Hi going to be away for 3 weeks with the car parked up in a car park. Does the 12v battery keep topped up from the main drive battery and if so should I keep the main battery at 50% before I park up? Thanks in advance.

I cannot talk specifically for the iV, but from experience with the womanmobile which is hybrid, I was suggested by my workshop - ex-Toyota dealer employees - to keep always the main drive battery as charged as possible before long stays.

Thankyou that's very useful information

On 19/03/2025 at 11:52, BobT69 said:

Hi going to be away for 3 weeks with the car parked up in a car park. Does the 12v battery keep topped up from the main drive battery and if so should I keep the main battery at 50% before I park up? Thanks in advance.

In my experience with the iV the 12v battery isn't charged from the main battery unless the ignition is on. I was away for a month and had foolishly left a rechargeable torch plugged into the 12v socket in the boot. When I returned the 12v battery was totally flat, even though the HV traction battery was full, and the car was completely unresponsive. I had to manually open the door and bonnet & borrow a 12v charger from a friend to hook up to the 12v battery. After that I could "start" the car, and it began to recharge the 12v battery. Right PITA that was, I now have the 12v rear socket on an ignition-only supply.

ok thanks worth knowing! I thought the battery was in the boot? How did you connect under the bonnet please?

20 hours ago, BobT69 said:

ok thanks worth knowing! I thought the battery was in the boot? How did you connect under the bonnet please?

The battery is indeed in the boot, but there's a post inside the front under-bonnet fuse box for the +ve, and a bracket just to the rear of the fuse box for the ground.

Thanks great info

The 12v should be charged while plugged in also. Probably not possible when parked up for a trip away.