If you have a 20 amp solar panel, that's 12v X 20 amp or 240 Watts! My 20 watt panel gens out about 19 volts while charging at 1.7 amps. ----- JP Dempsey s/v Respite Rhodes 22 1989/2005 Marshall,VA -- Sent from: http://rhodes-22.1065344.n5.nabble.com/