diff --git a/src/pv_controller/MeterPublish.py b/src/pv_controller/MeterPublish.py
index e63484d..2508961 100644
--- a/src/pv_controller/MeterPublish.py
+++ b/src/pv_controller/MeterPublish.py
@@ -9,7 +9,7 @@ def floatAdaptor(i):
     return float(f"{i:0.2f}") if i else 0.0
 
 def onOffAdaptor(i):
-    return ('Off' if i[0] == 0 else 'On') if i else 'x'
+    return i[0] != 0
 
 
 REGISTERS = [