TwinfanI had Optimates for our motorbikes and they're superb, so I wouldn't buy anything else. I've just ordered a 20w solar charger plus the cigarette lighter adapter to keep my GT4 in tip-top condition during the lockdown. £135 all in which isn't cheap, however it's cheaper than a new battery and I can use the charger in the future. I may well keep it on charge 24/7 as my car is for weekends only and lives on my drive.
carolinewoodleyWill the cigarette lighter adapter in the glove compartment work to connect it to as I've read it has to be a socket that is always on i.e. powered without the ignition in? I don't have the "smokers' package" in my Cayman (which I think is an "always on" socket), but I don't know if the one in the glove compartment is the same. Also does the solar panel work if I left it on the dash, inside the windscreen, or does it have to be left outside? I don't know enough about solar technology to know for example whether the glass would attenuate the sun or block any frequencies that might make it less efficient? I could leave it outside the car as the car is easily visible from my bedroom window when parked in my off street parking space, but would prefer to leave it inside the car as I don't want to be looking out every 5 minutes to make sure the panel is still there!
Twinfan The 12v socket high up in the passenger footwell is the one to use. Connect everything up with the key in the ignition and the electrics on. Switch off and lock the car, job done. A decent panel will work inside the car windscreen but you'll need to ensure the one you buy is powerful enough. There's some good info and a power guide here: https://www.willgen.co.uk...charger-do-i-need.html
carolinewoodleyOK, so I've ordered the 20W panel and Optimate charger, some suction cups to fix the panel to the car windows and a cigarette lighter adapter. Will see how it goes with the car out a day or so a week, hopefully that combined with a 10 mile round trip to the supermarket every couple of weeks will be enough to stop the battery going flat! Thanks everyone for your help, these are unprecedented times and let's hope we can get back to enough semblance of normal that we can drive for pleasure again fairly soon.
TwinfanQuick update on the solar charger. I'm all hooked up and have gone from red to amber on the traffic light system after about an hour. I'll check it again later as I expect it to be green before sundown tonight. So it seems to be working a treat. The 12v socket in the passenger footwell seemed to power off on my 718 GT4 so I switched to the cigarette lighter in the centre console and that seems to stay live. My car has the smokers pack option but if you don't have that I think the socket under the armrest should stay live, although I've read that 981 Sypders don't keep any sockets live! Best to try each one if you're having issues.
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