Buyers who need both AC outlets and USB or DC connections in a compact battery unit.
Users who can recharge from a wall outlet, car charger or separately sourced compatible solar panel.

Less suited to

People needing to run appliances listed as unsupported, such as an electric grill, induction cooker, microwave, refrigerator or heater.
Buyers who need USB-C laptop charging or more than 300W AC output.
Anyone relying on a solar panel being included without first confirming the selected package.

EnginStar R300 Portable Power Station, 296Wh, 300W · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 1,947 ratings

5 stars71%71%
4 stars10%10%
3 stars5%5%
2 stars3%3%
1 star11%11%

Customer feedback commonly describes the unit as compact and useful for camping and travel, with some reports of powering campsites or a laptop for several hours. Those impressions fit its portable form and several output types, but do not establish runtime for a particular device. Reports on charging speed and battery life vary, from nearly three nights per charge to much shorter use or charging problems. Opinions on value are also divided, so consider the 296Wh capacity and 300W output limits against the devices and duration you need.

Positive themes

Customers describe it as compact and easy to transport for camping and travel.
Some customers report useful power for campsite equipment and laptops.

Mixed feedback

Customers report mixed charging speed and battery-life experiences, including both multi-night use and much shorter runtimes or charging issues.
Value-for-money opinions are divided.

Frequently asked questions

What devices can the EnginStar R300 power?

The listing specifies 300W AC output and says connected AC devices must draw less than 300W. Check a device's operating wattage before use. It cautions against appliances such as microwaves, heaters and refrigerators.

Can it charge a laptop through USB-C?

The listing gives USB-C output as 18W and says that this port may not support laptops. It recommends using an AC outlet for laptop charging.

Is a solar panel included?

The listing's component field names a solar panel, but its product description says the panel is sold separately. Confirm the selected listing's contents before buying.

How long does recharging take?

The product description claims a full recharge in seven hours using the AC wall adapter. It also describes car charging and compatible 12-25V solar input, without specifying recharge times for those methods.