diff --git a/CHANGELOG.md b/CHANGELOG.md
index dfa460bd..4256ff31 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,10 @@ will consitute of a breaking change warranting a new major release:
 
 # [unreleased]
 
+## Fixed
+
+- Fixed wrong sign in calculation of total current within the `PWR Controller`.
+
 # [v7.7.3] 2024-03-18
 
 - Bumped `eive-fsfw`
diff --git a/mission/controller/PowerController.cpp b/mission/controller/PowerController.cpp
index 8fb774dc..e4ad9f81 100644
--- a/mission/controller/PowerController.cpp
+++ b/mission/controller/PowerController.cpp
@@ -182,7 +182,7 @@ void PowerController::calculateStateOfCharge() {
   }
 
   // calculate total battery current
-  iBat = p60CoreHk.batteryCurrent.value + bpxBatteryHk.dischargeCurrent.value;
+  iBat = p60CoreHk.batteryCurrent.value - bpxBatteryHk.dischargeCurrent.value;
 
   result = calculateOpenCircuitVoltageCharge();
   if (result != returnvalue::OK) {