TOU period discrepancy

Problems
#1

Ref: User ID 37052

For a long time now, I have noticed a small discrepancy with how pvoutput accounts for consumption readings occurring right on the transition between TOU periods. eg. today (02Jun17) just before 7am (ie. still in off-peak time) I used my kettle and its consumption reading appears correctly at the 5 minutely data point at 7am shown as follows:

tou0.jpg701×608 54.6 KB

However, when I use the API call get output or view the Analyse: TOU page on the pvoutput website, the kettle’s energy use in the last 5 minute window of the off-peak TOU period is incorrectly attributed to the peak TOU period instead of the off-peak TOU period in which it occurred eg.

tou2.jpg819×479 26.3 KB

Interestingly, the initial Analyse page on the pvoutput website correctly shows the kettle’s energy consumption as occurring before 7am, which covers the off-peak TOU period:

tou1.jpg744×482 28 KB

I notice this issue quite regularly, as I often try to use as much energy as possible before the peak power period commences in order to minimise overall electricity costs, however the last five minutes of off-peak consumption keeps getting incorrectly counted as peak consumption and therefore throws my TOU statistics off slightly. I request that this discrepancy be rectified. Thanks.

#2

The 5-minutes from peak has now been moved to off-peak on the analyse screen -

https://pvoutput.org/analyse.jsp?id=37052&sid=34002&dt=20170602&h=tou

#3

Thanks. I’ll check it out tomorrow morning as today is a full off-peak day.

Another thing while we are on the Analyse TOU page, I note that the energy data being used is total energy consumption for the day, which with solar power providing covering some of that energy consumption is not very meaningful when displaying peak and off-peak data. eg. the link you provide above shows that a very high 90.2% of my energy consumption came from the peak period, but that is not the same as showing what my more meaningful peak energy import was for that day which was a substantially lower percentage of my daily energy import. ie. shouldn’t the peak/off-peak percentage be based on my total energy import for the day (3.015kWh) which actually represents my entire peak/off-peak energy consumption? This would make the peak/off-peak percentage split be a more realistic 38/62% for that particular day an hence align with what my power meter is actually recording.

#4

Seems to be working correctly now for this morning’s data set. Thanks for the fix BB!

In addition to my new total vs import energy consumption on the Analyse TOU page question above, just wondering whether you did the same 5 minute window shift fix for the switch back to off-peak to peak?

#5

It should also work for the transition from peak to off-peak. If not, post a comment/screenshot.

#6

No worries. I’ll take your word for it that it has been done.

Any comment on my total vs import energy consumption on the Analyse TOU page question?

#7

The percentages are based on gross consumption rather than net import values.

#8

Yes I know that, but from a peak vs off-peak perspective it doesn’t make sense to do it using gross as some of the consumption comes from solar which is neither peak nor off-peak. I personally would rather see what my peak / off-peak split is, consistent with my house’s power meter. Is this something you could change or maybe give an option to select which baseline, gross or net import, will be used?

#9

This should be posted as an enhancement request under the Ideas category.

#10

OK. Thanks (plus extra characters)