If the panel is wired directly to the battery with no charge monitor in the line the battery will overcharge. Look for a monitor in the line; it is just a small box. My panel iswired through a monitor to the battery. I have a disconnect switch which removes everything from the battery except the solar when the camper is in storage---keeps the battery 100% even in the snow.
I have a pair of 120W solar panels on our roof, and they run through a solar regulator. I would NOT want a solar panel of any significant wattage connected directly to the battery as the battery could be dangerously overcharged. Many (all?) solar regulators have some intelligence in them so they will put lots of amps in to the battery when it's low, some when it's close to full, and trickle charge when almost full...then no amps whatsoever when the battery is fully charge.
Do you happen to know how many watts the solar panel is?
Chris
We have bought a number of solar items from these guys http://www.solar-electric.com/ . They do not install but they can design a quality system for anyone. We recently help a family member with their new 2011 CYCLONE they bought from Heartland. They now have a 1,200 watt system on their RV, which is bigger than ours. Solar panels are cheap nowadays.