Mountain Wind Trading CompanyDC - Volt / Amp meter digital display 18 volt, 250 amp maximum will work with 12 and 24 volt battery banks Use for wind turbines or solar panels accepts up to 0/2 cable in and out Note: This meter must be connected to the battery at all times. If it is disconnected from the battery and allowed to see open voltage it WILL burn out. It cannot see anymore than 28 volts. It does not have an internal fuse.