ModelBuilder , plz how summarize fields of Multiple feature classes ?

Question

I'm new to ModelBuilder , please help me.
I have created a script in python that gives results for each month, using ModelBuilder how can I make a sum between each field of each month of the year to have a single feature class with the totals. Here is a figure explains what I am looking for.

thank you !!

my probleme.png

khalidechlouchi · Answer

Thank you for your feedback and collaboration.

The script calculates the energy needs of a single featureclasse of buildings with climatic data for the 12 months of the year. Then energy needs are exported for each month in 12 FeatureClasses. Now I'm looking into how to sum the monthly energy needs into a single annual featureClasse with ModelBuilder.

ABishop · Answer

Hello,

I see there have been 64 ppl see this post and nobody has replied to you, so I will try to assist.

I see that your model builder already inputs the data into a single feature class?  Or am I interpreting the picture wrong?