Stonekeeper

Electrical gremlins can be traced to earthing problems. In a 13 year old car check the negative to body connections and clean them up.

If you only bought the battery 12 months ago it should still be in warranty

The "click" is the solenoid on the starter motor activating but not sending the power through to the starter motor. Bad earth Poor connections Failing solenoid Failing starter motor It shouldn't be a 12 month old battery if it's the right one.

I use an axle stand and bathroom scales 😉 I normally aim for 75kg by distributing weight. This mentions Caravans but it applies to all trailers

The answer from AI as to why short trips drain a full battery and the possibility you will have to "maintain it" by trickle charging periodically to stop it going flat. "How the smart charging system works Instead of constant charging, a vehicle's Engine Control Unit (ECU) manages the alternator based on a variety of factors: Battery state of charge (SOC): When the battery needs to be topped up, the system increases the alternator's output. Once the battery reaches a certain level, often around 80%, the ECU can reduce or stop the alternator's charging output to save fuel. Engine conditions: During acceleration, the ECU can temporarily reduce the alternator's load to provide more power to the drivetrain. When the car is decelerating or coasting, the ECU increases the alternator's output to maximize energy recovery, a process known as regenerative braking. Electrical load: The alternator's output is adjusted in real-time to meet the vehicle's electrical demands. When accessories like the headlights, air conditioning, and heated seats are on, the alternator is commanded to increase its output to prevent the battery from draining. Consequences for vehicle owners This adaptive charging system has several notable effects: Less-than-full charge: Many vehicles with smart charge technology deliberately do not maintain a 100% battery charge level to maximize fuel savings. This makes it more likely for the battery to be in a state of partial charge. Sensitivity to short trips: Drivers who frequently make short trips may not give the alternator enough time to fully recharge the battery. Over time, this can lead to sulfation, a process that diminishes the battery's capacity."

If never towed before this is useful.

Isn't the bounce governed by the tongue weight of the trailer, does the boat have outboard motor/s on the back?

Insurance renwal time what a relief

It will make more noise and nothing else but I think your Son should have no influence on your Car. When he is able to afford his own he can make his own decisions. It's a life lesson.

In the UK though the chances are they will charge for the diagnostic then charge it up and give you the car back. Best to have done that yourself before taking it in.

I agree with this too. "If you build it they will come"

Unless you buy an ev with very limited range in the first place. because if there was no facility at your destination you would arrange your rest stop at the last one available. I cannot off the top of my head think of anywhere in the UK more than fifty miles from electricity. I have never said EVs suit everyone but there is now an EV to suit everyone but they may be out of reach financially.

At 9:26 the battery voltage was 12.2v but appeared to have no trouble starting the engine at 9:29 14.9v engine running alternator charging If you left it running until 10:05 got up to 12.6v engine stopped surface charge dissipating until 10:06 12.4v no data to see if this carried on back down to 12.2v Data visible suggests the Battery is very low on charge. The scanner says battery condition currently ok at 12.6v 10:05 Now you have the scanner I would charge the battery up with a charger that tells you it's done or for a good few hours Negative charger lead to the body where the negative battery/bms lead goes It should not drop to 12.4v that quick if it was fully charged in the beginning. Unless there is a big load on it whilst you did the above. But the being almost flat and allowing for surface charge dissipation results in 1/2 an hour are not enough. Plug it in again starting with a charged battery. You never answered how many miles the car had done before you got it. Just 4,000 miles since, it's important, if the car has sat untouched for six months of it's life the battery could be knackered.

I fully agree with all the above. I am 1 year into my EV journey and so far have no regrets, coming from a very Diesel focused history. At Home it's charged. Any day when the distance is further than range at departure. When parked if there is a plug available it's plugged in. (like having to pay to park) If there is enough to get home it's not. Not once have I been worried about running out. I am only a 6/7,000 mile annual user but it would make no difference to the how only the cost.

Maybe the danger is that if they can use the VIN and home and email addresses to get through the app go to his house and unlock the car?

You cannot mis-fuel an EV A Morrisons petrol station mix-up has left several drivers with damaged vehicles and one facing a repair bill of almost £3,000. https://www.theboltonnews.co.uk/news/25531698.morrisons-petrol-station-blunder-leaves-driver-3k-bill/?ref=rss

Reading Sixt's EV energy policy it suggests they have no way of charging them up. AI "Return policy Standard policy: You must return the vehicle with a charge level equal to the level at pickup, which is a minimum of 80% for most rentals. Under 80% pickup: If the vehicle was supplied with a charge lower than 80%, you must return it with that same charge level. Charging fee: If you do not return the vehicle to the required charge level, you will be charged for the missing kWh at rates comparable to public fast-charging stations." Implication is that if it is returned low it will be rented out low. Enterprise do this with ICE they take a photograph of the fuel gauge at pick up. Maybe they make money on the missing fuel/energy?

At 12.4v the stop/start will be switched off. How long after disconnecting the charger did you get the reading 13.2v, it's best to leave it a little while, 10-20min, to allow "surface charge" to disappear. It could stop at 12.8v. If it drops below 12.6v it wasn't fully charged. There are special chargers for stop/start batteries It would be useful to know the battery's resting voltage after an hour so of getting home. Check that nothing, not even a cable for a camera or phone etc, is plugged into anything that may be permanently supplied. To eliminate aftermarket parasites Then check the reading after overnight. The charging system in your 2024 is not the same as your 2015

Hopefully, a good 3 hour drive may fix the problem.

I agree it's not impossible for a faulty component to have been installed at the factory but I find it best to eliminate other simpler possibilities before taking it to the main dealer for a diagnosis and repair under warranty. They will initially almost certainly just dismiss with charging the battery back up properly then giving it the customer back. Especially stop/start because there are so many reasons it deactivates. If the op had said the crossed out a was not visible it may be different. But that does suggest it's working. One question i have missed is "When the op charged the battery where did he connect the negative lead of the charger if the battery remained connected in the car?" and "What charger was it and for how long?" sorry that's two questions.

When the a with the line through it appears it means the stop/start system is operating but has chosen not to stop the engine because the battery is not within the parameters required for the system to function. There maybe too many other demands on the battery Aircon, cooling fan , headlights, heated seats etc. Or the battery is below 80% or a combination of all above. I would doubt the battery or alternator have a fault with the age of the car. Potentially it is use and the demands of the eu that is stopping it working. To explain or prove that theory needs a bit of the cars history What is the mileage now and what was it three months ago at 9-10 month old. Are your trips often or not and short or long journeys https://www.varta-automotive.com/knowledge/articles/article-details/start-stop-does-not-work

Do you not see either when it is working?

Do you get either of these on the display