I have several different chargers. First I have a trickle charger which provides the very least current and works well to keep my motorcycle battery up to full. Won't be good for a MH, tho.
Second I have a HF solar panel, good for 15 Watts. Marginal and will recharge my MH starting battery in a a week or two depending on how low it is.
Third I have a small-scale charger I now keep on my starting battery and it will recharge in a few days, again depending on how low it is.
Fourth I have a garage charger which will send 10 Amps to the battery. I use it occasionally at home for any vehicle but I don't schlep it around with me in the MH.
I am thinking about roof-mounted solar for the future.