A canopy keeps direct sun off the paint, but the air under it on an August afternoon is still far hotter than a basement. Heat evaporates electrolyte and speeds up corrosion of the plates inside the battery. That is why batteries in the UAE commonly last about 2 to 3 years, and outdoor cars sit at the short end.
Remraam also sits away from the main employment areas, so cars either do a long daily commute, which suits the battery, or stay parked most of the week. The parked ones lose charge slowly to the alarm and keyless system. A weekly drive of reasonable length keeps them alive.