Cybertruck Powershare Home Backup: Requirements, Cost, Runtime
What Powershare needs (Gateway, Universal Wall Connector, a certified installer), what 11.5 kW runs, and how many days a Cybertruck keeps a house going.
Updated October 27, 2026 · By the OutageWatt team · How we calculate
In short
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What you need
- Powershare Gateway (or a compatible Tesla backup device) to isolate your home from the grid.
- Universal Wall Connector, which handles the bidirectional flow.
- A Tesla Certified Installer. Installer FAQs also report a main panel under 225 A and a single-family home as typical conditions.
Tesla's support pages returned errors to our research tools, so requirements and costs here come from installer and press sources, flagged as reported. Check tesla.com before you order.
Runtime by home
| Load | Keep 20% to drive | Keep 50% |
|---|---|---|
| Average US home, everything on (28.4 kWh/day) | 3.1 days | 47 h |
| Tesla's own example (30 kWh/day) | 3.0 days | 44 h |
| Winter: furnace blower + essentials | 7.2 days | 4.5 days |
| Fridge, Wi-Fi, lights, phones | 30 days+ | 30 days+ |
About 123 kWh battery (reported), 90% efficiency, no solar. Output limited to 11.5 kW.
With a Powerwall 3
Since September 10, 2026, Powershare is reported to work alongside a Powerwall 3: the battery takes the first hours and instant switch-over, the truck tops it up through a long outage. It also means you can drive away and still have the Powerwall at home. Compare home batteries on our comparison page.
Other EVs
Powershare home backup is Cybertruck-only. For an F-150 Lightning, Kia EV9 or GM EV, see using your EV as home backup.
OutageWatt is not affiliated with Tesla. Tesla, Cybertruck, Powerwall and Powershare are trademarks of Tesla, Inc.
Frequently asked questions
What do I need for Cybertruck Powershare home backup?
Tesla's Powershare Gateway (or a compatible Tesla backup device), a Universal Wall Connector, and installation by a Tesla Certified Installer. Third-party installers report requirements such as a single-family home and a main panel under 225 A; Tesla's site is the final word.
How much does Powershare cost?
The Home Backup bundle hardware has been reported around $1,970–1,990, and about $4,000 installed in typical cases; quotes vary widely with your panel and distance from the garage. These are reported figures, not Tesla prices.
How long can a Cybertruck power my house?
Tesla says up to 3 days for a home using 30 kWh a day. Our estimate with a 20% driving reserve is about 3.0 days at 30 kWh/day, and much longer if you only back up essentials.
Free tool
Run your circuits on a Cybertruck
Switch on what you need, then open the Your EV tab.
OutageWatt is independent and not affiliated with any brand named here. Specs come from makers' spec sheets and are dated; anything wired into your home needs a licensed electrician and a transfer switch or interlock. Never backfeed through an outlet.