Portable power stations and installed home batteries both store energy, but they do very different jobs. Compare capacity, output, what each can run in a blackout, safety, indicative costs and the generator-inlet alternative. A portable power station is a plug-in battery box that you carry to the appliance; a home battery is installed at your switchboard and works with your solar every day. A typical portable unit can keep a fridge, lights, phones and the internet going through a short blackout, but it cannot run a household. An installed home battery can store daytime solar for the evening and, when it is set up for backup, power selected circuits or the whole home during an outage. Which suits you depends on what you want to run, for how long, and whether you also want everyday bill savings.
Capacity and output compared
Two numbers decide what any battery can do. Capacity, in kilowatt-hours, sets how long it lasts. Output, in watts or kilowatts, sets how much it can run at the same time. A unit with plenty of capacity but low output still cannot boil a kettle.
| Feature | Portable power station | Installed home battery |
|---|---|---|
| Typical usable capacity | Commonly around 0.5-3 kWh | Commonly around 5-15 kWh, with 10 kWh class systems popular |
| Typical continuous output | Commonly around 0.5-3 kW from its own sockets | Commonly around 3-10 kW, depending on the inverter |
| How appliances connect | Plugged into the unit or a heavy-duty lead | Through your switchboard wiring |
| How it recharges | Power point, car socket or folding panels | Your rooftop solar, and the grid if configured |
| Everyday bill savings | Negligible | Stores daytime solar for evening use |
| Federal battery discount | Not eligible | Roughly 30% off eligible batteries installed with solar |
| Installation | None | SAA-accredited installer |
What each can run in a realistic blackout
Appliance ratings vary, so check the label on your own equipment, but these typical figures show what fits. Some energy is lost converting stored power to 230 V, so a portable unit delivers a little less than its rated capacity.
| Appliance | Typical draw when running | Portable unit (about 1-2 kWh) | Home battery with backup (about 10 kWh) |
|---|---|---|---|
| Fridge-freezer | 100-200 W while the compressor runs, cycling on and off | Roughly a day, depending on the fridge and unit size | Yes, alongside other loads |
| LED lights in a few rooms | 30-60 W | Yes | Yes |
| Modem and router | 10-20 W | Yes, for many hours | Yes |
| Phone and laptop charging | 20-100 W | Yes | Yes |
| Microwave | 1,000-1,500 W | Briefly, if output allows | Yes, if on a backup circuit |
| Kettle | 2,000-2,400 W | Often above the output limit | Yes, if on a backup circuit |
| Large split or ducted air-conditioning | 2,000 W or more | No | Only with whole-home backup and enough inverter power |
| Oven, cooktop or storage hot water | Several thousand watts | No | Usually left off backup circuits |
In practice, a portable unit covers the essentials through an evening outage and perhaps into the next day if you are careful. A home battery with backup carries the essentials for longer, and if the outage happens in daylight, a system designed for it can keep recharging from your panels while the grid is down.
You can stretch any battery further with a few habits. Keep the fridge and freezer doors closed, switch off anything non-essential at the wall, use LED lamps rather than older lights, and charge phones and laptops early while the battery is full. Avoid heating appliances such as kettles, toasters and hair dryers on a portable unit, since a few minutes of use can take a large share of its capacity.
Safety differences
- Never plug a portable power station or a generator into a power point to feed your home's wiring. Back-feeding is dangerous for anyone working on the network and can cause fires or electric shock.
- Prefer LFP (lithium iron phosphate) chemistry, which is generally regarded as more thermally stable than other common lithium chemistries.
- Charge and store a portable unit on a hard surface, away from beds, exits, heat sources and direct sun, and follow the manufacturer's instructions.
- Buy units approved for sale in Australia, with the Regulatory Compliance Mark and Australian sockets.
- Use heavy-duty extension leads rated for the load, and do not chain power boards together.
- Home batteries must be installed to Australian Standards by accredited professionals, including rules on location and clearances.
The middle option: a generator inlet
If you want hardwired circuits such as lights and the fridge to run during long outages without buying a home battery, a licensed electrician can install a generator inlet and changeover switch so a portable generator can supply chosen circuits safely. The market lists a Generator Inlet & Changeover Switch from $990, indicative. It gives runtime for as long as you have fuel, but it is manual, noisy and the generator must run outdoors.
Cost and value
- Portable Power Station: from $1,490 on the market, indicative. Low cost and no installation, but it sits in a cupboard most of the year and does nothing for your bills.
- Home Battery Installation: from $8,490 for a 10 kWh class LFP battery, indicative and after the federal discount. The published Sydney range for a 10 kWh battery is $8,000-$11,000 after the federal battery discount. It works every day, storing solar for the evening.
- Blackout Protection Package: from $10,490, indicative, combining a battery, a backup-capable inverter, essential circuits and automatic changeover.
Not every home battery provides backup automatically. Some systems shut down with the grid unless they have a backup-capable inverter and the right wiring, so ask each quote to state exactly what will run in a blackout. Our comparison of hybrid and string inverters explains why the inverter matters. The federal Cheaper Home Batteries Program discount needs the battery to be installed with solar, and its value steps down every 1 January and 1 July, so confirm current figures on the Clean Energy Regulator website before signing. If you already own a battery, the NSW VPP incentive of up to $1,000 is covered in our guide to NSW incentives.
Next steps
List the few things you genuinely need during a blackout and how long outages usually last where you live. If that list is a fridge, lights and the modem for a few hours, a portable unit may be enough; if you want everyday savings as well as backup, compare installed batteries. Indicative prices for portable units, generator inlets and home batteries are on the energy market page, with installed prices confirmed after a site assessment. For a backup design matched to your switchboard and solar, request a free assessment from Blue Energy Solar.
Frequently asked questions
Can I charge a portable power station from my rooftop solar?
Yes, indirectly. Plug it into a normal power point in the middle of the day, and when your panels are producing more than the house uses, the charge effectively comes from your solar. Many units also accept small folding panels plugged straight into the unit. Never try to connect a portable unit to your rooftop array or its cabling, which carries high DC voltage and is strictly for accredited installers.
How long does a portable power station last?
LFP units are commonly rated for thousands of charge cycles, so for occasional blackout use, age and storage conditions matter more than cycles. Store the unit partly charged in a cool, dry place, top it up every few months as the manufacturer recommends, and give it a short test run before storm season so you know it works and remember how to use it.
Is a portable power station worth having if I already own a home battery?
It can still be useful for loads that are not on your backup circuits, for camping, or for running a fridge in a separate shed. If your battery has no backup function, a portable unit fills that gap cheaply. If you already have whole-home backup, it adds little at home. Check your installation documents to see exactly which circuits your battery supports during an outage.
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