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How We Research and Rank Backup Power Gear

What we do not do

We do not run our own lab tests on every power station or generator we write about, and we will never say we did. Our rankings come from research and calculation. When a guide includes our own hands-on measurements, that guide will say so clearly and show the numbers.

Where our information comes from

  • Manufacturer specifications, manuals, and warranty terms
  • Official sources: U.S. Energy Information Administration (electricity prices and outage data), National Renewable Energy Laboratory (solar resource data), U.S. Department of Energy and ENERGY STAR (appliance power use), U.S. Consumer Product Safety Commission (recalls and carbon monoxide safety), Ready.gov, and UL Solutions
  • Measurable design facts: battery capacity (Wh), continuous and surge output (W), battery chemistry and rated cycles, solar input limits, recharge times, UPS or EPS switchover, expandability, weight, and operating temperature range
  • Patterns in owner experiences from public sources, which we summarize and analyze rather than copy

How we calculate

  • Runtime: battery capacity (Wh) multiplied by an efficiency factor, divided by the device’s power draw (W). We use 85% as a default for AC loads and say so in every table. Real results vary with load size, temperature, and battery age, so we treat these figures as estimates, not measurements.
  • Surge check: devices with motors or compressors, such as refrigerators, well pumps, and window air conditioners, can draw two to three times their running power for a moment when they start. We compare that with each unit’s rated surge output.
  • Solar recharge: panel wattage multiplied by a real-world output factor and by peak sun hours for your region (NREL data).
  • Lifetime cost: price divided by the energy a battery can deliver over its rated cycle life.

How we rank

Each guide ranks products against criteria that fit that job. Typical criteria include whether it runs the target devices for a useful length of time, surge headroom, recharge options and speed, battery chemistry and lifespan, safety listings and recall history, weight and portability, warranty and support, and fit for the reader, including who should skip it.

Safety first

Never run a gas generator indoors, in a garage, or near windows, and install carbon monoxide alarms. Connecting any generator or battery to your home’s wiring requires a transfer switch or interlock installed by a licensed electrician. Our guides point to official safety guidance instead of offering electrical or medical advice.

Our use of AI

We use AI tools to help gather and organize published information. Every guide is reviewed and edited by the OutagePicks Team, which makes the final ranking decisions and checks facts against the original sources listed in each guide.

Editorial independence

Brands do not review or approve our guides before they are published. We do not accept payment for placement.

Keeping guides current

New models and second generations come out often. We review our guides regularly, replace products that are no longer sold, and note meaningful updates at the top of each page.

Found an error?

Email [email protected]. We correct confirmed errors and note the change on the page.