Sum Today sensor values to Total sensor

I have a on grid solar plant which transmits today production and total production values to HA. The today production sensor gives values in float type such as 0.2kwh,1.2kwh,2.2… etc but the total production sensor gives values as integers such as 1kwh,2kwh… etc.

Because of this difference the today sensor is more accurate and realtime than total. To overcome this I want to add the today values together to form a new total sensor. I have read about utility meter interation but dont think it will work since the today sensor resets itself. Also looked into statistics sensor but the number of sample sizes is a problem.

Hope someone can help.

PS: I have tried to looked into how can change this in the integration but it seems the logger which is attached to the inverter is programmed to sent integer values for total and so cant be changed unless the firmware of the system is changed.