This 50W 7 Ohm resistor is a compact and reliable solution for pre-charging large inverters in 12V power systems. When an inverter or inverter/charger rated at 2000W or more is first connected to a battery bank, a large inrush current can occur, creating a dangerous spark and potentially damaging the inverter’s internal components.
Pre-charging with this resistor ensures the inverter’s capacitors are gradually charged, allowing the system to stabilise before full connection. This is a one-time step, only necessary before first use or after the inverter has been disconnected for an extended period.
The aluminium shell construction ensures effective heat dissipation, while the chassis-mountable design allows for easy integration into your setup. It is a straightforward yet essential component for any safe inverter installation in a 12V environment.
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