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Two Tesla Powerwall home batteries and gateway mounted on the siding of an Illinois home
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GRID STATESTANDBY

Backup power for your home.

Keep what matters
powered.

Home batteries keep the essentials running during an outage and can store your solar power for use after sunset. We help you decide if one is worth it.

Design my backup plan
01 / PRIORITY BEFORE PRODUCT

What stays on
when the grid goes off?

Tap the household loads below. Watch how one choice changes the entire backup conversation.

OUTAGE SIMULATOR / TAP TO SELECT

Pick what stays on.

45.6HOURS*

Illustrative runtime on a 20 kWh-class battery with a planning reserve.

SELECTED LOAD395 W
*Actual runtime varies materially with cycling loads, temperature, battery settings, efficiency, age, and equipment.
Two Tesla Powerwall batteries installed side by side on a brick wall of an Illinois home
WHAT TO COMPARE

Battery size is only part of the decision.

01

Backup priorities

Identify which circuits matter, how long they should run, and what loads should remain off during an outage.

02

Capacity planning

Usable energy, output power, solar recharge potential, equipment limits, and expansion options belong in the model.

03

Honest economics

Storage cost and value are compared separately from solar so backup benefits are not disguised as guaranteed savings.

THE DAILY ENERGY CYCLE

Store daytime solar.
Use it at night.

6AMNOON6PMMIDNIGHT
01 / Generate

Solar production rises through daylight hours.

02 / Store

Available excess energy can charge a compatible battery.

03 / Shift

Stored energy can support selected evening or outage loads.

BACKUP DESIGN / 04 MOVES

Design the outage
before buying the battery.

  1. 01

    List critical loads

    Decide what must stay powered and what can wait.

  2. 02

    Model the duration

    Estimate load size, runtime expectations, and solar recharge conditions.

  3. 03

    Compare configurations

    Review capacity, output, integration, placement, and expansion tradeoffs.

  4. 04

    Complete site design

    The installation partner confirms electrical scope, permits, and final equipment layout.

Backup performance depends on system configuration, connected loads, battery state of charge, weather, and solar availability. Final design is completed by the installation partner.

Compare storage paths
Home Batteries questions

Understand the details before deciding.

Start with the common questions, then verify the equipment, home, provider, and utility details for your project.

Browse every FAQ

Only if the system is designed and sized for that goal. Many installations prioritize essential circuits because whole-home backup requires more power, capacity, and cost.