You will find that the Relay Bypass Switch Kit helps keep things steady during long test sessions.
UL Listed 12 Amp Power Relay Switch 12V DC Relay Coil, 5 Pin SPDT 1NO 1NC wit…
A nice touch is the gentle click sound this unbranded relay makes, giving clear feedback when it switches.
You will find that this relay handles a solid 500A, which feels reassuring when you're wiring up heavy loads.