SeaBee Mike, if you connect two panels together, you must connect them in parallel (plus to plus, minus to minus) which keeps them outputing the same votage, but doubles the current. If you connected the panels in series, plus to minus and plus to minus, that doubles the voltage, while keeping the same current. The electronics module is expecting 24 volts and NOT 48 volts.
Tgtaylor64 - The buss bar is a direct connection to the battery, so I would try it, but if you have radios, check for noise on them. The electronics module pulses high voltage to the batteries. If you run radios, check for interference before making it a permanent setup.