Having the Somfy brand on a general purpose relay is a nice touch, especially if you already use their products.
95224-29850 Automotive Relay, 12VDC, 4Pins, 20A, SPST, Quick Connect, Plug In
I like seeing Functional Devices, Inc. listed as the brand; it feels reassuring and familiar.
Having the NOVITA brand on there is a nice touch, since it keeps things consistent with other gear.
The listing shows brand 935-2425-010-14, which helps when you are sourcing spares across different vendors.
The Power Relay/Battery Isolator engages smoothly, and you can hear a reassuring click at each cycle.
A nice touch is the DIN-rail housing, which makes swapping the relay later a lot less frustrating.
A nice touch is the crisp hum of the JQC-3FF-S-Z when it engages.
A nice touch is the auto-off and timer, and you can set it to shut down after a certain period.
With this 500A size, you get a stronger build, and it looks right at home next to beefy components.
The CSJ-38-70010 pairs nicely with socket bases, which makes swaps quick during maintenance.