Power station runtime cards to print and lend
Free printable cards for Jackery Explorer 300 v2, Jackery Explorer 1000 v2, EcoFlow RIVER 3 Plus: hours for a fridge, a CPAP and an electric blanket, from stated watts and capacity.
Runtimes are arithmetic from maker-stated capacity and device watts, with every assumption printed on the card. We have not tested any of these stations. How we research | How links work
The short answer
Each card below gives runtime in hours for a fridge, a CPAP machine and an electric blanket on one power station: capacity x 0.85 / device watts. A 288 Wh Jackery Explorer 300 v2 runs the median ENERGY STAR top-freezer fridge for about 5.9 hours. Print them free for a library or lending program.
The cards
Print this page, or just the cards you need, and keep one with each station. Hours assume the station starts full, one device at a time and nothing else plugged in.
Jackery Explorer 300 v2: how long will it run?
Battery 288 Wh. AC output 300 W, surge 600 W. Do not plug in anything rated above 300 W.
| Device | Watts used | About this many hours | Source |
|---|---|---|---|
| Full-size fridge (top freezer) | 41.4 W | 5.9 | capacity, watts, 0.85 |
| CPAP (ResMed AirSense 11) | 56.1 W | 4.4 | capacity, watts, 0.85 |
| Electric blanket (Sunbeam Microplush) | 100 W | 2.4 | capacity, watts, 0.85 |
Hours = 288 Wh x 0.85 / watts. A fridge cycles on and off and draws more for a moment when the compressor starts. Real runtimes vary with settings, room temperature and battery age. Source: buyerdecision.com/tools/power-station-runtime-cards
Jackery Explorer 1000 v2: how long will it run?
Battery 1,070 Wh. AC output 1,500 W, surge 3,000 W. Do not plug in anything rated above 1,500 W.
| Device | Watts used | About this many hours | Source |
|---|---|---|---|
| Full-size fridge (top freezer) | 41.4 W | 22 | capacity, watts, 0.85 |
| CPAP (ResMed AirSense 11) | 56.1 W | 16 | capacity, watts, 0.85 |
| Electric blanket (Sunbeam Microplush) | 100 W | 9.1 | capacity, watts, 0.85 |
Hours = 1,070 Wh x 0.85 / watts. A fridge cycles on and off and draws more for a moment when the compressor starts. Real runtimes vary with settings, room temperature and battery age. Source: buyerdecision.com/tools/power-station-runtime-cards
EcoFlow RIVER 3 Plus: how long will it run?
Battery 286 Wh. AC output 600 W, surge 1,200 W. Do not plug in anything rated above 600 W.
| Device | Watts used | About this many hours | Source |
|---|---|---|---|
| Full-size fridge (top freezer) | 41.4 W | 5.9 | capacity, watts, 0.85 |
| CPAP (ResMed AirSense 11) | 56.1 W | 4.3 | capacity, watts, 0.85 |
| Electric blanket (Sunbeam Microplush) | 100 W | 2.4 | capacity, watts, 0.85 |
Hours = 286 Wh x 0.85 / watts. A fridge cycles on and off and draws more for a moment when the compressor starts. Real runtimes vary with settings, room temperature and battery age. Source: buyerdecision.com/tools/power-station-runtime-cards
Jackery Explorer 240 v2, Jackery Explorer 500 v2, EcoFlow RIVER 3 are not in our power station dataset, so they have no card yet.
For library and program staff
These cards are free to print, copy and hand out with a lent station. Please keep the source line on each card, or link to this page, so borrowers can find the assumptions and any corrections. The data is under CC BY 4.0.
Next step
Check your own device's label for its watts and use the formula above. If you rely on a medical device such as a CPAP, ask your equipment provider about backup power before an outage.
Common questions
How long will a small power station run a CPAP?
About 4.4 hours for the Jackery Explorer 300 v2 (288 Wh) at the 56.1 W typical draw ResMed states for the AirSense 11, using a 0.85 efficiency factor. Check with your equipment provider before relying on it.
Method
- Formula. Hours = capacity (Wh) x 0.85 / device watts. The 0.85 factor is the working-time factor Jackery publishes.
- Capacity and AC output. From each maker's product page, as stated, read on 2026-10-26 for our dataset.
- Full-size fridge (top freezer): 41.4 W. The average draw of the median ENERGY STAR top-freezer fridge, 363 kWh a year across 750 models / 8,760 hours.
- CPAP (ResMed AirSense 11): 56.1 W. The "Typical power consumption 56.1W" in the ResMed user guide.
- Electric blanket (Sunbeam Microplush): 100 W. The rated wattage on the Sunbeam product page; lower heat settings draw less.
- Not covered. Start-up surge, running several devices at once, cold weather, battery wear, and charging while in use. We did not run any device on these stations.
Sources
- Jackery, complete guide to portable power supply: working time = capacity x 0.85 / device watts, read 2026-10-26
- ENERGY STAR certified residential refrigerators, 750 top-freezer models, EPA data updated 2026-10-16, read 2026-10-17
- ResMed AirSense 11 user guide, technical specifications: typical power consumption, read 2026-10-27
- Sunbeam Home product page, Heated Blanket, Microplush, 12 heat settings: Wattage, read 2026-10-17
- Jackery Explorer 300 v2 product page: capacity and AC output, read 2026-10-26
- Jackery Explorer 1000 v2 product page: capacity and AC output, read 2026-10-26
- EcoFlow RIVER 3 Plus product page: capacity and AC output, read 2026-10-26
Changes
- : Published with 3 cards. Jackery Explorer 240 v2, Jackery Explorer 500 v2, EcoFlow RIVER 3 are not in our dataset yet, so they have no card.