If you use the ALtUI plugin on Vera to give you a decent UI (and why would you not?) then you can send selected data directly to InfluxDB, which in turn can be accessed directly by Grafana. No need for node-RED at all, unless you have some other requirements.
Edit: Actually, at a pinch, you wouldn’t have to use AltUI at all. It’s just that it gives you an easy way to select which variables you want to archive.