This blog post explains the key differences between deep cycle and dual-purpose batteries, with a focus on their applications in motorhomes.

• Deep Cycle Batteries: These are designed to provide a steady, consistent power supply over long periods. They are ideal for running appliances like refrigerators, water pumps, and lights when you are off-grid. A key feature is their ability to be deeply discharged (down to 80-90% of their capacity) without being damaged.
• Dual-Purpose Batteries: Also known as cranking batteries, these are designed to deliver a powerful burst of energy to start an engine. While they can also power some accessories, they are essentially a compromise between a starter battery and a deep cycle battery.

The article recommends deep cycle batteries for those who spend a lot of time off-grid and have high power demands for their appliances. Dual-purpose batteries are better suited for shorter trips with frequent engine starts and lower power needs for accessories. The post also highlights the advantages of LiFePO4 (Lithium Iron Phosphate) batteries, which are lightweight, have a longer lifespan, and are maintenance-free compared to traditional lead-acid or AGM batteries.