Review on ANJOSHI Circuit 50A 300A Protection Inverter Replacement Parts by Robert Hardin

I bought four of these (250A, 200A, 150A, 30A) for my 300A lithium battery power station. I have 1.2kW and 2.2kW pure sine wave inverters connected to 150A and 200A circuit breakers. I had problems when trying to run a large load (1kW and above). After about a minute, the input voltage of the inverter drops to 4.5 volts. I blamed battery problems and inverters, thinking there shouldn't be any circuit breaker problems. Then I decided to measure the voltage on 2 terminals of the circuit breakers and test the battery and the inverter with high loads. Initially the voltage is millivolts, but after about a minute there will be a 6 to 8 volt drop across terminal 2. The circuit breakers act as a 500W heater. I have tested all 150A, 200A and 250A circuit breakers and they all behave the same. I've bought various 200A circuit breakers that cost twice as much for high load testing. This works without any problems.