I like Lefty's answer. Solar panels are by nature current limiting. I use solar for my routers, and they are 135w solar panels. That is about 7.5A at 17 volts. That same panel also produces 7.5A at 14 volts. It produces about 7.5A at 9 volts, and about 8A short circuit. That is the case with these PWM chargers.
http://www.solar-electric.com/stpwmchco.html
If you want more current, then consider a MPPT charger. It keeps the panel output voltage at the correct level for maximum amperage output.