hi I have a total solar array of 600watts . two panels that are rated at 220 each and two renogy panels at 100 watts each my max solar is about 270 watts with the 100/20 mppt. I wanted to add install another 100/20 mppt to the same battery bank so I can get the total wattage of my solar panels . my question is can I just connect another 100/20 or a 100/30 model use two victron mppt. will I need a victron battery shunt so the mppt can communicate or not required ? thanks again ! u guys are awesome