Fix bug related to export slot timing on AC Coupled mode (#1707)

* Fix bug related to export slot timing on AC Coupled mode

#1704

* [pre-commit.ci lite] apply automatic fixes

---------

Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>

apps/predbat/prediction.py

@@ -695,7 +695,7 @@ def run_prediction(self, charge_limit, charge_window, export_window, export_limi
                 pv_dc = 0
                 diff = get_diff(0, pv_dc, pv_ac, load_yesterday, inverter_loss)
 
-                required_for_load = load_yesterday / inverter_loss_ac
+                required_for_load = load_yesterday / inverter_loss
                 if inverter_hybrid:
                     potential_to_charge = pv_now
                 else:

apps/predbat/unit_test.py

@@ -2906,6 +2906,9 @@ def run_model_tests(my_predbat):
     failed |= simple_scenario("load_only", my_predbat, 1, 0, assert_final_metric=import_rate * 24, assert_final_soc=0, with_battery=False)
     failed |= simple_scenario("load_bat_ac", my_predbat, 4, 0, assert_final_metric=import_rate * 24 * 3.2, assert_final_soc=100 - 24, with_battery=True, battery_soc=100.0, inverter_loss=0.8)
     failed |= simple_scenario("load_bat_dc", my_predbat, 4, 0, assert_final_metric=import_rate * 24 * 3.2, assert_final_soc=100 - 24, with_battery=True, battery_soc=100.0, inverter_loss=0.8, hybrid=True)
+    failed |= simple_scenario("load_bat_ac2", my_predbat, 0.5, 0, assert_final_metric=0, assert_final_soc=100 - 12 / 0.8, with_battery=True, battery_soc=100.0, inverter_loss=0.8)
+    failed |= simple_scenario("load_bat_dc2", my_predbat, 0.5, 0, assert_final_metric=0, assert_final_soc=100 - 12 / 0.8, with_battery=True, battery_soc=100.0, inverter_loss=0.8, hybrid=True)
+
     failed |= simple_scenario(
         "load_bat_dc_pv",
         my_predbat,