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Infographic

Thermoelectric vs compressor coolers: the infographic

Amp draw, overnight drain, and ice-cost math — the two 12V cooler technologies at a glance.

Research-based. We did not test these hands-on. Scores come from published specs and driver reviews.

By Marcus ReidSeptember 26, 2026 · 4 min read · Research-based
Infographic artwork comparing a thermoelectric cooler and a compressor fridge for truck drivers
At-a-glance artwork for this page — the numbers live below, and the embed code at the bottom carries the brand back to thedrivergear.com.

Numbers

Amp draw: the honest numbers

Thermoelectric vs compressor: published-spec ranges
MeasureThermoelectricCompressor fridge
Draw while running≈ 4 A continuous (48 W at 12 V) — most budget models have no thermostat and run constantly≈ 4–5 A while the compressor runs (50–60 W), cycling roughly 25–35% of the time
Average draw, 25°C cab≈ 4 A≈ 1.0–1.5 A
Overnight drain, 10 h engine-off4 A × 10 h = 40 Ah — about 40% of a 100 Ah battery1.2 A × 10 h ≈ 12 Ah — about 12% of a 100 Ah battery
Cooling ability15–20°C below the cab — a 40°C cab means 20–25°C inside. Still warm.Holds a real setpoint down to −18°C freezer territory, through heat waves
Typical price$60–$150 CAD (as of Sep 2026)$300–$500 CAD (as of Sep 2026)

Money

Ice-cost math: when a compressor fridge pays for itself

Truck-stop ice runs about $3–$4 a bag in Canada. A regular cooler eats roughly two bags a day in summer — call it $7 a day. Run five days a week and that is about $150 a month in ice.

A compressor fridge at $300–$450 pays for itself in roughly 2–3 months of that ice habit — before counting the food you stopped throwing out. The full walkthrough is on our cooler vs truck-stop ice cost comparison, and the battery math behind the overnight row above lives in the overnight battery-drain guide.

Which one

When each type wins

  • Thermoelectric wins — day cab or single shifts, drinks and packaged snacks only, mild temperatures, tight budget. Check our full thermoelectric vs compressor explainer before buying.
  • Compressor wins — multi-day trips, real food, hot weather, overnight stops with the engine off. This is the serious option our 2026 cooler picks rank.

Transparency

Our assumptions (stated, not hidden)

  • 12.6 V resting system voltage; a 12 V × 15 A dash circuit maxes out near 180 W.
  • 25°C cab, compressor set to 4°C fridge mode, 30% duty cycle; thermoelectric models without a thermostat run continuously.
  • Battery = 100 Ah deep-cycle equivalent, 50% usable for lead-acid; real trucks carry more reserve, cold starts eat margin.
  • Ice at $3.50 a bag, two bags a day, five road days a week.
  • Compressor figures reflect typical published specs for 35–45 L dual-zone models; small single-zone units can draw less.

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