Compare whole-home batteries and portable power stations on cost scale, installation, capacity, portability, renters vs owners and outage length.
- Home batteries are installed, large and high-power; portable stations are plug-in, smaller and movable.
- Renters are generally better served by portable units, while owners with solar may benefit from a home battery.
- Match the choice to your outage length and your must-run loads, and consider using both.
Both a whole-home battery and a portable power station store electricity for use when the grid is down. They are very different tools, built for different homes and different outages. This guide compares them fairly so you can decide which one, or which combination, fits.
What each one is
A whole-home battery is a large battery system installed by a professional, wired into your electrical panel. Many pair with solar panels and switch over automatically when the grid fails. Some power the whole house, others only selected circuits.
A portable power station is a self-contained battery with built-in outlets that you carry and plug devices into. It usually needs no installation. Some can connect to a home through an electrician-installed inlet or transfer switch, but most are used as plug-in backup.
Capacity and power
Whole-home batteries hold many times more energy than a typical portable unit and can deliver high power to run larger loads such as a furnace blower, well pump or some air conditioning. Portable power stations come in a range from phone-and-light sizes to mid-sized units that can run a fridge for a day or more. They are good for essentials, but they are not designed to run a whole house. Use what size power station do I need to count your essential watts.
Cost scale
Without quoting prices, the difference is large. A whole-home battery is a major home improvement, typically costing many times what a portable power station does once equipment and installation are included. A portable power station is a consumer purchase. Incentives or rebates for home batteries may exist in your province, state or utility area, so check current programs rather than relying on rumours. For portable models, see our power stations hub.
Installation and permits
- Whole-home battery: Requires a licensed installer and an electrician, permits and inspection, and often utility approval. Planning and install can take weeks or months.
- Portable power station: Out of the box in minutes. No permits for plug-in use. If you want to connect it to home wiring, hire a licensed electrician. Never backfeed through a wall outlet. See transfer switch vs extension cords.
Portability
A portable unit goes where you do: another room, the car, a camping trip, a relative's house, or an evacuation. A whole-home battery is fixed to the wall and stays with the property. If you may need to leave, or if you want one tool for outages and recreation, portable has the edge.
Renters and owners
Renters generally cannot install a whole-home battery, and condo owners may need board approval. A portable power station is a natural fit for renters, since it moves with you and needs no changes to the building. Homeowners with a long-term plan, solar panels or frequent outages may find a home battery worthwhile. Many owners use both: a home battery for the essentials and a portable unit for the garage, the car or a spare room.
Outage length
Think about how long outages last in your area. For short outages of a few hours, either option works. For multi-day events, a whole-home battery paired with solar can recharge during the day, which can stretch its usefulness. A portable station can do the same with a few panels, but at smaller scale. For very long outages, you may need a second energy source such as a generator, used safely outdoors. See solar generator vs gas generator and how to use a portable generator safely.
How to decide
- List your must-run devices and their watts, and note whether any are hardwired.
- Estimate your typical and worst-case outage lengths.
- Decide whether you own the property and plan to stay.
- Ask for quotes from licensed installers for a home battery and compare with a portable setup.
- Think about what happens if the power is out and the sun is not shining. Do you have a second source?
For the broader plan, see how to prepare for a power outage and the outage planner.
Quick answers
Can a portable power station back up a whole house?
Generally no. Most are meant for essentials like phones, lights, a fridge or a CPAP. Whole-home loads need a purpose-built home system.
Can I use a portable power station and a home battery together?
Yes. Many households use a home battery for core circuits and a portable unit for flexibility, for example in a garage or on the road.