Parked vehicle outside corner of home at 9:00 pm. Awoken by loud popping and hissing sounds at 4:45AM. Looked outside to notice a bright orange hue by vehicle. Realizing the car was on fire, we called 911 and proceeded to use garden hose to water down both the vehicle and the home that the car was next to, in order to try to prevent the house from also catching fire. Vehicle was not moved nor accessed during those 7 overnight hours. It was locked and we were all asleep. There were two other vehicles parked next to and behind the vehicle that caught fire - those two other vehicles sustained no damage to them. The house sustained some minimal siding warping from the heat of the fire. Fire chiefs reviewing the damage in person as well as viewing photos have stated that it appears to be battery or fuse box related as that side of the engine's damage was greatest as well as the battery and fuse box being completely destroyed by the fire. No warning lights or indications of system failures or malfunctions prior to parking the car. Vehicle was towed away from scene by insurance company. Unsure if vehicle is still at that lot or not. Insurance deemed vehicle totaled and issued check for losses.