Choose what stays on.
List the circuits that matter most during an outage. Whole-home and selected-load designs have different equipment and capacity needs.
Keep a little
power in reserve.
When the grid goes quiet, a thoughtfully designed battery system can support the parts of home that matter most. Start with what you want to keep running.
Start with what matters.Lights. Food. Connection. Home.
BACKUP BEGINS WITH A BETTER PLANBuild your example
MAKE IT TANGIBLEWhat would you
What would you
keep running?
A refrigerator and a few lights use energy differently from a whole home. Build an example and explore that trade-off.
YOUR BACKUP EXAMPLEILLUSTRATIVE ONLY
What would you keep on when the power goes out?
Pick what matters to you. We keep 20% of each battery in reserve and plan for a full day without the grid.
Everyday essentials such as the refrigerator, Wi-Fi, a few lights and devices usually fit on one home battery. Adding a sump pump or heating and cooling usually means two or more.
Enable JavaScript to choose your own loads.
THE POWER OF PRIORITIES
YOUR HOME, IN THIS EXAMPLE Powered
Your selected zones stay powered.
WHAT WE WOULD START WITH
1battery
Enough for the essentials you picked, with 20% kept in reserve.
Plan my battery backupA starting point, not a quote. We confirm the size with your home’s equipment and how you use power.
THE RIGHT KIND OF READYPlan for your life.
Plan for your life.
Then size the system.
How much energy a battery stores is one part of the answer. What it can power at once matters, too.
kWhEnergy stored
How long it may last
How long it may last
kWPower delivered
What can run together
What can run together
Understand your solar.
Grid-connected solar alone generally stops supplying the home during an outage. Backup requires a system designed to safely operate without the grid, with compatible equipment and controls.
Make room for priorities.
A compatible smart panel can help manage selected circuits as your priorities change. Solar recharge depends on the system design, available sunlight and your household demand.
Explore SPAN smart panels ↗
A BACKUP PLAN, BUILT AROUND YOU Clarity before
Clarity before
capacity.
Your home, equipment and expectations shape the design. We work through those details before recommending a system.
-
01 / PRIORITIZE
Define your essentials.
Talk through outage goals, major appliances, existing solar and the loads you want to support.
-
02 / ASSESS
Check the whole system.
Review electrical capacity, equipment compatibility, installation location and the required approvals.
-
03 / DESIGN & EXPLAIN
Know what to expect.
Review the proposed capacity, backup circuits, operating limits and installation scope together.
GOOD QUESTIONSThe details
The details
behind the reserve.
Useful answers start with the way your home actually works.
Explore all FAQs ↗How long will a battery power my home?
It depends on usable stored energy, starting charge, selected loads, reserve settings and equipment limits. A small essential-load plan can behave very differently from a whole-home design. Our calculator explains the relationship; an assessment applies it to your equipment.
Can I add a battery to existing solar?
Often a battery can be considered for an existing installation, but the inverter, electrical layout and backup controls determine the available designs. We review your current system before proposing equipment.
Will my solar panels work when the grid is down?
Solar panels alone do not establish an outage-ready system. Supplying the home during an outage requires compatible equipment designed to separate from the grid and operate safely. Available sunlight and energy demand still affect what can run.
Can a battery power heating, cooling or a sump pump?
Those loads need a closer look. Running power, starting surge, duty cycle and the battery system’s output limits all matter. We assess the specific equipment instead of assuming that stored energy alone is enough.
Does every battery system provide outage backup?
No. Some installations are designed for energy management without supporting the home in an outage. Tell us that backup is a priority so the proposed design, isolation equipment and supported circuits reflect it.
Background: U.S. Department of Energy: solar + storage (opens in a new tab) and solar resilience (opens in a new tab).
YOUR HOME. YOUR NEXT MOVE.Start with your essentials.
Start with your essentials.
Build from there.
A useful backup plan starts with a conversation about your home. Tell us what you want to keep running.
Plan my battery backup