Its likely you will have to go through the pairing process every time you visit each house. Each charger will have its own serial number and may become a bit of a faf. Having a seperate app for each charger if allowed on the same phone or the use of two phones would most likely be the better way to go.
If Ohme allowed more than one charger to be daisychained of each other, it would be easier to acheive but they don’t.