I am attempting to create a power-from-the-grid reliability metric. Along those lines I am looking for a device that records any instance of two events: a change in power state (i.e. available versus unavailable) a change in power quality (i.e. under or over voltage), I am not looking to measure current but voltage. I do not need remote connectivity/reporting of any kind. It should have either an SD card writer or USB flash drive writer for data logging. Ideally it would also have a rechargeable battery that can be recharged from the source it is monitoring. It should run for at least one month with limited or no power. At boot/setup/first run it should have a simple interface to set date and time and format the data logger’s drive if necessary and thereafter will only log the date and time of when there is a change in the power. I am in Puerto Rico which abides by US electrical codes. The data will be used to determine what locations are best served by auxiliary on-site power generators like solar panels, wind turbines, or fossil-fuel power plants.
My question then is: Is the hardware available from OpenEnergyMonitor’s shop overkill? As in too many features and hence a higher price tag than the bare minimum I need.