The kWh Meters with AC Circuit Breaker Box (UL/CSA Certified) consists of two kWh meters and a circuit-breaker box. One of the kWh meters is used to measure the power transmission to/from the utility grid, while the other is used to measure the power transmission to/from the electrical power source (e.g., solar panels, wind turbine). The circuit-breaker box contains three resettable ac circuit breakers. All components of the module are UL/CSA certified.