Missing market of high power relays?
Calling these `relays' is probably the issue. You'll need contactors and be careful of derating your contacts to the kind of load, especially if it's DC (DC arcing is harder to quench!).
Another option is, as suggested in the comments, a starter relay. In some country they are called `solenoids' which is mildly incorrect, but whatever.
These things are huge, for example the first search result weight at about 450g. They are expensive too.
Just adjust your search keyword