The RSH-50VRM kits give total power protection for your minisplit or inverter units. These work by not only taking a surge, but for times when line voltage is all over the place and we see it going over the 253V threshold. Typically if it goes over 253V we are going to lose a board due to over-voltage. So this product is cheap insurance so you don't have to go back out. They are 120/240 and rated for 60amps. The two kits we stock are a surge protector, and line voltage monitor (part# 96421) and the other has the surge protector and the line voltage monitor but also feature a disconnect (part# 96424). This way its all in one box.