Backup power buying guides

Plain-English guides to sizing batteries, backing up your internet, and buying once — each one linked to a free calculator so you can check the math yourself.

Try the Gear Finder Compare setups

Beginner basics

Start here if watt-hours, inverters, and capacity classes are new — these guides build the foundation the rest of the site uses.

How to Choose a Portable Power Station Without Overspending

Size a portable power station from your real loads, learn which specs actually matter, and use a price-per-watt-hour check to avoid overspending.

Power Station vs UPS vs Power Bank: Which One Do You Need?

Power stations, UPS units, and power banks solve different problems. Learn what each does well, compare real runtimes, and pick the right one for your needs.

Watt-Hours vs Watts: The 5-Minute Explanation That Saves You Money

Watts measure how fast power flows; watt-hours measure how much a battery holds. Learn both in five minutes and stop paying for capacity you cannot use.

Why Battery Runtime Estimates Are Often Wrong (and How to Estimate Better)

Real-world battery runtime is usually shorter than the box suggests. See where the losses come from and how to make estimates you can actually rely on.

Calculators & sizing

Worked math for specific loads: how big a battery you actually need, and how to sanity-check the number before spending.

Laptop Battery Backup for a Full Workday: What It Really Takes

How much battery a full laptop workday really needs: realistic wattage ranges, 8-hour sizing math, power banks vs power stations, and charging strategy.

What Size Battery Do You Need for a Wi-Fi Router?

How to size a battery for your Wi-Fi router and modem: real wattage ranges, worked math for 4, 12, and 24-hour targets, and when a small UPS is enough.

Backup internet

Keeping your connection alive is the cheapest backup power win — routers, modems, hotspots, and satellite internet terminals.

Backup Internet Power Planning: A Complete Walkthrough

A step-by-step plan for backup internet power: inventory your gear, budget watts for primary and fallback paths, and build tiered 2-hour to multi-day plans.

Backup Power for Satellite Internet Terminals

How to size backup power for a satellite internet terminal: realistic wattage, evening vs all-day sizing math, DC-direct options, and pairing with solar.

Keeping Your Router and Modem Alive During a Power Outage

What it takes to keep your router and modem online in an outage: whether your internet survives, UPS switchover, sizing, placement, and how to test it.

Home outage setups

Apartment- and house-scale outage planning: what to power, what to skip, and how to stage the kit so it works when needed.

Small Fridge Backup Power: The Basics Before You Buy

What to know before buying a battery for a fridge: duty cycle, surge watts, honest runtime math for mini and full-size fridges, and when to skip it.

The Apartment Emergency Power Checklist

A practical emergency power checklist for apartments: battery-only options, what to power in a 12–48 hour outage, and habits that keep you ready.

Travel & remote work

Power planning that leaves the house: full remote workdays, camping trips, and gear that flies in carry-on.

Camping Power Setup for Beginners

A beginner's camping power plan: a weekend watt-hour budget, why smaller usually wins, solar realism at camp, 12V-first habits, and safe charging.

Portable Power for Remote Work: Working From Anywhere Without an Outlet

Plan a realistic remote-work power budget: laptop, phone, and hotspot watt-hours, power bank vs small power station, and recharging between sessions.

Solar charging

What solar panels realistically recharge, and how to match a panel to a battery without lab-condition wishful thinking.

Solar Panel Sizing for Portable Power Stations

How to size a solar panel for a portable power station: peak sun hours, real-world losses, input limits, and recharge times by panel wattage.

Budget setups

Real outage coverage on a small budget — where inexpensive gear genuinely works and where cutting corners costs you twice.

Budget Backup Power: A Sensible Setup When Money Is Tight

A sensible order for building backup power when money is tight: phones first, then internet, then comfort — plus the red flags to avoid on cheap gear.