Current problems may be encountered when connecting the 5000W pure sine inverter to a 48V DIY battery equipped with a 250A BMS, if you want to ensure the maximum success of the connection between the inverter and BMS, there are two ways to solve them.
- A pre-charge resistor might be necessary for charging the inverter’s capacitor. When you first connect the inverter, the inverter’s capacitors may need to draw a large amount of current in an instant to charge. This process may cause an instantaneous drop in the battery’s voltage, which may trigger excessive discharge protection of the BMS, causing the BMS to shut down the inverter to protect the battery. A pre-charge resistor can limit the current when the capacitor is charged, thereby mitigating the current shock and helping to prevent the BMS from over-discharge protection triggering.
- The inverter’s capacitors have the potential to rapidly demand a significant current. If you possess a charger, please activate it. It may provide enough current to bridge the gap to prevent the BMS from shutting down. Alternatively, you would still have to set up a pre-charge resistor.
MORE: How do you “activate” the BMS after putting the battery in?