Air conditioning appliances draws a lot of power and require a large battery bank when not connected to shore power. For most RVs and boats you will need a minimum of 400 Amp Hours of battery capacity or more to run air conditioning. The size of the vehicle you are cooling and how often the AC unit will be running determines how many batteries you will need. For example, if you are running the AC intermittently, mostly at night, you may only need 3-4 hours of run time. If you are camping in a very hot climate and the AC is running continuously all night you may need 8-10 hours of run time. Smaller vehicles usually result is the AC unit running for less time each night.
Size of RV / Van | Hours a Day AC is On | Recommended Battery
If you are running air conditioning in your RV, van, or camper you need a way solar panel and battery system . To meet the high energy needs of an air conditioner many nomads use a generator or solar panels to power their air conditioner when off grid or RV camping. Here’s the strengths and weaknesses of generators vs solar panels.
To unshackle from shore power and the need to run a generator RV owners and nomads living the #VanLife are increasingly choosing to install solar panels and batteries that are large enough to power an air conditioner without the noise, smell, or health risk of a generators. The result is greater freedom to camp and boondock anywhere, increased health and safety, and more time in your day. You do some work to install the system once and then its maintenance free. No need to buy gas and refill the generator gas tank each day. No need to start an engine. No need to apologize to the neighbors for running your generator all night. Just free power from the sun keeping you nice and cool at night.
Determine the size of the power system you need by the size of the space you are cooling and the size of the air conditioner needed. Air conditioner size is measured in BTUs.
Size of RV | BTUs of Air Conditioner | # of Batteries | Recommended Solar Panel Capacity | Recommended Off-Grid Power System