Battery Monitor convert away from Sentinel

Has anyone disconnected the Sentinel monitor and used the same sensor wires for a battery monitor? 

I stuck with Sentinel for another year. The cost is 20 euro per month. Aside from the investment in a Cerbo GX, and the 5G PEP wave Max Transit, what do you pay for your subscription on the 5G PEP wave Max Transit?

Sentinel is not LTE modem and wouldnt make you WiFi network, it only broadcasts some boat data to their server which you can access using their app. Their pricing strongly depends on where you sail and where you dock therefore when they quoted 600EUR/year for thier SIM in Caribbean, I thought its a bit out of control. I got dual SIM Max Transit modem router which has both ethernet ports and makes WiFi network, therefore you can install all sorts of montoring devices, Cerbo GX,  CCTVs, switches, water alarms, motion sensors, turn on/off lights, so on so forth. I even run portable dehumidifier remotedly when my boat sits on the hard and control it from my phone depending on himidity level which I can also monitor via WiFi sensor. For SIM pricing, I got one SIM from local company in Antigua and Google Fi data SIM for islands hoppings. Local SIM costs lillte to none when I am away and I just buy mobile data package when I get to sailing. Google Fi charges 10$ per 1Gb of data and provides LTE speeds worldwide without roaming charges, it is ideal when I go outside local area. In principle, it would be ideal solution to use Google all the time but they dont like if you use too much mobile data outside the US, thats why getting local SIM is essential in my case. Cheers!