diff --git a/packages/modules/devices/fox_ess/fox_ess/counter.py b/packages/modules/devices/fox_ess/fox_ess/counter.py
index adf3ab8c02..dc6a963434 100644
--- a/packages/modules/devices/fox_ess/fox_ess/counter.py
+++ b/packages/modules/devices/fox_ess/fox_ess/counter.py
@@ -18,7 +18,8 @@ def __init__(self, component_config: FoxEssCounterSetup) -> None:
     def update(self, client: ModbusTcpClient_):
         unit = self.component_config.configuration.modbus_id
 
-        powers = client.read_holding_registers(31026, [ModbusDataType.INT_16]*3, unit=unit)
+        powers = [val * -1 for val in
+                  client.read_holding_registers(31026, [ModbusDataType.INT_16]*3, unit=unit)]
         power = sum(powers)
         frequency = client.read_holding_registers(31015, ModbusDataType.UINT_16, unit=unit) / 100
         imported = client.read_holding_registers(32018, ModbusDataType.UINT_32, unit=unit) * 100