How is lifetime generation determined?
- Is it the uploaded reported total of the daily, weekly or monthly values?
- When editing the daily values due to gaps or upload interruptions, does the lifetime use these corrected values or (1) above?
Some inverters ( maybe most? ) provide a lifetime figure for energy generated in Watts Hours ( or kWh ). It starts at 0 and goes up forever. Some inverters provide a daily figure which resets to 0 every night. Some inverters including my Fronius Symo provide both figures. A daily figure can be calculated from the lifetime figure by subtracting the previous day’s life time figure from the current lifetime figure.
If you use the PVO API https://pvoutput.org/service/r2/addstatus.jsp to upload data you will need to select the c1 flag ( cumulative ) that matches the data that you are uploading I.e. lifetime or daily.
In some threads you will see a comment along the line that “ it will sort itself out after midnight “. This is the case with lifetime vs daily figures.
I hope that this answer helps.
If that is the case and given possible longevity of some panels, how does replacing inverters affect this?