Hi I changed setting 1 to sol and setting 20 to 48v and setting 21 to 48.2. Setting 17 53.5v and 18 to 53v seeing as the batteries are 15s. I only use solar to charge . I have 6 canadian solar 550w panels. I'm running this system separate from my eskom db and had a electrician wire up the system to its own db all coc of course. I have a few dedicated inverter plugs points around the house running different things. Normally even now in winter my system is fully charged by about 13:30 depending on weather conditions and heater or aircon usage. So far it's been good. No complaints from my side. Although I did buy 2 inverters I decided only to use 1 and keep the other one for spare. I would probably get flamed on this forum for not using coms cable but so far for my use it's been good. If more info required on my settings just ask👍