43 vs 50 Inch TV: Electricity & Running Cost (2026)
When choosing between a 43 inch and 50 inch TV, most buyers compare price, picture quality, and room fit. But there is a fourth factor that rarely gets discussed: electricity cost. A bigger screen means a larger backlight panel, more LEDs, and higher power draw. The question is whether that difference is meaningful enough to influence your decision.
This guide compares the real-world power consumption and yearly running cost of 43 inch and 50 inch TVs. For a visual size comparison, check our 43 vs 50 inch comparison tool to see the physical difference side by side.
Power Consumption: The Numbers
Modern LED/LCD TVs are remarkably efficient, but screen size directly affects power draw. Here are typical wattage figures for 2026 models:
| Metric | 43 Inch | 50 Inch |
|---|---|---|
| Typical power draw (LED) | 60-80W | 75-100W |
| Average power draw | ~70W | ~85W |
| Power difference | Base | +15-25W |
| Energy Star certified? | Most models | Most models |
| Standby power | <0.5W | <0.5W |
The 50 inch TV draws roughly 15 to 25 watts more than the 43 inch when running. That is a 20-35% increase in power consumption, proportional to the 35% larger screen area.
Yearly Electricity Cost Calculation
Let us translate watts into dollars. Assuming the US average electricity rate of $0.16 per kWh and 5 hours of daily use (typical for a living room or bedroom TV):
| Calculation | 43 Inch | 50 Inch |
|---|---|---|
| Daily energy use | 350 Wh (0.35 kWh) | 425 Wh (0.43 kWh) |
| Yearly energy use | 128 kWh | 155 kWh |
| Yearly cost (@$0.16/kWh) | $20.48 | $24.80 |
| Difference per year | - | +$4.32 |
Over a typical 7-year TV lifespan, the 50 inch will cost approximately $30 more in electricity than the 43 inch. That is less than the price of a single movie ticket per year.
What Drives the Power Difference?
Three factors explain why bigger TVs consume more power:
- Backlight area: The 50 inch TV has 35% more screen area to illuminate. More LEDs or a larger backlight panel means more power draw.
- Brightness output: To maintain the same perceived brightness per square inch, the 50 inch must output more total lumens, which requires more energy.
- Processing overhead: Larger panels may use slightly more processing power for upscaling and motion handling.
OLED TVs tell a different story. OLED panels are self-emissive, meaning each pixel generates its own light. A 50 inch OLED uses only marginally more power than a 43 inch OLED because there is no separate backlight. However, OLED TVs cost more upfront. See our guide on mini LED vs OLED for more on display technologies.
Heavy Users: When It Adds Up
The yearly cost difference is small for typical use, but it grows if you are a heavy viewer:
- 5 hours/day (average): $4.32/year difference — negligible
- 8 hours/day (heavy): $6.91/year difference — still small
- 12 hours/day (always on): $10.37/year difference — starts to matter
- 24 hours/day (commercial): $20.74/year difference — choose the 43 inch
For commercial settings like bars, restaurants, or waiting rooms where the TV runs all day, the cumulative difference becomes meaningful. For home use, it is rarely a deciding factor.
5 Ways to Lower Your TV Energy Bill
Regardless of which size you choose, these settings can cut power consumption by 20-40%:
- Lower backlight brightness: Reducing backlight from 100% to 70% cuts power draw by approximately 20-30% with minimal perceived difference in a dim room.
- Enable eco mode: Most 2026 TVs have an automatic brightness sensor that adjusts output based on room lighting. This can save 15-25% on energy.
- Turn off when not watching: Many TVs left on use 60-100W for hours with nobody watching.
- Use the sleep timer: If you fall asleep with the TV on, set a 60 or 90 minute auto-off timer.
- Choose Energy Star models: Certified models use approximately 25% less energy than non-certified equivalents of the same size.
Does Electricity Cost Matter for Your Decision?
For 95% of buyers, the answer is no. A $4-per-year difference is unlikely to sway your choice. The factors that actually matter are:
- Room size and viewing distance — see our bedroom viewing guide
- Purchase price — typically $80-$150 difference between the two sizes
- Wall or stand space — the 50 inch needs a wider surface
- Use case — movies favor 50 inches, casual viewing is fine at 43
If you are choosing purely on running cost, the 43 inch wins by a few dollars per year. But if your room can accommodate a 50 inch and you want more immersion, the extra electricity cost is trivial. For more on the value calculation, see our cost per inch value analysis.
The Bottom Line
A 50 inch TV costs approximately $4 more per year to run than a 43 inch. Over 7 years, that is about $30 — less than the sales tax on either TV. Choose based on room fit, viewing distance, and budget, not electricity cost. Both sizes are energy-efficient by historical standards, and modern LED panels sip power compared to TVs from a decade ago.
Still deciding? Use our 43 vs 50 inch visual comparison tool to see both sizes at true scale, or read our 7-inch difference guide for the complete size breakdown.