Why Solar Panels Don’t Work During an Outage

Most grid-tied solar systems are designed to shut off automatically when the power goes out.

This is a safety feature called anti-islanding. It prevents your system from sending electricity back into the grid while utility workers are repairing lines.

So even if:

• your panels are getting full sunlight
• your system is working normally
• your home could generate power

…it will still shut down until grid power is restored.

What Homeowners Usually Notice

When an outage happens, homeowners may see:

• the solar system stops producing power
• the inverter shuts off
• the monitoring app shows no production
• the home switches fully to grid loss (no power)

This can be confusing, especially if it’s a sunny day and everything looks normal on the roof.

How to Keep Power During an Outage

To keep your home running during an outage, you need a battery backup system, such as a Powerwall.

With a battery system:

• your home disconnects from the grid
• stored energy powers essential circuits
• solar panels can continue charging the battery during daylight

This allows your home to operate independently while the grid is down.

What Solar + Battery Can Power

When paired with a battery, solar can keep important parts of your home running, such as:

• refrigerator and freezer
• lights
• Wi-Fi and internet
• phone and device charging
• garage door
• essential outlets

Depending on system size, some homeowners also include partial air conditioning or additional circuits.

How Long Backup Power Lasts

Battery runtime depends on:

• how much energy is stored
• how many appliances are running
• whether solar is recharging the system

Many homes get 10–14 hours of backup for essential loads from a single battery, with longer coverage possible when solar production continues during the day.

Common Misconceptions About Solar and Outages

“Solar automatically powers my home during outages”

Not unless a battery system is installed.

“The sun is out, so I should have power”

Without backup, the system is designed to shut down for safety.

“I don’t need a battery because I already have solar”

Solar produces energy — but without storage, it can’t supply your home during outages.

When Homeowners Consider Adding Backup Power

Many Texas homeowners start thinking about backup after:

• experiencing repeated outages
• dealing with storm-related power loss
• noticing grid instability during summer
• wanting more control over their energy

Adding a battery to an existing solar system is often possible and doesn’t require replacing your panels.

Why Proper Installation Matters

For solar + battery systems to work during outages, everything must be installed correctly.

This includes:

• proper system configuration
• load planning for essential circuits
• safe, code-compliant wiring
• system commissioning and testing

A properly installed system transitions smoothly and keeps your home powered when it matters most.