Deck for Battery & Solar Panel Mounts

Design a rear deck for multipurpose use: - Have battery mounts (QTY: 4) out of 30x30x3 Mild Steel Angle to securely contain the battery array behind the cab of the vehicle. - Have the deck being able to tilt in order to access the battery array/wiring for maintenance purposes. - Have the deck large enough to mount 1600x600mm Solar panel to passively recharge the battery array.