How Many Batteries To Run Rv Ac?

To run an RV air conditioner (AC) using batteries, you need to consider several factors:

1)AC Power Consumption: Most RV air conditioners range from 1,500 to 3,500 watts. For example, a common 13,500 BTU RV AC unit typically consumes around 1,500 to 2,000 watts (about 12-16 amps at 120V).

2)Battery Type:

Standard deep-cycle lead-acid batteries provide around 100 amp-hours (Ah) at 12V.

Lithium-ion batteries are more efficient and provide the same capacity at a smaller size/weight.

3)Inverter Efficiency: If your RV AC runs on 120V AC and your batteries are 12V DC, you'll need an inverter, which typically has an efficiency of around 85-90%.

Example Calculation:

• AC Usage: Assume your RV air conditioner consumes 2,000 watts.
• Amp-Hour Demand: 2,000 watts at 120V is roughly 16.6 amps.

If using a 12V system, that equates to 166 amps per hour at 12V (because 2000 watts / 12V = ~166.6 amps).

• Battery Size: A typical deep-cycle battery with 100Ah at 12V would provide 100 amp-hours (Ah), but since you shouldn't discharge it below 50%, you'll only get 50Ah of usable power.

Running Time with Batteries:

• If your AC consumes 166 amps per hour at 12V, and a battery provides 50Ah of usable power, it would run the AC for about 18 minutes per battery (50Ah / 166 amps = ~0.3 hours).

So, to run the AC for 1 hour, you would need about 3-4 lead-acid batteries. For longer periods, more batteries are required, or a more efficient lithium setup, where fewer batteries can offer longer runtime.

You could also consider solar power to recharge the batteries, or a generator for longer usage.