Back in March after a series of flat or flatish battery moments I bought a solar panel from Maplin and have ever since when the bike is in the garage it is connected through the accessory socket. I blogged it back then, click on the "solar panel" link below, and never reported how good or crap it has been. Good. It has been excellent as it happens. Despite the lack of sun generally in the UK this year, it has been a total success. No flat battery problems and only one ABS malfunction that is usually associated with a low battery. Well worth the money. I would recommend it to anyone and everyone!