I would like to calculate the quarter-hour peak in kW of my imported electricity. Eg:
- 19.15 u. : 4511,123 kWh
- 19.30 u. : 4511,623 kWh → 0,500 kWh, which is 0,500 kWh / 0,25 h = 0,500 * 4 = 2,0 kW
- 19.45 u. : 4512,248 kWh → 0,625 kWh, which is 0,625 kWh / 0,25 h = 0,500 * 4 = 2,5 kW
Is this possible with Emoncms? I have a SDM630 installed and can read its registers with modbus, eg. register 72 can read ‘Total Import kWh’ (see page 2 of the SDM630_MODBUS_Protocol.pdf). I already have this one as input in emoncms (namely
EI = Energy imported) and I log this one. But maybe another register is more suited?
The reason is that billing will change in Belgium. Some part of the price will be related to the quarter-hour peak in kW. The reason is that a grid can’t be build for the average demand, but should be build for some peak demand. If I plug in an BEV, cook, use the dishwasher, … all at once, it will cost me more than plugging in one after the other.
The highest quarter-hour peak in kW per month will be logged by the ‘smart meter’ (at the moment I still have my analog Ferraris meter). The 12 month quarter-hour peaks will be averaged and that value will be used for the billing. And that is the reason I would like to know them, so that I can learn what ‘activities’ cause a high peak.