Battery Backup or Standby Generator? Choosing Home Backup Power

Home backup power used to mean one thing: a generator. Now many homeowners are also looking at battery storage, alone or paired with solar. Both keep your lights on in an outage, but they work differently, last differently and suit different homes.

Here’s a plain comparison to help you decide which makes sense for your house in Central or Southside Virginia.

How Each One Works

A standby generator is an engine that burns natural gas or propane. An automatic transfer switch starts it within seconds of an outage and switches the house over. It runs as long as it has fuel. See home standby generators.

A battery system, such as Generac PWRcell, stores electricity and releases it the instant the grid goes down, usually with no flicker. It is recharged from the grid or from solar panels. Its runtime depends on how much energy it stores and how much you use.

Side by Side

• Runtime: a generator runs for days on natural gas or a full propane tank. A battery runs for hours to a day or more depending on its size and your load, and longer if solar is recharging it.
• Heavy loads: generators handle well pumps, heat pumps and central air more easily. Batteries can run them if the system is sized for the surge, but large loads drain them quickly.
• Noise and exhaust: batteries are silent and have no exhaust. Generators make noise when running and need clearance from windows and doors.
• Maintenance: generators need yearly engine service. Batteries need very little routine maintenance.
• Everyday use: a generator only does something during an outage. A battery paired with solar can also be used day to day.
• Fuel: a generator depends on gas service or propane deliveries. A battery depends on the grid or the sun to recharge.

Which Fits Your Home?

A standby generator usually fits best if:

• Outages in your area last a day or longer
• You have a well pump, electric heat or large air conditioning you need to run
• You want whole-home coverage for the lowest cost per hour of backup

A battery system usually fits best if:

• Most of your outages are short
• You have or plan to add solar
• You want silent backup with no fuel and little maintenance
• Your backup needs are focused on essentials

Some homes use both: a battery for short outages and instant switchover, a generator for long ones.

A Third Option: Portable Generator Hookup

If budget is the main concern, a portable generator connected through an inlet and interlock or transfer switch can keep essentials running. See portable generator hookups.

Code, Permits and Incentives

Battery storage is covered by its own article of the National Electrical Code and by the fire code, which set rules for where batteries can be installed and how they are disconnected. Both batteries and generators need permits and inspections. Federal tax credits for home energy equipment changed in 2025 and 2026, so check what applies with your tax preparer before counting on one.

Not sure which backup option fits your home? Book a visit on our booking page and we’ll walk you through both.

Frequently Asked Questions

How long will a home battery last in an outage?

It depends on the battery’s capacity and what you run. A battery sized for essentials can often get through a night; heavy loads like central air shorten that a lot. Solar recharging extends it.

Can a battery run my well pump?

Often yes, if the system is sized for the pump’s starting surge. We check the pump before recommending a battery.

Do I need solar to have a battery?

No. A battery can be charged from the grid and used only for backup, though solar lets it recharge during a long outage.

Which is cheaper, a battery or a generator?

For whole-home coverage through long outages, a generator usually costs less. For essentials and short outages, the gap narrows. We’ll price both for your home.

Why Homeowners Choose Progress and Heritage

We install standby generators, battery storage and portable generator hookups, so we can recommend the one that fits rather than the one we sell. Our electricians are licensed, insured and background-checked, and we serve Lynchburg, Roanoke, Danville, Martinsville and the surrounding counties. See our home technology and power solutions.