Thanks for all your help guys. One more quick query if I may ... Just got the solar panel out on the deck , nice sunny morning so thought I'd test it with a multimeter...so out the sensors in the xt60 plug , got readings of around 22 volts give or take. But on an amp reading a big fat zero ? Shoudnt be like that surely. Plug the phone into usb on the back of the panel and it charges phone though. Any thoughts ?