Sms/call on/off control of Victron Multi II inverter

nyoffgrid

Hey all, 

I have an off grid cabin with no solar (I charge with generator). I want to switch on my inverter remotely when I am away.

I plan on doing this using a gate opener I found on amazon that uses a sim card for sms and call on/off. I will connect it to the dry contact relay of my invertor to switch it on via sms. that is the general plan. 

Hoping someone here will be kind enough to review the specs of the items I ordered to make sure it will work.. 

My inverter is PMP242305132 MultiPlus-II 24/3000/70-50 2x120V (UL)

This is the gate opner: https://a.co/d/eAVVibM
I will also connect two SPDT switches. one between gate opener and battery (to kill power to it when I am at the cabin and don't need it to run) and another between gate opener and inverter so I can switch the inverter on or off via the manual toggle instead when gate opener is switched off. For this I picked these SPDTs. please let me know if this will not work of if it is not compatible. 

https://a.co/d/809z8iB
https://a.co/d/38dyj7F