The Excel-based software EnerCalC 2013 is a tool to simplify energy demand calculation of non-residential buildings based on the German standard DIN V 18599.

This new version includes the calculation and balancing of Net-Zero and Energy-Plus buildings using combined heat and power co-generation, photovoltaic as well as solar thermal renewables.

A more in depth description of this tool was posted before: EnerCalC: Simplified DIN V 18599 Excel Tool for Preliminary Design

The tutorials below are available only in German:

Introduction
Building Envelope Data Entry
Model Zoning and Mechanical Equipment
Interpretation of the Results
Balancing, Photovoltaics, Primary Energy