The DC circuit breaker can be used to disconnect solar panels from the inverter and isolate cables connecting the panels to the inverter. As the power flows only one way in solar panel systems, the DC circuit breaker will not function under load conditions to cut power from the panels to the inverter. More details on solar panel safety precautions are available online.

1. Solar Panel Safety Precautions

2. Solar Panel Safety Precautions

3. Solar Panel Safety Precautions
The DC circuit breaker can be used as an isolating
device to disconnect the PV panels in the inverter and
to isolate the cable (joining the panels for the inverter)
in the PV panels. Since the supply is only one-way
only, in the PV modules for the inverter the DC circuit
breaker will not, under any conditions, function with
load.

4. Solar Panel Safety Precautions

5. Solar Panel Safety Precautions
Get more details on
http://www.energysmart.com.au/solar-panelssydney/