I would like to put my 12/3000/120 Multiplus inverter charger into search mode. The handbook says this can be done using free software and a computer, but it also states that 'Settings may only be changed by a qualified electrical engineer' and warns that the program is not designed to be used by owners/users. This sounds a bit scary, like I risk really messing things up if I try and do it myself. Can anyone advise?