I'm not much on electric solenoids to open and close stuff with, but it would seem to match the solenoid to the amount of pull it takes to release the latch. How about checking it with a fish scale and see how much it takes to release the latch, then get a solenoid that meets or exceeds that amount?? Make sure you have a backup manual release so you can get in the thing if you have electrical failure or a dead battery!!!