Emergency & Off-Grid Power: Generators, Solar & Batteries
When the grid goes down, power is what keeps your food cold, your phone alive, and your home livable. This guide breaks down the three layers of backup power — generators, solar, and batteries — and how to choose each one.
Key takeaways
- Multi-fuel generators beat gas-only — fuel flexibility is everything in a crisis.
- Solar generators / power stations are silent, indoor-safe, and refuel from the sun.
- Keep solar power banks to keep phones and small electronics alive.
- Stockpile lithium batteries (10-year shelf life) and rotate them FIFO.
Generators: go multi-fuel
For whole-home backup, a generator is the heavy lifter — but the fuel it burns matters more than the brand. A multi-fuel generator that runs on more than one source is the smart prepper choice. Common pairings are gasoline/propane/natural gas, or propane/natural gas; diesel with a biofuel option is excellent but costs more upfront.
Why not gasoline-only?
In any serious event, gasoline disappears first as everyone rushes the pumps to fill cars. Plan to run your generator on propane or natural gas and save gasoline for transportation. Propane also stores for years without stabilizer.
Solar generators & power stations
A solar generator — really a large battery (power station) paired with solar panels — is the most apartment-friendly and indoor-safe option. It's silent, produces no fumes, and recharges from the sun, so it never runs out of fuel. Jackery and EcoFlow are the category leaders, with units from small carry-along models up to whole-home systems.
See the best solar generators compared →
How to size your power
Two numbers decide what a power station can do:
- Output (watts): how much it can run at once — and the surge to start motors (fridges, pumps).
- Capacity (watt-hours): how long it lasts before recharging.
List your must-run devices, add their watts for output and their daily watt-hours for capacity. A 1,000–2,000Wh unit comfortably covers phones, lights, a router, and a fridge in cycles; true whole-home backup needs a much larger system plus solar to recharge.
Power banks & small electronics
Don't overlook the small stuff. A couple of solar power banks will keep phones, flashlights, and radios charged during a grid-down stretch — cheap insurance that fits in a drawer or a bag.
Battery storage
So many tools — flashlights, radios, headlamps, sensors — run on disposable batteries. Stock the common sizes (AA, AAA, and whatever your gear uses) in bulk and rotate them first-in, first-out. Favor lithium batteries, which hold a charge for around 10 years versus a few years for alkaline, and resist leaking. Remember "two is one, and one is none" — keep spares for anything you'd hate to lose.