← Field Notes Food Storage No. 22

Freeze dryer: worth it or not?

Honest math on the biggest purchase in food storage.

Freeze dryers are the most-hyped item in preparedness. Let's do the math honestly.

What they do: freeze the food, then pull a vacuum so ice sublimates straight to vapor — removing ~98% of moisture while preserving nutrients, flavor, texture and color. Nothing else comes close. 20–25 year shelf life on food people actually want to eat: meat, eggs, dairy, full cooked meals.

The costs nobody leads with: - Substantial upfront purchase - It's a serious electrical load running long cycles. Not something you casually add to a modest solar system. - Consumables — mylar, absorbers, eventual pump maintenance - Time and space. Batches are long, the machine is big and not quiet.

When it pays off: you're preserving a real garden harvest or bulk meat buy that would otherwise spoil, you're feeding several people, or you want variety and quality in long-term storage rather than just calories.

When it doesn't: one or two people starting out, no garden or bulk source, or a power situation that can't comfortably carry it.

More on Food Storage