From cf55f00656bde956d408567404132aafe8b81115 Mon Sep 17 00:00:00 2001
From: Chiara Anselmetti <40397544+chiaroo@users.noreply.github.com>
Date: Thu, 6 May 2021 15:56:49 +0200
Subject: [PATCH] Delete capital costs at battery discharge link (#240)

Hey guys,
please correct me if I'm wrong, but I think pricing both the charge and discharge of the battery store component with the inverter's capital costs results in duplicating costs since a bi-directional inverter is considered (I checked the source of the cost assumption, Budischak 2013).
Before working with PyPSA-EUR, I have worked with the toy model WHOBS where only the charging-link of the battery store component is priced with its capital costs (cf. https://github.com/PyPSA/WHOBS/blob/master/run_single_simulation.ipynb). The proposed change in code is equivalent.
---
 scripts/add_extra_components.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/scripts/add_extra_components.py b/scripts/add_extra_components.py
index b957ca40..946c4433 100644
--- a/scripts/add_extra_components.py
+++ b/scripts/add_extra_components.py
@@ -152,7 +152,6 @@ def attach_stores(n, costs):
                bus1=buses_i,
                carrier='battery discharger',
                efficiency=costs.at['battery inverter','efficiency'],
-               capital_cost=costs.at['battery inverter', 'capital_cost'],
                p_nom_extendable=True,
                marginal_cost=costs.at["battery inverter", "marginal_cost"])