Group calculations

[FlokkieB]

Hi

i have setup several powercalc sensors some time ago. Some of them are lights. I trying now to group them in new powercalc sensor ‘totall’. Thats causing a huge first measurement as it calculates all the previous values of the individual light as the first day calculation of the total powercalc group. What can i do to group those lights without resetting allthe previous measurent?