Just been reading up on these on the forum and in reviews. Will be looking to connect via the OBD2 port to save running cables all over the place. Interested in the Halfords and AA models. Halfords mono crystalline are supposedly more efficient, cheaper with current discounts and vouchers but have what looks like simple metal frames and size unknown. AA TFT models less efficient, huge but car friendly frames.

Anyone used any of these, or know the physical size of the halfords models? Will be in the windscreen facing almost due SSE to hopefully keep battery topped up a bit with my short infrequent journeys. Just visiting, Chris

2014 FFRR 4.4 SDV8 Autobiography Barolo Black
2012 RRS SDV6 HSE Baltic Blue - Gone

I can’t help on this charger but I do short trips as well, I put an optimate charger on once a week or every other for a day and that seems to keep the battery happy.

Hi i did use a halfords solar charger using obd port and it worked fine for the batery was always good for starting.

Thanks guys
I ordered an AA 4.8W on Thursday because I didn't like the angular metal frames on the Halfords ones. Will play with it on my old battery on the upcoming sunny days and see what it can do. Just visiting, Chris

2014 FFRR 4.4 SDV8 Autobiography Barolo Black
2012 RRS SDV6 HSE Baltic Blue - Gone

I have used the AA charger through the OBD port many times when I leave the car at an airport, never had a problem even when left for nearly 3 weeks