I like that this heavy duty relay seems built for real work, not just occasional hobby projects at home.
Schaltbau C320K 1000 24E BBBB 1000A 1500V DC Contactor 24VDC Coil 1-1614-356011
The auto-off really shines when you forget a device running and it gracefully powers down on its own.
I noticed the G2RL-14-E 5VDC model, and it helps me plan the rest of the circuit.
You will find that this relay runs on DC 12V, making it straightforward to integrate into your setup.