Query the PV power generation point (PVEnergyTotal) of an inverter: today / month / cumulative values, in the time zone of the power station to which the inverter belongs.Notes:
Data is settled by the platform. If the data is not generated yet - e.g. the device is offline, or posting for the day/month is not finished - the corresponding field returns -1 (please retry later). 0 means a real zero.
No model adaptation: devices that do not report the PVEnergyTotal point always return -1. Grid-tied inverter generation remains available via /op/v0/device/generation.
Service failures are returned as error codes, distinguishable from data states.