Published specs do not cover this plan
EcoFlow RIVER 3 Portable Power Station
- Capacity
- 245Wh · BELOW PLAN
- Continuous AC
- 300W · COVERS
- Published surge
- Not explicit · VERIFY
Catalog checked 2026-07-09; verify the exact current model and region.
Portable Power Station Calculator
Size one repeatable mission from running watts, same-device quantity, desired hours, losses, reserve, and optional startup demand. The result separates battery capacity from continuous and startup output, then checks only the product specifications our catalog actually has.
Size one device mission
Results update as you type. Presets are starting points; verify your device label or measurement.
Planning target 627 Wh. Startup was not supplied and must be verified.
PF-02Power station sizingResult card
RSV · Reserve gaugeScale · % of planning target
Reserve gauge: 10 percent reserve. Planning capacity target 627 Wh.
627 Wh
BUFFER SETPlanning capacity target for one device at 60W each for 8 hours.
Aggregate running draw60 W
Mission energy at the devices480 Wh
Minimum capacity after losses565 Wh
Planning output requirement60 W
Capacity class500–1,000Wh
No startup figure supplied, so the output requirement currently equals aggregate running draw.
A calculated output requirement does not prove a motor or compressor will start. Verify the device and station with current manufacturer specifications; test safely when the load matters.
mid-size stations with more runtime and output headroom. Compare capacity classes.
ASSUMPTIONSPATH ACEFFICIENCY 85%RESERVE 10%STARTUP NOT SUPPLIEDFORMULA W × qty × h ÷ eff ÷ (1−rsv)
Estimate only — verify specificationsForm PF-02B
PF-SPEC · Current catalog snapshot
Check capacity, continuous output, and surge separately
These are specification checks, not hands-on tests or promises that a motor will start. “Verify” means the catalog does not contain the required explicit figure. AC output figures are only compared for the AC preset; direct-DC and custom paths need matching port or path specifications. When startup watts are not supplied, every startup check remains “Verify”; blank never means startup is not required.
Some links on this page may be paid links. If you buy through them, Cynosure LLC may earn a commission at no extra cost to you. We do not claim to have personally tested products unless clearly stated.
Published specs do not cover this plan
Jackery Explorer 300 Plus Portable Power Station
- Capacity
- 288Wh · BELOW PLAN
- Continuous AC
- 300W · COVERS
- Published surge
- 600W · VERIFY
Catalog checked 2026-07-08; verify the exact current model and region.
A required published spec needs verification
Jackery Explorer 600 Plus Portable Power Station
- Capacity
- 632Wh · COVERS
- Continuous AC
- 800W · COVERS
- Published surge
- 1,600W · VERIFY
Catalog checked 2026-07-08; verify the exact current model and region.
A required published spec needs verification
EcoFlow DELTA 2 Portable Power Station
- Capacity
- 1,024Wh · COVERS
- Continuous AC
- 1,800W · COVERS
- Published surge
- 2,700W · VERIFY
Catalog checked 2026-07-09; verify the exact current model and region.
A required published spec needs verification
Anker SOLIX C1000 Portable Power Station
- Capacity
- 1,056Wh · COVERS
- Continuous AC
- 1,800W · COVERS
- Published surge
- 2,400W · VERIFY
Catalog checked 2026-07-08; verify the exact current model and region.
A required published spec needs verification
Jackery Explorer 2000 v2 Portable Power Station
- Capacity
- 2,042Wh · COVERS
- Continuous AC
- 2,200W · COVERS
- Published surge
- 4,400W · VERIFY
Catalog checked 2026-07-08; verify the exact current model and region.
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Power station sizing formula
The tool calculates energy and output as separate shopping requirements:
aggregateRunningW = runningW × sameDeviceQuantityminimumWh = aggregateRunningW × hours ÷ efficiencyplanningWh = minimumWh ÷ (1 − reserve)startupPlanW = oneDeviceStartupW + otherDevicesRunningWCapacity answers “for how long?” Continuous output answers “can the station carry the running load?” Optional startup output asks whether one identical device can start while the others are already running. That last number is a screening requirement, not a guarantee.
Default assumptions
- 85% AC efficiency — a conservative general planning preset for an inverter path.
- 10% reserve — extra battery capacity for uncertainty rather than promised runtime.
- One device type — quantity repeats the same running and startup inputs.
- No startup figure by default — motor and compressor loads remain a separate verification task.
For mixed devices and duty cycles, use the Load Builder. Read the shared method on How we estimate.
What to do with this number
Some links on this page may be paid links. If you buy through them, Cynosure LLC may earn a commission at no extra cost to you. We do not claim to have personally tested products unless clearly stated.
Backup power stations by capacity class
Use the result above for capacity and output screening, then compare the full catalog on output, weight, and price. For a dated manufacturer-source snapshot, see theAugust published-spec value benchmark.
Some links on this page may be paid links. If you buy through them, Cynosure LLC may earn a commission at no extra cost to you. We do not claim to have personally tested products unless clearly stated.
| Product | Capacity | Output | Ports | Weight | Est. price | Ideal for | Link |
|---|---|---|---|---|---|---|---|
| EcoFlow RIVER 3 Portable Power StationEcoFlow | 245Wh | 300W AC | 3× AC outlet (300W, 600W X-Boost), USB-C, USB-A, Car port | 8.4 lb | $149–$219 | Keeping a router, modem, phones and small electronics running for hours, A light, grab-and-go outage or travel unit, Fast recharge with sub-20ms UPS passthrough | See current price |
| Jackery Explorer 300 Plus Portable Power StationJackery | 288Wh | 300W AC | AC ×1 (300W, 600W surge), USB-C ×2 (100W max), USB-A ×1, 12V car port | 8.27 lb | $200–$300 | Router and modem backup for a workday, Charging phones and tablets for days, A laptop for a few hours via the 100W USB-C port, Car trips and short outages | See current price |
| Jackery Explorer 600 Plus Portable Power StationJackery | 632Wh | 800W AC | AC ×2 (800W total, 1600W surge), USB-C 100W, USB-C 30W, USB-A 18W, 12V car port | 16.1 lb | $300–$500 | A full laptop workday plus phone charging, A day or more of router and modem backup, Weekend camping electronics, Fans, lights, and a CPAP-class device together | See current price |
| EcoFlow DELTA 2 Portable Power StationEcoFlow | 1,024Wh | 1,800W AC | 4× AC outlet (1800W, 2700W surge), 2× USB-C (100W), 2× USB-A, Car port | 27 lb | $499–$999 | Carrying a fridge plus electronics through a multi-hour outage, Home backup you can expand later (to 2048Wh+ with add-on batteries), Fast recharge — roughly 0–80% in under an hour | See current price |
| Anker SOLIX C1000 Portable Power StationAnker | 1,056Wh | 1,800W AC | AC ×6 (1800W total, 2400W surge), USB-C 100W, USB-C 30W, USB-A ×2 (12W), 12V car port (120W) | 28.4 lb | $400–$650 | Multi-day phone and internet backup, A full-size or mini fridge in duty cycles (1800W continuous, 2400W surge), Family camping trips with several devices at once, Fast top-ups between outages — 80% in 43 minutes from the wall | See current price |
| Jackery Explorer 2000 v2 Portable Power StationJackery | 2,042Wh | 2,200W AC | AC ×3 (2200W total, 4400W surge), USB-C 100W, USB-C 30W, USB-A 18W, 12V car port (120W) | 39.5 lb | $700–$1,100 | Days of essentials during long outages, A full-size refrigerator in duty cycles, High-draw devices up to 2,200W, Sub-20ms switchover keeps a router or NAS online when the grid drops | See current price |
Prices last checked between 2026-07-08 and 2026-07-09; review overdue — verify current listings
We have not hands-on tested these units. Verify current capacity, continuous output, explicit surge output, and model identity on the manufacturer specification and listing. Commissioned links, at no extra cost to you.
Frequently asked questions
How many watt-hours should my power station have?
Multiply the aggregate running watts by the desired hours, divide by the selected conversion efficiency, then add the planning reserve. This calculator performs each step and keeps the assumptions visible.
Why are capacity and output separate requirements?
Watt-hours determine how much energy is stored; watts determine how much power the station can deliver at once. A large battery can still have an inverter too small for the load, while a high-output unit can have too little capacity for the requested hours.
How is startup demand calculated for several identical devices?
When startup watts are supplied, the planning output requirement assumes one device starts while the other identical devices are already running. It does not assume every device starts simultaneously, and it does not guarantee a motor or compressor will start.
What if a product listing does not publish a surge rating?
The catalog check says Verify. It never turns a missing surge figure, an X-Boost claim, or other marketing mode into a passed surge check. Confirm the current manufacturer specification for the exact model.
Which efficiency option should I use?
Use the 85% AC preset when the device plugs into an inverter-powered outlet. Use the 93% direct DC preset for a compatible regulated DC output. Choose custom only when you have a documented value for the exact path.
Can I use this for several different devices?
Use this page for one device type and a bounded same-device quantity. For different devices, duty cycles, and a combined outage mission, use the Multi-Device Load Builder so each load remains explicit.
Calculations are estimates only. Real runtime depends on battery age, inverter efficiency, device behavior, temperature, surge loads, manufacturer limits, and actual measured wattage. Always verify product specifications before buying or relying on a setup.
Affiliate disclosure
Some links on this page may be paid links. If you buy through them, Cynosure LLC may earn a commission at no extra cost to you. We do not claim to have personally tested products unless clearly stated.