With so many portable power stations on the market — from small 300Wh units to 4000Wh-plus home backup systems — picking the right one comes down to understanding two numbers and being honest about how you'll actually use it. Here's a straightforward, Australia-specific breakdown for 2026.
The two numbers that actually matter
Capacity (Wh) is how much energy the unit stores — think of it as the size of the fuel tank. Output (W) is how much power it can deliver at once — think of it as the size of the tap. A power station with huge capacity but low output won't run power-hungry appliances; one with high output but small capacity will run almost anything, just not for very long.
Matching capacity to your use case
- Under 1000Wh — everyday backup and light camping. Covers phones, laptops, lighting, and a router for several hours to a day. Good entry point if you're not sure how much you'll use it. See the EcoFlow River 3 Max or BLUETTI AC50P.
- 1000–3000Wh — home blackout backup and serious camping. Runs a fridge, CPAP, lighting and electronics through an overnight outage or a multi-day camping trip. See the BLUETTI AC200PL or EcoFlow DELTA 3 Plus.
- Over 3000Wh — whole-home essentials backup and off-grid living. Built for multi-day blackouts or full-time off-grid van and caravan life, especially when paired with solar. See the EcoFlow DELTA Pro 3 or DELTA 3 Ultra Plus.
Don't forget output (W)
If you plan to run anything with a motor or heating element — a kettle, induction cooktop, hair dryer, or power tools — check the continuous output rating, not just capacity. A 2000Wh power station with only 1000W output won't run a 1800W induction cooktop, even though the capacity sounds generous.
Should you buy an expansion battery instead of a bigger unit?
If you're between two capacity tiers, an expansion battery is often the better buy: you get a smaller, more portable base unit day-to-day, with the option to double or triple capacity for specific trips or extended outages by adding a battery pack, rather than being locked into carrying a larger unit everywhere. Most of our BLUETTI and EcoFlow power stations show their compatible expansion battery directly on the product page.
Solar: worth adding from day one?
If you'll ever be off-grid for more than a day at a time — camping, travelling, or during an extended blackout — yes. A foldable solar panel turns a power station from "backup for a few hours" into "indefinite power," provided you get some sun. Browse our solar panel range to match one to your power station's input rating.
Frequently asked questions
What size portable power station do I need for a 3-day blackout?
Realistically, plan for a unit of 2000Wh or more, ideally paired with a solar panel to recharge during daylight — running a fridge and essentials continuously for three days without any recharging needs a genuinely large (4000Wh+) unit.
Is a bigger Wh rating always better?
Not necessarily — bigger units cost more and weigh more. Buy for your actual use case (occasional backup vs. full off-grid living) rather than the largest number available.
Can I add capacity later instead of buying a bigger unit upfront?
With most of our expandable power stations, yes — an expansion battery lets you scale up capacity later rather than committing to your maximum possible need on day one.
Still not sure which unit fits your situation? Browse our full portable power station range or explore by brand: BLUETTI and EcoFlow.