How long will a 200Ah battery run a TV?

To determine how long a 200Ah battery will run a TV, we need to consider several factors, including the battery’s voltage, the power consumption of the TV, and the efficiency of any inverters used in the system.

Calculating Runtime

The formula to estimate how long a battery will last is:

Example Calculation

1. Assuming a 12V Battery:
   • A typical setup for a 200Ah battery would be at 12 volts.
   • The total energy capacity would be:
     Total Energy=200 Ah×12 V=2400 Wh 
2. Power Consumption of the TV:
   • Let’s say the TV consumes about 100 watts.
3. Calculating Runtime:
   • Using the formula:
     Runtime=2400 Wh/100 W=24 hours 

Factors Affecting Runtime

• Depth of Discharge (DoD): It’s recommended to avoid discharging lithium batteries below 20% to prolong their lifespan. This means you should only use about 80% of the battery’s capacity for practical purposes.
• Inverter Efficiency: If using an inverter to convert DC to AC power, consider its efficiency (often around 85-90%). Adjusting for this:
  • If the inverter is 90% efficient:
    Adjusted Runtime=24 hours×0.90=21.6 hours 

Conclusion

In ideal conditions, a 200Ah battery can run a 100W TV for approximately 21.6 hours, considering inverter efficiency and depth of discharge. However, actual runtime may vary based on specific conditions such as battery age, temperature, and usage patterns. Always ensure proper monitoring and management of your battery system for optimal performance and longevity.