Calculating daytime load power

7 comments started 2024-04-06 last 2024-04-08
GivEnergy Products
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#1 SteveUK

Is there a way of finding the total load power used during the daytime (7am to midnight, ie the peak period)? It's the total solar generation plus battery discharge during this period. I can estimate, the latter from battery percentages at 7am and midnight but wondered if there was any other way of getting this figure. We are seeking to minimise grid import during the peak period (7am-midnight) - its often zero of just a few kwh - but it would be helpful to be able to monitor total consumption outside the off-peak period (during which the battery is charged)

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#2 cluelesscris

Unless I'm missing something but your dashboard gives you this straight off using the Energy Graph panel:

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#3 SteveUK

Ah, I thought I might have missed something. Yes, I think this provides what I want as all the solar will be in the period 7am-midnight and all the battery discharge also be (as its set to charge midnight to 7am - although usually reaches the set charge level within an hour or two). Looking back a few days there are a few blue (battery discharge) spikes during the period midnight to 7am. I don't know what these are but they seem to be relatively short so, hopefully, won't affect the figures much

#4 Tenkaykev

SteveUK
Fridge/ Freezer compressor kicking in ?

#5 Simon_C

SteveUK, you could also have a look at the 'Inverter Data' on the 'My Inverter' page. Then select 'Meter Data'.

Then lookup the 'Consumption Today' values for your chosen start and end time and calculate the difference between the 2 values.
Not very user friendly, but it will provide more accurate values than the other dashboard charts which are compiled from snapshot values every 5 minutes.



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#6 SteveUK

Simon_C Simon_C Thanks, that is very helpful. The figures given in the meter data for total consumption between 7am and midnight are typically 2-3 kwh less than those derived from the total of solar generation and battery to home shown in the Energy Graph. It's also interesting to note that there is no evidence in the inverter data of the occasional battery discharge spikes on the power graph at night - (eg when the immersion heater turns on) so I assume these are very transitory.