@Frosted and anybody else interested. The AA 4.8w trickle charger arrived today. I have not connected to the car yet, but I did connect it to the 12v Battery that allows me to have an electric start button on the lawnmower. The Battery did not have enough charge to fire up the lawnmower last week, so back to the 'old fashioned' pull on a bit of rope trick. I used the Battery clips and connected to the solar panel. The weather has been cloudy here this afternoon and after the charger had been con