Thread: solar charging

I've looking at getting portable gear to charge my ebike. But cost is that of another battery, so why would I bother? It's easier to take a spare, weighs similar and takes up about the same space. Would get me out of trouble if needed. Point is why is solar so expensive? can I get set up for less then a new battery?($900ish) I know from reading you need to match panels with smart boost controllers etc. But there is so much choice and little info on what goes together. So 48v with 19ah battery so around 920watts all up. Won't need a full charge per day(4hrs sun) but upto 50% would be good. Can anyone point me in the right direction at reasonable cost components that won't destroy my battery?
cheers