diff --git a/ev_charger.py b/ev_charger.py
index fe97c0f..4fd3928 100644
--- a/ev_charger.py
+++ b/ev_charger.py
@@ -70,6 +70,7 @@ def device_init(self):
             Reg_u16(5018, '/Current',    10, '%.1f A'),
             Reg_u32b(5019, '/ChargingTime', 1, '%d s'),
             Reg_u16(5021, '/Ac/Energy/Forward', 100, '%.2f kWh'),
+            Reg_u16(5024, '/Ac/Energy/System', 100, '%.2f kWh'),
             Reg_e16(5026, '/Position', EVC_POSITION, write=True),
             Reg_text(5027, 22, '/CustomName', little=True, encoding='utf-8', write=True),
             Reg_u16(5049, '/AutoStart', write=(0,1))