my leisure battery is not charging for some reason? i measured the voltage across it and it read 8.5 volts, left the vehicle running for a good hour and the voltaged rose by 0.5 v? was thinking it might be the switching relay? any ideas please?

The roof on my bongo is stuck up. It's the first time we raised the roof since buying it and it's got stuck in the up position. I'm not 100% sure that it's all the way up as the beeping won't stop. any suggestions welcome.