piotr529 wrote: Hello.
And the code 1.8.1.1 or 2.8.1.1 on Corax 3?
These are archival values from the previous accounting period, i.e. values from closing one period earlier, if the meter closes every month on the first day of the month, these are the states of energy consumed and energy delivered in the first tariff on the first day of the month.
1.8.1 active energy consumed current state tariff first or total (current state for today

)
1.8.1.1 active energy taken from the last closing of the billing period (e.g. on 01/02/2020)
1.8.1.2 active energy taken from the penultimate closing of the billing period (e.g. on 01/01/2020)
2.8.1 active energy donated (important for micro installations)
15.8.1 is the sum of 1.8.1 + 2.8.1 (i.e. both ways) usually displayed value when there are no micro-installations, regardless of whether the inflow in the outflow under the meter is properly connected, the energy will increase and show the consumer's consumption.