I worked at a place that monitored power usage minute by minute across 1000s of locations. We just used MySQL with a time column. Maybe I'm not the target audience but I'm failing to see what this gets me.

The problem is they say the data is imuatable and stored sequentially, allthough our data was imutable with devices on the net the data comes in random order when these ineviatably have connection problems.

We always aggregated our data into larger time blocks. Storage was cheap and doing comparative analysis across locations and time zones was always our pain point.

I think using a Postgres database is wise.