Index: src_plugins/export_openems/openems_xml.c
===================================================================
--- src_plugins/export_openems/openems_xml.c	(revision 32017)
+++ src_plugins/export_openems/openems_xml.c	(revision 32018)
@@ -265,6 +265,20 @@
 	rnd_fprintf(ctx->f, "          </Box>\n");
 	rnd_fprintf(ctx->f, "        </Primitives>\n");
 	rnd_fprintf(ctx->f, "      </ProbeBox>\n");
+
+	TODO("Check if it is true:");
+	/* excitation is always fed in on port 1 */
+	if (ctx->port_id == 1) {
+		rnd_fprintf(ctx->f, "      <Excitation Name='port_excite_1' Type='0' Excite='0,0,-1'>\n");
+		rnd_fprintf(ctx->f, "        <Primitives>\n");
+		rnd_fprintf(ctx->f, "          <Box Priority='999'>\n");
+		rnd_fprintf(ctx->f, "            <P1 X='%mm' Y='%mm' Z='%mm'/>\n", x, -y, e2);
+		rnd_fprintf(ctx->f, "            <P2 X='%mm' Y='%mm' Z='%mm'/>\n", x, -y, e1);
+		rnd_fprintf(ctx->f, "          </Box>\n");
+		rnd_fprintf(ctx->f, "        </Primitives>\n");
+		rnd_fprintf(ctx->f, "      </Excitation>\n");
+	}
+
 }