Quick answer
A standby generator powers your whole home automatically and runs for days on natural gas or propane — best for frequent or long outages. A home battery is silent, clean, and switches over instantly, ideal for shorter outages and pairing with solar, but its runtime is limited. A portable generator is the cheapest but powers only a few circuits and needs careful manual setup. Pick based on how long your outages last, your budget, and what you must keep running.
- Frequent or multi-day outages, whole-home, hands-off: standby generator.
- Short outages, quiet and clean, solar pairing, instant switchover: home battery.
- Tight budget, occasional outages, a few essentials: portable generator (used safely).
- Standby and battery systems install with a transfer switch so power restores automatically and safely.
Use this guide when
Windstorms keep knocking out your power, you work from home, you rely on medical equipment or a well pump, or you're adding solar and wondering about backup.
What actually drives the decision
Three questions: how long do your outages typically last, what do you need to keep running (just the essentials vs the whole home), and what's your budget — including installation, not just the equipment.
Compare your options
Choose a standby generator when
You want the whole home (or most of it) to come back automatically within seconds and stay on for days. It runs on natural gas or propane, needs no hand refueling, and is sized to your real load with an automatic transfer switch.
Choose a home battery when
Your outages are usually short, you value silent and emissions-free operation, you're adding or already have solar, or you want instant automatic backup for essentials. Runtime is limited by capacity, and you can add batteries for more.
Choose a portable generator when
Budget is the deciding factor and outages are rare. It's the lowest upfront cost but powers only a handful of circuits, must run outdoors well away from the home, and needs a safe connection — never a wall outlet.
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.
Backfeeding a portable into an outlet
Plugging a portable generator into a wall outlet ('backfeeding') is extremely dangerous — it can electrocute utility workers and start fires. A proper interlock or transfer switch is the only safe way to connect any generator to your home.
Expecting whole-home runtime from a small battery
A single battery may run essentials for hours, not days, and won't carry electric heat or AC for long. Match the system size to what you actually need to power, and for how long.
How we build this guidance
- Every option is sized to the loads you actually need to keep on, with a code-compliant transfer switch.
- Recommendations reflect the real Puget Sound windstorm outages Eco's electricians respond to.
- We'll tell you when a battery or a portable is plenty — not just sell the biggest generator.
Methodology: Comparison reflects equipment specs, transfer-switch requirements, and Washington electrical code — your home requires a load assessment.
Last updated: 2026-06-23
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Common questions
How long can each option power my home?
A standby generator can run for days as long as it has fuel (effectively indefinitely on natural gas). A home battery typically covers essentials for several hours and can be expanded with more batteries. A portable runs as long as you keep adding fuel, but only powers a few circuits.
Is a home battery better than a generator?
Neither is universally better — it depends on your outages. Batteries are quiet, clean, and instant but limited in runtime; standby generators carry more load for much longer but cost more and use fuel. Some homeowners combine both, especially with solar.
Can I just use a portable generator I already own?
You can, safely, with a proper interlock kit or transfer switch installed by a licensed electrician so you never backfeed your home's wiring. We can add one and show you exactly how to operate it.
Do these need a permit in Washington?
Permanent standby generators and battery systems require electrical permits and inspection — which Eco handles. We make sure the install meets code and is safe for you and for utility crews.