These breakers from MidNite Solar break their rated amperage load at 150 DC volts repeatedly and with no damage when mounted in a MidNite Solar enclosure. They have been evaluated by ETL to 150VDC and is listed for the U.S. and Canada. All of the NRTL listings still apply, making them suitable for solar applications. All MidNite circuit breakers hold 100% rated current independent of ambient temperature.
Always use a properly sized breaker for disconnecting.