Cold Store Forklifts: What Changes Below −20 °C

Why standard electric trucks fail in cold stores, and what to specify instead — battery chemistry, IP ratings, hydraulic oil, sealing and operator protection.

Last updated: 11 October 2026

A cold store is the harshest environment a warehouse truck will ever see. Everything that works at +20 °C behaves differently at −25 °C, and standard equipment fails in predictable ways.

What actually goes wrong

• **Battery capacity collapses.** A lead-acid battery loses roughly half its usable capacity at −20 °C and most of it below −30 °C. A truck rated for a full shift at room temperature manages two hours in a freezer.
• **Hydraulic oil thickens.** Lifting becomes jerky, the pump labours, and seals wear faster. Standard ISO 32 oil is not suitable below about −10 °C.
• **Condensation forms inside electronics.** Every time the truck crosses between the freezer and an unheated dock, moisture condenses on cold circuit boards. This is the most common electrical failure in cold stores.
• **Steel and paint corrode.** The freeze-thaw cycle with condensation is aggressive. Standard paint systems fail within a year or two.
• **Operators suffer.** Without a heated cab or heated handgrips, productivity drops and error rates rise.

What to specify instead

Lithium is usually the deciding factor

For a cold store, lithium is not a nice-to-have. A heated LiFePO4 pack delivers close to its rated capacity at −25 °C and opportunity-charges in a warm break room. Running lead-acid means either a spare battery set per truck — swapped in the cold — or accepting a two-hour duty cycle.

The freezer-to-dock problem

If your trucks move between a freezer and an unheated loading dock, the condensation cycle is unavoidable. The practical answer is a fully sealed, IP67 three-electric system and a heated battery compartment — not a bigger battery.

Frequently asked questions