Quick answer
Whole-home standby generators run on natural gas or propane and carry a house through multi-day outages; battery backup provides quiet, instant switchover for selected circuits and pairs well with solar. Puget Sound windstorms favor generators for extended outages and batteries for shorter events and solar homes.
- Generators excel at long, multi-day outages; batteries excel at short ones and solar homes.
- Standby generators need fuel (gas or propane) and periodic self-tests; batteries are silent.
- Both require a permitted transfer switch — portable backfeeding is dangerous and illegal.
- Size backup to your critical loads first: heat, fridge, sump pump, medical, internet.
After one too many windstorm outages
The Puget Sound's winter windstorms regularly drop power across the Eastside and rural areas for hours to days. Homeowners with medical equipment, a home office, a sump pump fighting our wet winters, or a freezer full of food start weighing backup power seriously after a multi-day outage. The first step isn't choosing a product — it's deciding which loads absolutely must stay on, which sizes the whole solution.
When solar or quiet operation matters
If you already have or are planning rooftop solar, battery backup integrates naturally and can recharge from the panels during a daytime outage. Batteries also appeal where noise, fuel storage, or emissions are concerns — they switch over silently and instantly. Generators win on sustained runtime, but for shorter outages or solar-equipped homes, a battery's quiet, fuel-free operation is often the better fit.
How it works
The standby generator path
A permanently installed standby generator connects to natural gas or a propane tank and starts automatically through an automatic transfer switch when it senses an outage. It runs a weekly self-test and can power either your whole home or a selected set of circuits for days, refueling concerns aside. It's the strongest option for the Puget Sound's occasional multi-day windstorm outages, where battery-only systems would run down.
The battery backup path
A home battery system stores energy and switches over instantly and silently when the grid drops, with no fuel delivery or emissions. Duration is limited by the battery's capacity unless it's paired with solar that recharges it during daylight. Batteries are ideal for partial-home backup of critical circuits and for daily solar self-consumption, but a multi-day outage without sun can exhaust them faster than a generator.
Sizing and circuit selection
Both technologies start from the same question: what must stay powered? Whole-home backup costs more and needs more capacity; critical-loads backup (heat, refrigeration, sump pump, key outlets, internet, medical devices) is often the cost-effective sweet spot. Eco maps your essential circuits, calculates the load, and sizes the generator or battery to match — so you're not over-buying capacity or coming up short during the next storm.
Key terms and context
This guide is written for electrical decisions in the Puget Sound. It uses the same terminology you'll hear from inspectors, technicians, and permit offices.
Portable generator hazards
Running a portable generator into a regular outlet — backfeeding — energizes the lines unpredictably and can kill utility workers and damage equipment, and it's illegal. Portables also produce carbon monoxide that's deadly indoors or in attached garages, and overloaded extension cords overheat. Safe whole-home backup requires permanently installed transfer equipment, not a portable unit plugged into the house.
Skipping permits and utility coordination
Transfer switches, gas connections, and battery installations require permits and, often, utility coordination with Puget Sound Energy. Skipping these steps risks an unsafe installation, a failed inspection, and problems with interconnection or warranty. A compliant install protects your home and ensures the system actually does its job when the storm hits, instead of becoming a liability.
How we build this guidance
- Comparison reflects typical Puget Sound windstorm outage durations and residential load profiles.
- All backup installs use permitted, permanent transfer equipment — never portable backfeeding.
- Eco coordinates permits and PSE requirements for transfer switches and gas connections.
Methodology: Comparison based on typical Puget Sound outage-duration patterns and residential load profiles; sizing requires an in-home critical-load assessment.
Last updated: 2026-06-08
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Common questions
Does PSE require approval for a generator or battery?
Transfer switches and gas connections require permits, and grid-interactive battery systems often require interconnection coordination with Puget Sound Energy. The exact requirements depend on the equipment and your location. Eco handles the permitting and utility coordination as part of the installation so the system is compliant and safe.
How long can a battery run my house during an outage?
It depends on the battery's capacity and how many circuits you back up. A battery sized for critical loads — heat, fridge, sump pump, internet — can last many hours to a day or more; whole-home backup drains faster. Pairing with solar extends runtime substantially during daytime, which matters less in our darker winter outages.
Which is better for Puget Sound windstorms?
For the multi-day outages our windstorms can cause, a standby generator's ability to run for days on gas or propane is hard to beat. Batteries shine for shorter outages, quiet operation, and solar homes. Many homeowners choose based on outage history and whether they have solar — Eco helps weigh both against your needs.
Can I use a portable generator instead?
Only safely with a proper transfer switch or interlock and an outdoor, well-ventilated location — never by backfeeding an outlet, which is dangerous and illegal. Portables also can't start automatically and require manual refueling. For reliable, hands-off backup, a permanently installed standby generator or battery is the safer choice.
Do I have to back up the whole house?
No, and most homeowners shouldn't. Backing up critical loads — heating, refrigeration, sump pump, medical equipment, and a few key outlets — is typically more cost-effective and easier to size than whole-home backup. Eco maps your essential circuits first and sizes the system around them.