I have build the 12V powerbox a bigger brother. 8 280 ah cells, 3 kW inverter, daly bms. External ac feedback in, so the box doen't need to be opened to charge it. To tackle the ventilation of the inverter in a closed box, i have build in these closable ventilation holes, just at the fans of the inverter.
Powering a large grinder etc...no problem.
Powering a large grinder etc...no problem.
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