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Can a power station back up your house?
Sometimes, for some circuits. Here is how a large portable power station compares with an installed home battery such as Tesla Powerwall 3, using each maker's published specs.
A portable power station is a battery, inverter and outlets in one box. Small ones run a laptop; the largest are marketed for home backup and can connect to a transfer switch or a smart panel. An installed home battery such as Tesla Powerwall 3 is mounted on a wall or floor, wired into your home's electrical system by an electrician, and usually paired with equipment that switches your home to battery when the grid fails.
The specs side by side
| Tesla Powerwall 3 | EcoFlow DELTA Pro Ultra | Jackery Explorer 5000 Plus | Jackery HomePower 3600 Plus | |
|---|---|---|---|---|
| Energy | 13.5 kWh (AC) | 6 kWh per battery; 6 to 90 kWh expandable | 5,040 Wh; expandable to 60 kWh | 3,584 Wh; expandable to 21 kWh |
| Output | Up to 11.5 kW continuous | 7.2 kW to 21.6 kW | 7,200 W rated (14,400 W surge) | 3,600 W |
| Voltage | Home system | 120/240 V | 120/240 V | See maker |
| Solar | Up to 20 kW DC | See maker | See maker | See maker |
| Home connection | Gateway 3 or Backup Switch (whole home); Backup Gateway 2 (partial) | Smart Home Panel options; auto-switchover listed | Smart Transfer Switch sold as a bundle | See maker |
| Price on maker's page, Nov 1, 2026 | Installer quote only | $4,199 (1 inverter + 1 battery) | $3,499 (pre-order) | $1,899 (pre-order) |
All specs from each maker's datasheet or product page; "See maker" means we did not find that figure stated plainly. Tesla also lists 89% solar-to-battery-to-home efficiency, a 10-year warranty and an installed weight of 291.2 lb. EcoFlow lists UL1973 and UL9540 certifications for DELTA Pro Ultra.
Where a power station works well
- Short outages and key loads. A fridge, lights, internet and phone charging use modest power. A few kWh can carry them for a while. Size it with the home backup calculator.
- Renters and movers. It goes with you. Plug-in use needs no installation.
- Double duty. The same unit can go camping or to a job site.
- Lower upfront cost. Compare the prices above with installed-battery figures in home battery cost in 2026.
Where an installed battery works better
- Whole-home backup. Tesla's datasheet lists whole-home backup with Gateway 3 or the Backup Switch, and partial-home backup with Backup Gateway 2.
- Big loads. Up to 11.5 kW continuous, and Tesla lists a 185 LRA motor-start rating, which helps with central air and well pumps.
- Daily solar use. An installed battery is designed to charge from rooftop solar every day and can join some utility programs.
- Scale. Tesla's datasheet allows up to four Powerwall 3 units plus expansion packs in one system.
The connection is the key question
Running extension cords from a power station to appliances works for a few devices. Powering household circuits is different. That needs approved equipment such as a transfer switch or smart panel, installed by a licensed electrician, so the battery can never feed power back into the grid. Both EcoFlow and Jackery sell their own home-connection products (for example the EcoFlow Smart Home Panel 3 and Jackery's Smart Transfer Switch), which also add cost.
Never plug a power station or generator into a wall outlet to feed power into the house ("backfeeding"). Use approved transfer equipment installed by an electrician.
Questions to ask yourself
- What must stay on? List the loads. If it is a fridge, lights and Wi-Fi, a power station may be enough. If it is central air and a well pump, look at installed systems or larger setups.
- How long are your outages? Multi-day outages need either lots of storage or a way to recharge, such as solar.
- Do you want it automatic? If you are often away, you may want backup that switches on its own.
- Do you own the home? Installed batteries make more sense for owners staying put.
More reading: whole-home vs critical loads, power station vs built-in system (for vans) and home backup basics. Current prices are on home battery deals.
Specs and prices from makers' pages, checked Nov 1, 2026. Not an endorsement. Have a licensed electrician design any connection to household wiring.