FAQ.md

@@ -11,6 +11,10 @@
     * Check your command for spelling mistakes and unwanted spaces. The path to your data may also not contain spaces.
 * **I set a constraint (like emissionCap) to 0, but backbone seems to ignore it.**
     * GAMS does read parameters with the value 0 as if they were not there. To set a constraint to 0, set it to "eps" instead.
+* **There are no renewable powerplants in my results, although I have set them up in the input file.**
+   * There are two common mistakes here:
+      * renewables may not have a conversion coefficient, as they do not convert energy from one grid to another. Leave the cell for conversion coefficient empty.
+      * If you have an investment option for your renewables: check the parameter p_msWeight in the schedule.init/invest.init. It should equal $`\frac{8760}{\text{timesteps in your model}}`$. As costs are always calculated per year, this parameter is necessary to also scale revenues to one year. If it is too small, the revenues of your powerplants are underestimated and therefore, there is no investment.
 * **I have a powerplant with zero capacity and no investment option, but it still shows up in my results.**
     * If a parameter is 0, backbone treats it as if it was not set. In this case this leads to backbone assigning an infite capacity to your powerplant. Use capacity = eps instead.
 * **I have set an emissionCap/energyShareMax/energyShareMin, but my model does not seem to care.**