diff --git a/hpcs6500.py b/hpcs6500.py
index 242cedf..f23aa2e 100644
--- a/hpcs6500.py
+++ b/hpcs6500.py
@@ -823,7 +823,8 @@ def main():
         csv_writer.writeheader()
         print(f"Saving to: {args.csv}")
 
-    use_psu = not args.no_psu and not args.passive
+    # Only control PSU if explicitly requested or in continuous mode
+    use_psu = args.continuous and not args.no_psu and not args.passive
 
     try:
         if use_psu: