Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: springfall2008

apps/predbat/tests/test_infra.py

@@ -404,10 +404,10 @@ def get_default_config(self):
             "inverter_clock_skew_discharge_end": 0,
             "set_window_minutes": 0,
             # Car charging config for each car (postfix _0, _1, etc.)
-            "car_charging_rate_0": 7400,
-            "car_charging_rate_1": 7400,
-            "car_charging_rate_2": 7400,
-            "car_charging_rate_3": 7400,
+            "car_charging_rate_0": 7.4,
+            "car_charging_rate_1": 7.4,
+            "car_charging_rate_2": 7.4,
+            "car_charging_rate_3": 7.4,
             "car_charging_battery_size_0": 100.0,
             "car_charging_battery_size_1": 100.0,
             "car_charging_limit_0": 100.0,