Place battery cabinets away from heat sources and flammable materials. You must also look for environmental ratings like IP65, IP66, NEMA 3R, or NEMA 4X. Adhering to IP55 and IP67 standards prevents dust and water intrusion, making. Designing a battery box is about more than storage. Whether you're working on a camper van, an RV, a solar setup, or just need better home organization, the right battery box can make a huge difference. Add foam insulation and an optional door to keep them toasty in the colder months, giving you the best performance from your energy storage. Mounting Mechanism for Battery Cabinet 3.