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  1. please can you help me I have my 3kva on grid Mecer inverter which is keep on beeping. the problem starts by the time ask my brother to change battery and he connected it wrongly. He put positive to negative on battery connections. so please can I fix it and which thing might be burned. because I tested the fuse are ok. Please help me
  2. please can you help me my friend connect a mpp inverter 3kva on grid wrong on dc power.so now its keep on beeping . how can I fix the fault
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