Using AUX2 to control Air Conditioner

[australsolarier]

yes the 48volt system has all double pole breakers. because it is grid feed in it is required by australian/NZ standards. the 12v system ( island) has single breakers. here you also have to install non polarized dc breakers. for example if a string shortens, there is a reverse flow from all the other strings and can set the polarized breaker a fire. also many installers installed them the wrong way. the standards for solar installations between north america and australia are really different.