diff --git a/system/hardware/power_monitoring.py b/system/hardware/power_monitoring.py
index 4151aab4..9e13dd6d 100644
--- a/system/hardware/power_monitoring.py
+++ b/system/hardware/power_monitoring.py
@@ -13,10 +13,10 @@ CAR_BATTERY_CAPACITY_uWh = 30e6
 CAR_CHARGING_RATE_W = 45
 
 VBATT_PAUSE_CHARGING = 0.1           # Lower limit on the LPF car battery voltage
-MAX_TIME_OFFROAD_S = 30*3600000000000000000000
+MAX_TIME_OFFROAD_S = 300000000*3600
 MIN_ON_TIME_S = 3600
 DELAY_SHUTDOWN_TIME_S = 300 # Wait at least DELAY_SHUTDOWN_TIME_S seconds after offroad_time to shutdown.
-VOLTAGE_SHUTDOWN_MIN_OFFROAD_TIME_S = 60
+VOLTAGE_SHUTDOWN_MIN_OFFROAD_TIME_S = 600000000000
 
 class PowerMonitoring:
   def __init__(self):