diff --git a/examples/solar-monitoring.py b/examples/solar-monitoring.py
index 3407310..b104bed 100644
--- a/examples/solar-monitoring.py
+++ b/examples/solar-monitoring.py
@@ -117,7 +117,7 @@ def run():
     house_power = subscribe(client, topic_house_power)
     car_soc = subscribe(client, topic_car_soc)
     charge_point_power = subscribe(client, topic_charge_point_power)
-    logging.info("charge point power: " + charge_point_power)
+    logging.info("charge point power: " + str(charge_point_power))
     #monitor(charge_point_power)