I have just bought a 2 kva suitcase generator mainly for winter use.I would be the first to moan if someone left a generator running for any lengh of time but we are finding the cls we are useing are mostly empty this time of year so we are on our own.What i need to know is what is the best way to use it for battery chargeing ie direct from the 12 volt with leads and clips or from 240 volt useing the caravan charger bearing in mind if we are alone about 2 hours per day just to keep battery topped up.I use a solar panel summer time and this is usualy fine even for 2 weeks but with shorter days and more demand on the 12 volt it struggels after a few days .Any help would be apreciated.