Remote access of base unit

Is it possible to access the base unit remotely. I now have several clients using the IotaWatt solution but driving to them is not convenient at this time due to Covid

Yes it is. In the LAN router:

Set the IoTaWatt IP to a static address, preferably outside of the DHCP pool.
Set port forwarding to forward an external port number to the IoTaWatt IP and port 80.
Set an admin password in the IoTaWatt to secure access.