sensor resetting to 0 on inverter disconnect

[Daniel-Peeeh]

problem: values of pv-inverters overall produced kwh from time to time reset to 0. this happens

• randomly at night -> I think network connection between inverter (SMA) and cerbo is lost. reason unknown.
• on restarts of the cerbo device

solution in Hass could be to create a filtered sensor. See solution here: https://community.home-assistant.io/t/how-to-prevent-entity-from-resetting-to-0/369363/4

for me it would be bad solution to create new sensors. i already have 1 year of data collected for the sensors created by this addon. removing them from energy dashboard is not an option.

is there a way to prevent the existing entities of my 3 inverters to reset? a filter to not set 0 values would be enough.